Microsoft CVE Summary

This report contains detail for the following vulnerabilities:

Tag CVE ID CVE Title
.NET Core CVE-2023-21538 .NET Denial of Service Vulnerability
3D Builder CVE-2023-21782 3D Builder Remote Code Execution Vulnerability
3D Builder CVE-2023-21781 3D Builder Remote Code Execution Vulnerability
3D Builder CVE-2023-21783 3D Builder Remote Code Execution Vulnerability
3D Builder CVE-2023-21784 3D Builder Remote Code Execution Vulnerability
3D Builder CVE-2023-21791 3D Builder Remote Code Execution Vulnerability
3D Builder CVE-2023-21793 3D Builder Remote Code Execution Vulnerability
3D Builder CVE-2023-21786 3D Builder Remote Code Execution Vulnerability
3D Builder CVE-2023-21790 3D Builder Remote Code Execution Vulnerability
3D Builder CVE-2023-21780 3D Builder Remote Code Execution Vulnerability
3D Builder CVE-2023-21792 3D Builder Remote Code Execution Vulnerability
3D Builder CVE-2023-21789 3D Builder Remote Code Execution Vulnerability
3D Builder CVE-2023-21785 3D Builder Remote Code Execution Vulnerability
3D Builder CVE-2023-21787 3D Builder Remote Code Execution Vulnerability
3D Builder CVE-2023-21788 3D Builder Remote Code Execution Vulnerability
Azure Service Fabric Container CVE-2023-21531 Azure Service Fabric Container Elevation of Privilege Vulnerability
Microsoft Bluetooth Driver CVE-2023-21739 Windows Bluetooth Driver Elevation of Privilege Vulnerability
Microsoft Exchange Server CVE-2023-21764 Microsoft Exchange Server Elevation of Privilege Vulnerability
Microsoft Exchange Server CVE-2023-21763 Microsoft Exchange Server Elevation of Privilege Vulnerability
Microsoft Exchange Server CVE-2023-21762 Microsoft Exchange Server Spoofing Vulnerability
Microsoft Exchange Server CVE-2023-21761 Microsoft Exchange Server Information Disclosure Vulnerability
Microsoft Exchange Server CVE-2023-21745 Microsoft Exchange Server Spoofing Vulnerability
Microsoft Graphics Component CVE-2023-21680 Windows Win32k Elevation of Privilege Vulnerability
Microsoft Graphics Component CVE-2023-21532 Windows GDI Elevation of Privilege Vulnerability
Microsoft Graphics Component CVE-2023-21552 Windows GDI Elevation of Privilege Vulnerability
Microsoft Local Security Authority Server (lsasrv) CVE-2023-21728 Windows Netlogon Denial of Service Vulnerability
Microsoft Message Queuing CVE-2023-21537 Microsoft Message Queuing (MSMQ) Elevation of Privilege Vulnerability
Microsoft Office CVE-2023-21734 Microsoft Office Remote Code Execution Vulnerability
Microsoft Office CVE-2023-21735 Microsoft Office Remote Code Execution Vulnerability
Microsoft Office SharePoint CVE-2023-21742 Microsoft SharePoint Server Remote Code Execution Vulnerability
Microsoft Office SharePoint CVE-2023-21743 Microsoft SharePoint Server Security Feature Bypass Vulnerability
Microsoft Office SharePoint CVE-2023-21744 Microsoft SharePoint Server Remote Code Execution Vulnerability
Microsoft Office Visio CVE-2023-21741 Microsoft Office Visio Information Disclosure Vulnerability
Microsoft Office Visio CVE-2023-21736 Microsoft Office Visio Remote Code Execution Vulnerability
Microsoft Office Visio CVE-2023-21737 Microsoft Office Visio Remote Code Execution Vulnerability
Microsoft Office Visio CVE-2023-21738 Microsoft Office Visio Remote Code Execution Vulnerability
Microsoft WDAC OLE DB provider for SQL CVE-2023-21681 Microsoft WDAC OLE DB provider for SQL Server Remote Code Execution Vulnerability
Visual Studio Code CVE-2023-21779 Visual Studio Code Remote Code Execution
Windows ALPC CVE-2023-21674 Windows Advanced Local Procedure Call (ALPC) Elevation of Privilege Vulnerability
Windows Ancillary Function Driver for WinSock CVE-2023-21768 Windows Ancillary Function Driver for WinSock Elevation of Privilege Vulnerability
Windows Authentication Methods CVE-2023-21539 Windows Authentication Remote Code Execution Vulnerability
Windows Backup Engine CVE-2023-21752 Windows Backup Service Elevation of Privilege Vulnerability
Windows Bind Filter Driver CVE-2023-21733 Windows Bind Filter Driver Elevation of Privilege Vulnerability
Windows BitLocker CVE-2023-21563 BitLocker Security Feature Bypass Vulnerability
Windows Boot Manager CVE-2023-21560 Windows Boot Manager Security Feature Bypass Vulnerability
Windows Credential Manager CVE-2023-21726 Windows Credential Manager User Interface Elevation of Privilege Vulnerability
Windows Cryptographic Services CVE-2023-21559 Windows Cryptographic Information Disclosure Vulnerability
Windows Cryptographic Services CVE-2023-21551 Microsoft Cryptographic Services Elevation of Privilege Vulnerability
Windows Cryptographic Services CVE-2023-21561 Microsoft Cryptographic Services Elevation of Privilege Vulnerability
Windows Cryptographic Services CVE-2023-21540 Windows Cryptographic Information Disclosure Vulnerability
Windows Cryptographic Services CVE-2023-21730 Microsoft Cryptographic Services Elevation of Privilege Vulnerability
Windows Cryptographic Services CVE-2023-21550 Windows Cryptographic Information Disclosure Vulnerability
Windows DWM Core Library CVE-2023-21724 Microsoft DWM Core Library Elevation of Privilege Vulnerability
Windows Error Reporting CVE-2023-21558 Windows Error Reporting Service Elevation of Privilege Vulnerability
Windows Event Tracing CVE-2023-21536 Event Tracing for Windows Information Disclosure Vulnerability
Windows IKE Extension CVE-2023-21758 Windows Internet Key Exchange (IKE) Extension Denial of Service Vulnerability
Windows IKE Extension CVE-2023-21683 Windows Internet Key Exchange (IKE) Extension Denial of Service Vulnerability
Windows IKE Extension CVE-2023-21677 Windows Internet Key Exchange (IKE) Extension Denial of Service Vulnerability
Windows Installer CVE-2023-21542 Windows Installer Elevation of Privilege Vulnerability
Windows Internet Key Exchange (IKE) Protocol CVE-2023-21547 Internet Key Exchange (IKE) Protocol Denial of Service Vulnerability
Windows iSCSI CVE-2023-21527 Windows iSCSI Service Denial of Service Vulnerability
Windows Kernel CVE-2023-21755 Windows Kernel Elevation of Privilege Vulnerability
Windows Kernel CVE-2023-21753 Event Tracing for Windows Information Disclosure Vulnerability
Windows Layer 2 Tunneling Protocol CVE-2023-21556 Windows Layer 2 Tunneling Protocol (L2TP) Remote Code Execution Vulnerability
Windows Layer 2 Tunneling Protocol CVE-2023-21555 Windows Layer 2 Tunneling Protocol (L2TP) Remote Code Execution Vulnerability
Windows Layer 2 Tunneling Protocol CVE-2023-21543 Windows Layer 2 Tunneling Protocol (L2TP) Remote Code Execution Vulnerability
Windows Layer 2 Tunneling Protocol CVE-2023-21546 Windows Layer 2 Tunneling Protocol (L2TP) Remote Code Execution Vulnerability
Windows Layer 2 Tunneling Protocol CVE-2023-21679 Windows Layer 2 Tunneling Protocol (L2TP) Remote Code Execution Vulnerability
Windows LDAP - Lightweight Directory Access Protocol CVE-2023-21676 Windows Lightweight Directory Access Protocol (LDAP) Remote Code Execution Vulnerability
Windows LDAP - Lightweight Directory Access Protocol CVE-2023-21557 Windows Lightweight Directory Access Protocol (LDAP) Denial of Service Vulnerability
Windows Local Security Authority (LSA) CVE-2023-21524 Windows Local Security Authority (LSA) Elevation of Privilege Vulnerability
Windows Local Session Manager (LSM) CVE-2023-21771 Windows Local Session Manager (LSM) Elevation of Privilege Vulnerability
Windows Malicious Software Removal Tool CVE-2023-21725 Windows Malicious Software Removal Tool Elevation of Privilege Vulnerability
Windows Management Instrumentation CVE-2023-21754 Windows Kernel Elevation of Privilege Vulnerability
Windows NTLM CVE-2023-21746 Windows NTLM Elevation of Privilege Vulnerability
Windows ODBC Driver CVE-2023-21732 Microsoft ODBC Driver Remote Code Execution Vulnerability
Windows Overlay Filter CVE-2023-21766 Windows Overlay Filter Information Disclosure Vulnerability
Windows Overlay Filter CVE-2023-21767 Windows Overlay Filter Elevation of Privilege Vulnerability
Windows Point-to-Point Tunneling Protocol CVE-2023-21682 Windows Point-to-Point Protocol (PPP) Information Disclosure Vulnerability
Windows Print Spooler Components CVE-2023-21760 Windows Print Spooler Elevation of Privilege Vulnerability
Windows Print Spooler Components CVE-2023-21765 Windows Print Spooler Elevation of Privilege Vulnerability
Windows Print Spooler Components CVE-2023-21678 Windows Print Spooler Elevation of Privilege Vulnerability
Windows Remote Access Service L2TP Driver CVE-2023-21757 Windows Layer 2 Tunneling Protocol (L2TP) Denial of Service Vulnerability
Windows RPC API CVE-2023-21525 Remote Procedure Call Runtime Denial of Service Vulnerability
Windows Secure Socket Tunneling Protocol (SSTP) CVE-2023-21548 Windows Secure Socket Tunneling Protocol (SSTP) Remote Code Execution Vulnerability
Windows Secure Socket Tunneling Protocol (SSTP) CVE-2023-21535 Windows Secure Socket Tunneling Protocol (SSTP) Remote Code Execution Vulnerability
Windows Smart Card CVE-2023-21759 Windows Smart Card Resource Management Server Security Feature Bypass Vulnerability
Windows Task Scheduler CVE-2023-21541 Windows Task Scheduler Elevation of Privilege Vulnerability
Windows Virtual Registry Provider CVE-2023-21772 Windows Kernel Elevation of Privilege Vulnerability
Windows Virtual Registry Provider CVE-2023-21748 Windows Kernel Elevation of Privilege Vulnerability
Windows Virtual Registry Provider CVE-2023-21773 Windows Kernel Elevation of Privilege Vulnerability
Windows Virtual Registry Provider CVE-2023-21747 Windows Kernel Elevation of Privilege Vulnerability
Windows Virtual Registry Provider CVE-2023-21776 Windows Kernel Information Disclosure Vulnerability
Windows Virtual Registry Provider CVE-2023-21774 Windows Kernel Elevation of Privilege Vulnerability
Windows Virtual Registry Provider CVE-2023-21750 Windows Kernel Elevation of Privilege Vulnerability
Windows Virtual Registry Provider CVE-2023-21675 Windows Kernel Elevation of Privilege Vulnerability
Windows Virtual Registry Provider CVE-2023-21749 Windows Kernel Elevation of Privilege Vulnerability
Windows Workstation Service CVE-2023-21549 Windows SMB Witness Service Elevation of Privilege Vulnerability

CVE-2023-21524 - Windows Local Security Authority (LSA) Elevation of Privilege Vulnerability

(top)
CVE ID Vulnerability Description Maximum Severity Rating Vulnerability Impact
CVE-2023-21524
MITRE
NVD
CVE Title: Windows Local Security Authority (LSA) Elevation of Privilege Vulnerability
CVSS:

CVSS:3.1 7.8/6.8
Base score metrics
Attack VectorLocal
Attack ComplexityLow
Privileges RequiredLow
User InteractionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
Temporal score metrics
Exploit Code MaturityUnproven
Remediation LevelOfficial Fix
Report ConfidenceConfirmed

FAQ:

What privileges could be gained by an attacker who successfully exploited the vulnerability?

An attacker who successfully exploited this vulnerability could impersonate the group Managed Service Account (gMSA) to perform actions or access resources over the network.


Mitigations:
None
Workarounds:
None
Revision:
1.0    2023-01-10T08:00:00    

Information published.


Important Elevation of Privilege

Exploitability Index

The following table provides an exploitability assessment of each of the vulnerabilities addressed this month. The vulnerabilities are listed in order of bulletin ID then CVE ID. Only vulnerabilities that have a severity rating of Critical or Important in the bulletins are included.

Exploitability Assessment Publicly Disclosed Exploited
Exploitation Less Likely No No

Affected Software

The following tables list the affected software details for the vulnerability.

CVE-2023-21524
Product KB Article Severity Impact Supercedence CVSS Score Set Restart Required
Windows 10 for 32-bit Systems 5022297 (Security Update) Important Elevation of Privilege 5021243 Base: 7.8
Temporal: 6.8
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 10 for x64-based Systems 5022297 (Security Update) Important Elevation of Privilege 5021243 Base: 7.8
Temporal: 6.8
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 10 Version 1607 for 32-bit Systems 5022289 (Security Update) Important Elevation of Privilege 5021235 Base: 7.8
Temporal: 6.8
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 10 Version 1607 for x64-based Systems 5022289 (Security Update) Important Elevation of Privilege 5021235 Base: 7.8
Temporal: 6.8
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 10 Version 1809 for 32-bit Systems 5022286 (Security Update) Important Elevation of Privilege 5021237
Base: 7.8
Temporal: 6.8
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 10 Version 1809 for ARM64-based Systems 5022286 (Security Update) Important Elevation of Privilege 5021237
Base: 7.8
Temporal: 6.8
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 10 Version 1809 for x64-based Systems 5022286 (Security Update) Important Elevation of Privilege 5021237
Base: 7.8
Temporal: 6.8
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 10 Version 20H2 for 32-bit Systems 5022282 (Security Update) Important Elevation of Privilege 5021233
Base: 7.8
Temporal: 6.8
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 10 Version 20H2 for ARM64-based Systems 5022282 (Security Update) Important Elevation of Privilege 5021233
Base: 7.8
Temporal: 6.8
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 10 Version 20H2 for x64-based Systems 5022282 (Security Update) Important Elevation of Privilege 5021233
Base: 7.8
Temporal: 6.8
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 10 Version 21H2 for 32-bit Systems 5022282 (Security Update) Important Elevation of Privilege
5021233
Base: 7.8
Temporal: 6.8
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 10 Version 21H2 for ARM64-based Systems 5022282 (Security Update) Important Elevation of Privilege
5021233
Base: 7.8
Temporal: 6.8
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 10 Version 21H2 for x64-based Systems 5022282 (Security Update) Important Elevation of Privilege
5021233
Base: 7.8
Temporal: 6.8
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 10 Version 22H2 for 32-bit Systems 5022282 (Security Update) Important Elevation of Privilege
5021233
Base: 7.8
Temporal: 6.8
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 10 Version 22H2 for ARM64-based Systems 5022282 (Security Update) Important Elevation of Privilege
5021233
Base: 7.8
Temporal: 6.8
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 10 Version 22H2 for x64-based Systems 5022282 (Security Update) Important Elevation of Privilege
5021233
Base: 7.8
Temporal: 6.8
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 11 version 21H2 for ARM64-based Systems 5022287 (Security Update) Important Elevation of Privilege 5021234 Base: 7.8
Temporal: 6.8
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 11 version 21H2 for x64-based Systems 5022287 (Security Update) Important Elevation of Privilege 5021234 Base: 7.8
Temporal: 6.8
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 11 Version 22H2 for ARM64-based Systems 5022303 (Security Update) Important Elevation of Privilege 5021255
Base: 7.8
Temporal: 6.8
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 11 Version 22H2 for x64-based Systems 5022303 (Security Update) Important Elevation of Privilege 5021255
Base: 7.8
Temporal: 6.8
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 7 for 32-bit Systems Service Pack 1 5022338 (Monthly Rollup)
5022339 (Security Only)
Important Elevation of Privilege 5021291
Base: 7.8
Temporal: 6.8
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 8.1 for x64-based systems 5022352 (Monthly Rollup)
5022346 (Security Only)
Important Elevation of Privilege 5021294
Base: 7.8
Temporal: 6.8
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows RT 8.1 5022346 (Security Only) Important Elevation of Privilege Base: 7.8
Temporal: 6.8
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows Server 2012 5022348 (Monthly Rollup)
5022343 (Security Only)
Important Elevation of Privilege 5021285
Base: 7.8
Temporal: 6.8
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows Server 2012 (Server Core installation) 5022348 (Monthly Rollup)
5022343 (Security Only)
Important Elevation of Privilege 5021285
Base: 7.8
Temporal: 6.8
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows Server 2012 R2 5022352 (Monthly Rollup)
5022346 (Security Only)
Important Elevation of Privilege 5021294
Base: 7.8
Temporal: 6.8
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows Server 2012 R2 (Server Core installation) 5022352 (Monthly Rollup)
5022346 (Security Only)
Important Elevation of Privilege 5021294
Base: 7.8
Temporal: 6.8
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows Server 2016 5022289 (Security Update) Important Elevation of Privilege 5021235 Base: 7.8
Temporal: 6.8
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows Server 2016 (Server Core installation) 5022289 (Security Update) Important Elevation of Privilege 5021235 Base: 7.8
Temporal: 6.8
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows Server 2019 5022286 (Security Update) Important Elevation of Privilege 5021237
Base: 7.8
Temporal: 6.8
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows Server 2019 (Server Core installation) 5022286 (Security Update) Important Elevation of Privilege 5021237
Base: 7.8
Temporal: 6.8
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows Server 2022 5022291 (Security Update) Important Elevation of Privilege 5021249 Base: 7.8
Temporal: 6.8
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows Server 2022 (Server Core installation) 5022291 (Security Update) Important Elevation of Privilege 5021249 Base: 7.8
Temporal: 6.8
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes

Acknowledgements

CVE ID Acknowledgements
CVE-2023-21524 Andrey Shaporev with Netwrix


CVE-2023-21532 - Windows GDI Elevation of Privilege Vulnerability

(top)
CVE ID Vulnerability Description Maximum Severity Rating Vulnerability Impact
CVE-2023-21532
MITRE
NVD
CVE Title: Windows GDI Elevation of Privilege Vulnerability
CVSS:

CVSS:3.1 7.0/6.1
Base score metrics
Attack VectorLocal
Attack ComplexityHigh
Privileges RequiredLow
User InteractionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
Temporal score metrics
Exploit Code MaturityUnproven
Remediation LevelOfficial Fix
Report ConfidenceConfirmed

FAQ:

According to the CVSS metric, the attack complexity is high (AC:H). What does that mean for this vulnerability?

Successful exploitation of this vulnerability requires an attacker to win a race condition.


What privileges could be gained by an attacker who successfully exploited the vulnerability?

An attacker who successfully exploited this vulnerability could gain SYSTEM privileges.


Mitigations:
None
Workarounds:
None
Revision:
1.0    2023-01-10T08:00:00    

Information published.


Important Elevation of Privilege

Exploitability Index

The following table provides an exploitability assessment of each of the vulnerabilities addressed this month. The vulnerabilities are listed in order of bulletin ID then CVE ID. Only vulnerabilities that have a severity rating of Critical or Important in the bulletins are included.

Exploitability Assessment Publicly Disclosed Exploited
Exploitation More Likely No No

Affected Software

The following tables list the affected software details for the vulnerability.

CVE-2023-21532
Product KB Article Severity Impact Supercedence CVSS Score Set Restart Required
Windows 10 for 32-bit Systems 5022297 (Security Update) Important Elevation of Privilege 5021243 Base: 7.0
Temporal: 6.1
Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 10 for x64-based Systems 5022297 (Security Update) Important Elevation of Privilege 5021243 Base: 7.0
Temporal: 6.1
Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 10 Version 1607 for 32-bit Systems 5022289 (Security Update) Important Elevation of Privilege 5021235 Base: 7.0
Temporal: 6.1
Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 10 Version 1607 for x64-based Systems 5022289 (Security Update) Important Elevation of Privilege 5021235 Base: 7.0
Temporal: 6.1
Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 10 Version 1809 for 32-bit Systems 5022286 (Security Update) Important Elevation of Privilege 5021237
Base: 7.0
Temporal: 6.1
Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 10 Version 1809 for ARM64-based Systems 5022286 (Security Update) Important Elevation of Privilege 5021237
Base: 7.0
Temporal: 6.1
Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 10 Version 1809 for x64-based Systems 5022286 (Security Update) Important Elevation of Privilege 5021237
Base: 7.0
Temporal: 6.1
Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 10 Version 20H2 for 32-bit Systems 5022282 (Security Update) Important Elevation of Privilege 5021233
Base: 7.0
Temporal: 6.1
Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 10 Version 20H2 for ARM64-based Systems 5022282 (Security Update) Important Elevation of Privilege 5021233
Base: 7.0
Temporal: 6.1
Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 10 Version 20H2 for x64-based Systems 5022282 (Security Update) Important Elevation of Privilege 5021233
Base: 7.0
Temporal: 6.1
Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 10 Version 21H2 for 32-bit Systems 5022282 (Security Update) Important Elevation of Privilege
5021233
Base: 7.0
Temporal: 6.1
Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 10 Version 21H2 for ARM64-based Systems 5022282 (Security Update) Important Elevation of Privilege
5021233
Base: 7.0
Temporal: 6.1
Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 10 Version 21H2 for x64-based Systems 5022282 (Security Update) Important Elevation of Privilege
5021233
Base: 7.0
Temporal: 6.1
Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 10 Version 22H2 for 32-bit Systems 5022282 (Security Update) Important Elevation of Privilege
5021233
Base: 7.0
Temporal: 6.1
Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 10 Version 22H2 for ARM64-based Systems 5022282 (Security Update) Important Elevation of Privilege
5021233
Base: 7.0
Temporal: 6.1
Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 10 Version 22H2 for x64-based Systems 5022282 (Security Update) Important Elevation of Privilege
5021233
Base: 7.0
Temporal: 6.1
Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 11 version 21H2 for ARM64-based Systems 5022287 (Security Update) Important Elevation of Privilege 5021234 Base: 7.0
Temporal: 6.1
Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 11 version 21H2 for x64-based Systems 5022287 (Security Update) Important Elevation of Privilege 5021234 Base: 7.0
Temporal: 6.1
Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 11 Version 22H2 for ARM64-based Systems 5022303 (Security Update) Important Elevation of Privilege 5021255
Base: 7.0
Temporal: 6.1
Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 11 Version 22H2 for x64-based Systems 5022303 (Security Update) Important Elevation of Privilege 5021255
Base: 7.0
Temporal: 6.1
Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 7 for 32-bit Systems Service Pack 1 5022338 (Monthly Rollup)
5022339 (Security Only)
Important Elevation of Privilege 5021291
Base: 7.0
Temporal: 6.1
Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 7 for x64-based Systems Service Pack 1 5022338 (Monthly Rollup)
5022339 (Security Only)
Important Elevation of Privilege 5021291
Base: 7.0
Temporal: 6.1
Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 8.1 for 32-bit systems 5022352 (Monthly Rollup)
5022346 (Security Only)
Important Elevation of Privilege 5021294
Base: 7.0
Temporal: 6.1
Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 8.1 for x64-based systems 5022352 (Monthly Rollup)
5022346 (Security Only)
Important Elevation of Privilege 5021294
Base: 7.0
Temporal: 6.1
Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows RT 8.1 5022346 (Security Only) Important Elevation of Privilege Base: 7.0
Temporal: 6.1
Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows Server 2008 for 32-bit Systems Service Pack 2 5022340 (Monthly Rollup)
5022353 (Security Only)
Important Elevation of Privilege 5021289
Base: 7.0
Temporal: 6.1
Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows Server 2008 for 32-bit Systems Service Pack 2 (Server Core installation) 5022340 (Monthly Rollup)
5022353 (Security Only)
Important Elevation of Privilege 5021289
Base: 7.0
Temporal: 6.1
Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows Server 2008 for x64-based Systems Service Pack 2 5022340 (Monthly Rollup)
5022353 (Security Only)
Important Elevation of Privilege 5021289
Base: 7.0
Temporal: 6.1
Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows Server 2008 for x64-based Systems Service Pack 2 (Server Core installation) 5022340 (Monthly Rollup)
5022353 (Security Only)
Important Elevation of Privilege 5021289
Base: 7.0
Temporal: 6.1
Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows Server 2008 R2 for x64-based Systems Service Pack 1 5022338 (Monthly Rollup)
5022339 (Security Only)
Important Elevation of Privilege 5021291
Base: 7.0
Temporal: 6.1
Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation) 5022338 (Monthly Rollup)
5022339 (Security Only)
Important Elevation of Privilege 5021291
Base: 7.0
Temporal: 6.1
Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows Server 2012 5022348 (Monthly Rollup)
5022343 (Security Only)
Important Elevation of Privilege 5021285
Base: 7.0
Temporal: 6.1
Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows Server 2012 (Server Core installation) 5022348 (Monthly Rollup)
5022343 (Security Only)
Important Elevation of Privilege 5021285
Base: 7.0
Temporal: 6.1
Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows Server 2012 R2 5022352 (Monthly Rollup)
5022346 (Security Only)
Important Elevation of Privilege 5021294
Base: 7.0
Temporal: 6.1
Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows Server 2012 R2 (Server Core installation) 5022352 (Monthly Rollup)
5022346 (Security Only)
Important Elevation of Privilege 5021294
Base: 7.0
Temporal: 6.1
Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows Server 2016 5022289 (Security Update) Important Elevation of Privilege 5021235 Base: 7.0
Temporal: 6.1
Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows Server 2016 (Server Core installation) 5022289 (Security Update) Important Elevation of Privilege 5021235 Base: 7.0
Temporal: 6.1
Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows Server 2019 5022286 (Security Update) Important Elevation of Privilege 5021237
Base: 7.0
Temporal: 6.1
Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows Server 2019 (Server Core installation) 5022286 (Security Update) Important Elevation of Privilege 5021237
Base: 7.0
Temporal: 6.1
Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows Server 2022 5022291 (Security Update) Important Elevation of Privilege 5021249 Base: 7.0
Temporal: 6.1
Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows Server 2022 (Server Core installation) 5022291 (Security Update) Important Elevation of Privilege 5021249 Base: 7.0
Temporal: 6.1
Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes

Acknowledgements

CVE ID Acknowledgements
CVE-2023-21532 Marcin Wiazowski working with Trend Micro Zero Day Initiative


CVE-2023-21535 - Windows Secure Socket Tunneling Protocol (SSTP) Remote Code Execution Vulnerability

(top)
CVE ID Vulnerability Description Maximum Severity Rating Vulnerability Impact
CVE-2023-21535
MITRE
NVD
CVE Title: Windows Secure Socket Tunneling Protocol (SSTP) Remote Code Execution Vulnerability
CVSS:

CVSS:3.1 8.1/7.1
Base score metrics
Attack VectorNetwork
Attack ComplexityHigh
Privileges RequiredNone
User InteractionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
Temporal score metrics
Exploit Code MaturityUnproven
Remediation LevelOfficial Fix
Report ConfidenceConfirmed

FAQ:

According to the CVSS metric, the attack complexity is high (AC:H). What does that mean for this vulnerability?

Successful exploitation of this vulnerability requires an attacker to win a race condition.


How could an attacker exploit this vulnerability?

An unauthenticated attacker could send a specially crafted connection request to a RAS server, which could lead to remote code execution (RCE) on the RAS server machine.


Mitigations:
None
Workarounds:
None
Revision:
1.0    2023-01-10T08:00:00    

Information published.


Critical Remote Code Execution

Exploitability Index

The following table provides an exploitability assessment of each of the vulnerabilities addressed this month. The vulnerabilities are listed in order of bulletin ID then CVE ID. Only vulnerabilities that have a severity rating of Critical or Important in the bulletins are included.

Exploitability Assessment Publicly Disclosed Exploited
Exploitation Less Likely No No

Affected Software

The following tables list the affected software details for the vulnerability.

CVE-2023-21535
Product KB Article Severity Impact Supercedence CVSS Score Set Restart Required
Windows 10 for 32-bit Systems 5022297 (Security Update) Critical Remote Code Execution 5021243 Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 10 for x64-based Systems 5022297 (Security Update) Critical Remote Code Execution 5021243 Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 10 Version 1607 for 32-bit Systems 5022289 (Security Update) Critical Remote Code Execution 5021235 Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 10 Version 1607 for x64-based Systems 5022289 (Security Update) Critical Remote Code Execution 5021235 Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 10 Version 1809 for 32-bit Systems 5022286 (Security Update) Critical Remote Code Execution 5021237
Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 10 Version 1809 for ARM64-based Systems 5022286 (Security Update) Critical Remote Code Execution 5021237
Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 10 Version 1809 for x64-based Systems 5022286 (Security Update) Critical Remote Code Execution 5021237
Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 10 Version 20H2 for 32-bit Systems 5022282 (Security Update) Critical Remote Code Execution 5021233
Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 10 Version 20H2 for ARM64-based Systems 5022282 (Security Update) Critical Remote Code Execution 5021233
Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 10 Version 20H2 for x64-based Systems 5022282 (Security Update) Critical Remote Code Execution 5021233
Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 10 Version 21H2 for 32-bit Systems 5022282 (Security Update) Critical Remote Code Execution
5021233
Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 10 Version 21H2 for ARM64-based Systems 5022282 (Security Update) Critical Remote Code Execution
5021233
Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 10 Version 21H2 for x64-based Systems 5022282 (Security Update) Critical Remote Code Execution
5021233
Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 10 Version 22H2 for 32-bit Systems 5022282 (Security Update) Critical Remote Code Execution
5021233
Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 10 Version 22H2 for ARM64-based Systems 5022282 (Security Update) Critical Remote Code Execution
5021233
Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 10 Version 22H2 for x64-based Systems 5022282 (Security Update) Critical Remote Code Execution
5021233
Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 11 version 21H2 for ARM64-based Systems 5022287 (Security Update) Critical Remote Code Execution 5021234 Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 11 version 21H2 for x64-based Systems 5022287 (Security Update) Critical Remote Code Execution 5021234 Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 11 Version 22H2 for ARM64-based Systems 5022303 (Security Update) Critical Remote Code Execution 5021255
Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 11 Version 22H2 for x64-based Systems 5022303 (Security Update) Critical Remote Code Execution 5021255
Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 8.1 for 32-bit systems 5022352 (Monthly Rollup)
5022346 (Security Only)
Critical Remote Code Execution 5021294
Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 8.1 for x64-based systems 5022352 (Monthly Rollup)
5022346 (Security Only)
Critical Remote Code Execution 5021294
Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows RT 8.1 5022346 (Security Only) Critical Remote Code Execution Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows Server 2008 for 32-bit Systems Service Pack 2 5022340 (Monthly Rollup)
5022353 (Security Only)
Critical Remote Code Execution 5021289
Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows Server 2008 for 32-bit Systems Service Pack 2 (Server Core installation) 5022340 (Monthly Rollup)
5022353 (Security Only)
Critical Remote Code Execution 5021289
Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows Server 2008 for x64-based Systems Service Pack 2 5022340 (Monthly Rollup)
5022353 (Security Only)
Critical Remote Code Execution 5021289
Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows Server 2008 for x64-based Systems Service Pack 2 (Server Core installation) 5022340 (Monthly Rollup)
5022353 (Security Only)
Critical Remote Code Execution 5021289
Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows Server 2012 5022348 (Monthly Rollup)
5022343 (Security Only)
Critical Remote Code Execution 5021285
Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows Server 2012 (Server Core installation) 5022348 (Monthly Rollup)
5022343 (Security Only)
Critical Remote Code Execution 5021285
Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows Server 2012 R2 5022352 (Monthly Rollup)
5022346 (Security Only)
Critical Remote Code Execution 5021294
Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows Server 2012 R2 (Server Core installation) 5022352 (Monthly Rollup)
5022346 (Security Only)
Critical Remote Code Execution 5021294
Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows Server 2016 5022289 (Security Update) Critical Remote Code Execution 5021235 Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows Server 2016 (Server Core installation) 5022289 (Security Update) Critical Remote Code Execution 5021235 Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows Server 2019 5022286 (Security Update) Critical Remote Code Execution 5021237
Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows Server 2019 (Server Core installation) 5022286 (Security Update) Critical Remote Code Execution 5021237
Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows Server 2022 5022291 (Security Update) Critical Remote Code Execution 5021249 Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows Server 2022 (Server Core installation) 5022291 (Security Update) Critical Remote Code Execution 5021249 Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes

Acknowledgements

CVE ID Acknowledgements
CVE-2023-21535 Yuki Chen with Cyber KunLun


CVE-2023-21538 - .NET Denial of Service Vulnerability

(top)
CVE ID Vulnerability Description Maximum Severity Rating Vulnerability Impact
CVE-2023-21538
MITRE
NVD
CVE Title: .NET Denial of Service Vulnerability
CVSS:

CVSS:3.1 7.5/6.5
Base score metrics
Attack VectorNetwork
Attack ComplexityLow
Privileges RequiredNone
User InteractionNone
ScopeUnchanged
ConfidentialityNone
IntegrityNone
AvailabilityHigh
Temporal score metrics
Exploit Code MaturityUnproven
Remediation LevelOfficial Fix
Report ConfidenceConfirmed

FAQ:
None
Mitigations:
None
Workarounds:
None
Revision:
1.0    2023-01-10T08:00:00    

Information published.


Important Denial of Service

Exploitability Index

The following table provides an exploitability assessment of each of the vulnerabilities addressed this month. The vulnerabilities are listed in order of bulletin ID then CVE ID. Only vulnerabilities that have a severity rating of Critical or Important in the bulletins are included.

Exploitability Assessment Publicly Disclosed Exploited
Exploitation Less Likely No No

Affected Software

The following tables list the affected software details for the vulnerability.

CVE-2023-21538
Product KB Article Severity Impact Supercedence CVSS Score Set Restart Required
.NET 6.0 5022546 (Security Update) Important Denial of Service None Base: 7.5
Temporal: 6.5
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C
Maybe

Acknowledgements

CVE ID Acknowledgements
CVE-2023-21538 Johan Gorter with AFAS Software


CVE-2023-21546 - Windows Layer 2 Tunneling Protocol (L2TP) Remote Code Execution Vulnerability

(top)
CVE ID Vulnerability Description Maximum Severity Rating Vulnerability Impact
CVE-2023-21546
MITRE
NVD
CVE Title: Windows Layer 2 Tunneling Protocol (L2TP) Remote Code Execution Vulnerability
CVSS:

CVSS:3.1 8.1/7.1
Base score metrics
Attack VectorNetwork
Attack ComplexityHigh
Privileges RequiredNone
User InteractionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
Temporal score metrics
Exploit Code MaturityUnproven
Remediation LevelOfficial Fix
Report ConfidenceConfirmed

FAQ:

According to the CVSS metric, the attack complexity is high (AC:H). What does that mean for this vulnerability?

Successful exploitation of this vulnerability requires an attacker to win a race condition.


How could an attacker exploit this vulnerability?

An unauthenticated attacker could send a specially crafted connection request to a RAS server, which could lead to remote code execution (RCE) on the RAS server machine.


Mitigations:
None
Workarounds:
None
Revision:
1.0    2023-01-10T08:00:00    

Information published.


Critical Remote Code Execution

Exploitability Index

The following table provides an exploitability assessment of each of the vulnerabilities addressed this month. The vulnerabilities are listed in order of bulletin ID then CVE ID. Only vulnerabilities that have a severity rating of Critical or Important in the bulletins are included.

Exploitability Assessment Publicly Disclosed Exploited
Exploitation Less Likely No No

Affected Software

The following tables list the affected software details for the vulnerability.

CVE-2023-21546
Product KB Article Severity Impact Supercedence CVSS Score Set Restart Required
Windows 10 for 32-bit Systems 5022297 (Security Update) Critical Remote Code Execution 5021243 Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 10 for x64-based Systems 5022297 (Security Update) Critical Remote Code Execution 5021243 Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 10 Version 1607 for 32-bit Systems 5022289 (Security Update) Critical Remote Code Execution 5021235 Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 10 Version 1607 for x64-based Systems 5022289 (Security Update) Critical Remote Code Execution 5021235 Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 10 Version 1809 for 32-bit Systems 5022286 (Security Update) Critical Remote Code Execution 5021237
Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 10 Version 1809 for ARM64-based Systems 5022286 (Security Update) Critical Remote Code Execution 5021237
Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 10 Version 1809 for x64-based Systems 5022286 (Security Update) Critical Remote Code Execution 5021237
Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 10 Version 20H2 for 32-bit Systems 5022282 (Security Update) Critical Remote Code Execution 5021233
Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 10 Version 20H2 for ARM64-based Systems 5022282 (Security Update) Critical Remote Code Execution 5021233
Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 10 Version 20H2 for x64-based Systems 5022282 (Security Update) Critical Remote Code Execution 5021233
Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 10 Version 21H2 for 32-bit Systems 5022282 (Security Update) Critical Remote Code Execution
5021233
Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 10 Version 21H2 for ARM64-based Systems 5022282 (Security Update) Critical Remote Code Execution
5021233
Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 10 Version 21H2 for x64-based Systems 5022282 (Security Update) Critical Remote Code Execution
5021233
Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 10 Version 22H2 for 32-bit Systems 5022282 (Security Update) Critical Remote Code Execution
5021233
Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 10 Version 22H2 for ARM64-based Systems 5022282 (Security Update) Critical Remote Code Execution
5021233
Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 10 Version 22H2 for x64-based Systems 5022282 (Security Update) Critical Remote Code Execution
5021233
Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 11 version 21H2 for ARM64-based Systems 5022287 (Security Update) Critical Remote Code Execution 5021234 Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 11 version 21H2 for x64-based Systems 5022287 (Security Update) Critical Remote Code Execution 5021234 Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 11 Version 22H2 for ARM64-based Systems 5022303 (Security Update) Critical Remote Code Execution 5021255
Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 11 Version 22H2 for x64-based Systems 5022303 (Security Update) Critical Remote Code Execution 5021255
Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 7 for 32-bit Systems Service Pack 1 5022338 (Monthly Rollup)
5022339 (Security Only)
Critical Remote Code Execution 5021291
Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 7 for x64-based Systems Service Pack 1 5022338 (Monthly Rollup)
5022339 (Security Only)
Critical Remote Code Execution 5021291
Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 8.1 for 32-bit systems 5022352 (Monthly Rollup)
5022346 (Security Only)
Critical Remote Code Execution 5021294
Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 8.1 for x64-based systems 5022352 (Monthly Rollup)
5022346 (Security Only)
Critical Remote Code Execution 5021294
Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows RT 8.1 5022346 (Security Only) Critical Remote Code Execution Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows Server 2008 for 32-bit Systems Service Pack 2 5022340 (Monthly Rollup)
5022353 (Security Only)
Critical Remote Code Execution 5021289
Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows Server 2008 for 32-bit Systems Service Pack 2 (Server Core installation) 5022340 (Monthly Rollup)
5022353 (Security Only)
Critical Remote Code Execution 5021289
Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows Server 2008 for x64-based Systems Service Pack 2 5022340 (Monthly Rollup)
5022353 (Security Only)
Critical Remote Code Execution 5021289
Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows Server 2008 for x64-based Systems Service Pack 2 (Server Core installation) 5022340 (Monthly Rollup)
5022353 (Security Only)
Critical Remote Code Execution 5021289
Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows Server 2008 R2 for x64-based Systems Service Pack 1 5022338 (Monthly Rollup)
5022339 (Security Only)
Critical Remote Code Execution 5021291
Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation) 5022338 (Monthly Rollup)
5022339 (Security Only)
Critical Remote Code Execution 5021291
Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows Server 2012 5022348 (Monthly Rollup)
5022343 (Security Only)
Critical Remote Code Execution 5021285
Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows Server 2012 (Server Core installation) 5022348 (Monthly Rollup)
5022343 (Security Only)
Critical Remote Code Execution 5021285
Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows Server 2012 R2 5022352 (Monthly Rollup)
5022346 (Security Only)
Critical Remote Code Execution 5021294
Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows Server 2012 R2 (Server Core installation) 5022352 (Monthly Rollup)
5022346 (Security Only)
Critical Remote Code Execution 5021294
Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows Server 2016 5022289 (Security Update) Critical Remote Code Execution 5021235 Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows Server 2016 (Server Core installation) 5022289 (Security Update) Critical Remote Code Execution 5021235 Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows Server 2019 5022286 (Security Update) Critical Remote Code Execution 5021237
Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows Server 2019 (Server Core installation) 5022286 (Security Update) Critical Remote Code Execution 5021237
Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows Server 2022 5022291 (Security Update) Critical Remote Code Execution 5021249 Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows Server 2022 (Server Core installation) 5022291 (Security Update) Critical Remote Code Execution 5021249 Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes

Acknowledgements

CVE ID Acknowledgements
CVE-2023-21546 Yuki Chen with Cyber KunLun


CVE-2023-21547 - Internet Key Exchange (IKE) Protocol Denial of Service Vulnerability

(top)
CVE ID Vulnerability Description Maximum Severity Rating Vulnerability Impact
CVE-2023-21547
MITRE
NVD
CVE Title: Internet Key Exchange (IKE) Protocol Denial of Service Vulnerability
CVSS:

CVSS:3.1 7.5/6.5
Base score metrics
Attack VectorNetwork
Attack ComplexityLow
Privileges RequiredNone
User InteractionNone
ScopeUnchanged
ConfidentialityNone
IntegrityNone
AvailabilityHigh
Temporal score metrics
Exploit Code MaturityUnproven
Remediation LevelOfficial Fix
Report ConfidenceConfirmed

FAQ:
None
Mitigations:
None
Workarounds:
None
Revision:
1.0    2023-01-10T08:00:00    

Information published.


Important Denial of Service

Exploitability Index

The following table provides an exploitability assessment of each of the vulnerabilities addressed this month. The vulnerabilities are listed in order of bulletin ID then CVE ID. Only vulnerabilities that have a severity rating of Critical or Important in the bulletins are included.

Exploitability Assessment Publicly Disclosed Exploited
Exploitation Less Likely No No

Affected Software

The following tables list the affected software details for the vulnerability.

CVE-2023-21547
Product KB Article Severity Impact Supercedence CVSS Score Set Restart Required
Windows 10 for 32-bit Systems 5022297 (Security Update) Important Denial of Service 5021243 Base: 7.5
Temporal: 6.5
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C
Yes
Windows 10 for x64-based Systems 5022297 (Security Update) Important Denial of Service 5021243 Base: 7.5
Temporal: 6.5
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C
Yes
Windows 10 Version 1607 for 32-bit Systems 5022289 (Security Update) Important Denial of Service 5021235 Base: 7.5
Temporal: 6.5
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C
Yes
Windows 10 Version 1607 for x64-based Systems 5022289 (Security Update) Important Denial of Service 5021235 Base: 7.5
Temporal: 6.5
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C
Yes
Windows 10 Version 1809 for 32-bit Systems 5022286 (Security Update) Important Denial of Service 5021237
Base: 7.5
Temporal: 6.5
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C
Yes
Windows 10 Version 1809 for ARM64-based Systems 5022286 (Security Update) Important Denial of Service 5021237
Base: 7.5
Temporal: 6.5
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C
Yes
Windows 10 Version 1809 for x64-based Systems 5022286 (Security Update) Important Denial of Service 5021237
Base: 7.5
Temporal: 6.5
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C
Yes
Windows 10 Version 20H2 for 32-bit Systems 5022282 (Security Update) Important Denial of Service 5021233
Base: 7.5
Temporal: 6.5
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C
Yes
Windows 10 Version 20H2 for ARM64-based Systems 5022282 (Security Update) Important Denial of Service 5021233
Base: 7.5
Temporal: 6.5
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C
Yes
Windows 10 Version 20H2 for x64-based Systems 5022282 (Security Update) Important Denial of Service 5021233
Base: 7.5
Temporal: 6.5
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C
Yes
Windows 10 Version 21H2 for 32-bit Systems 5022282 (Security Update) Important Denial of Service
5021233
Base: 7.5
Temporal: 6.5
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C
Yes
Windows 10 Version 21H2 for ARM64-based Systems 5022282 (Security Update) Important Denial of Service
5021233
Base: 7.5
Temporal: 6.5
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C
Yes
Windows 10 Version 21H2 for x64-based Systems 5022282 (Security Update) Important Denial of Service
5021233
Base: 7.5
Temporal: 6.5
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C
Yes
Windows 10 Version 22H2 for 32-bit Systems 5022282 (Security Update) Important Denial of Service
5021233
Base: 7.5
Temporal: 6.5
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C
Yes
Windows 10 Version 22H2 for ARM64-based Systems 5022282 (Security Update) Important Denial of Service
5021233
Base: 7.5
Temporal: 6.5
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C
Yes
Windows 10 Version 22H2 for x64-based Systems 5022282 (Security Update) Important Denial of Service
5021233
Base: 7.5
Temporal: 6.5
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C
Yes
Windows 11 version 21H2 for ARM64-based Systems 5022287 (Security Update) Important Denial of Service 5021234 Base: 7.5
Temporal: 6.5
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C
Yes
Windows 11 version 21H2 for x64-based Systems 5022287 (Security Update) Important Denial of Service 5021234 Base: 7.5
Temporal: 6.5
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C
Yes
Windows 11 Version 22H2 for ARM64-based Systems 5022303 (Security Update) Important Denial of Service 5021255
Base: 7.5
Temporal: 6.5
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C
Yes
Windows 11 Version 22H2 for x64-based Systems 5022303 (Security Update) Important Denial of Service 5021255
Base: 7.5
Temporal: 6.5
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C
Yes
Windows Server 2016 5022289 (Security Update) Important Denial of Service 5021235 Base: 7.5
Temporal: 6.5
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C
Yes
Windows Server 2016 (Server Core installation) 5022289 (Security Update) Important Denial of Service 5021235 Base: 7.5
Temporal: 6.5
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C
Yes
Windows Server 2019 5022286 (Security Update) Important Denial of Service 5021237
Base: 7.5
Temporal: 6.5
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C
Yes
Windows Server 2019 (Server Core installation) 5022286 (Security Update) Important Denial of Service 5021237
Base: 7.5
Temporal: 6.5
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C
Yes
Windows Server 2022 5022291 (Security Update) Important Denial of Service 5021249 Base: 7.5
Temporal: 6.5
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C
Yes
Windows Server 2022 (Server Core installation) 5022291 (Security Update) Important Denial of Service 5021249 Base: 7.5
Temporal: 6.5
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C
Yes

Acknowledgements

CVE ID Acknowledgements
CVE-2023-21547 Yuki Chen with Cyber KunLun


CVE-2023-21539 - Windows Authentication Remote Code Execution Vulnerability

(top)
CVE ID Vulnerability Description Maximum Severity Rating Vulnerability Impact
CVE-2023-21539
MITRE
NVD
CVE Title: Windows Authentication Remote Code Execution Vulnerability
CVSS:

CVSS:3.1 7.5/6.5
Base score metrics
Attack VectorNetwork
Attack ComplexityHigh
Privileges RequiredLow
User InteractionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
Temporal score metrics
Exploit Code MaturityUnproven
Remediation LevelOfficial Fix
Report ConfidenceConfirmed

FAQ:

According to the CVSS metric, the attack complexity is high (AC:H). What does that mean for this vulnerability?

Successful exploitation of this vulnerability requires an attacker to take additional actions prior to exploitation to prepare the target environment.


According to the CVSS metric, privileges required is low (PR:L). What does that mean for this vulnerability?

An attacker must already have access and the ability to run code on the target system. This technique does not allow for remote code execution in cases where the attacker does not already have that ability on the target system.


Mitigations:
None
Workarounds:
None
Revision:
1.0    2023-01-10T08:00:00    

Information published.


Important Remote Code Execution

Exploitability Index

The following table provides an exploitability assessment of each of the vulnerabilities addressed this month. The vulnerabilities are listed in order of bulletin ID then CVE ID. Only vulnerabilities that have a severity rating of Critical or Important in the bulletins are included.

Exploitability Assessment Publicly Disclosed Exploited
Exploitation Less Likely No No

Affected Software

The following tables list the affected software details for the vulnerability.

CVE-2023-21539
Product KB Article Severity Impact Supercedence CVSS Score Set Restart Required
Windows 10 Version 20H2 for 32-bit Systems 5022282 (Security Update) Important Remote Code Execution 5021233
Base: 7.5
Temporal: 6.5
Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 10 Version 20H2 for ARM64-based Systems 5022282 (Security Update) Important Remote Code Execution 5021233
Base: 7.5
Temporal: 6.5
Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 10 Version 20H2 for x64-based Systems 5022282 (Security Update) Important Remote Code Execution 5021233
Base: 7.5
Temporal: 6.5
Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 10 Version 21H2 for 32-bit Systems 5022282 (Security Update) Important Remote Code Execution
5021233
Base: 7.5
Temporal: 6.5
Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 10 Version 21H2 for ARM64-based Systems 5022282 (Security Update) Important Remote Code Execution
5021233
Base: 7.5
Temporal: 6.5
Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 10 Version 21H2 for x64-based Systems 5022282 (Security Update) Important Remote Code Execution
5021233
Base: 7.5
Temporal: 6.5
Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 10 Version 22H2 for 32-bit Systems 5022282 (Security Update) Important Remote Code Execution
5021233
Base: 7.5
Temporal: 6.5
Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 10 Version 22H2 for ARM64-based Systems 5022282 (Security Update) Important Remote Code Execution
5021233
Base: 7.5
Temporal: 6.5
Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 10 Version 22H2 for x64-based Systems 5022282 (Security Update) Important Remote Code Execution
5021233
Base: 7.5
Temporal: 6.5
Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 11 version 21H2 for ARM64-based Systems 5022287 (Security Update) Important Remote Code Execution 5021234 Base: 7.5
Temporal: 6.5
Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 11 version 21H2 for x64-based Systems 5022287 (Security Update) Important Remote Code Execution 5021234 Base: 7.5
Temporal: 6.5
Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 11 Version 22H2 for ARM64-based Systems 5022303 (Security Update) Important Remote Code Execution 5021255
Base: 7.5
Temporal: 6.5
Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 11 Version 22H2 for x64-based Systems 5022303 (Security Update) Important Remote Code Execution 5021255
Base: 7.5
Temporal: 6.5
Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows Server 2022 5022291 (Security Update) Important Remote Code Execution 5021249 Base: 7.5
Temporal: 6.5
Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows Server 2022 (Server Core installation) 5022291 (Security Update) Important Remote Code Execution 5021249 Base: 7.5
Temporal: 6.5
Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes

Acknowledgements

CVE ID Acknowledgements
CVE-2023-21539 Alexander Clouter with coreMem Limited and Alan DeKok with NetworkRADIUS


CVE-2023-21540 - Windows Cryptographic Information Disclosure Vulnerability

(top)
CVE ID Vulnerability Description Maximum Severity Rating Vulnerability Impact
CVE-2023-21540
MITRE
NVD
CVE Title: Windows Cryptographic Information Disclosure Vulnerability
CVSS:

CVSS:3.1 5.5/4.8
Base score metrics
Attack VectorLocal
Attack ComplexityLow
Privileges RequiredLow
User InteractionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityNone
AvailabilityNone
Temporal score metrics
Exploit Code MaturityUnproven
Remediation LevelOfficial Fix
Report ConfidenceConfirmed

FAQ:

What type of information could be disclosed by this vulnerability?

The type of information that could be disclosed if an attacker successfully exploited this vulnerability is Windows cryptographic secrets.


Mitigations:
None
Workarounds:
None
Revision:
1.0    2023-01-10T08:00:00    

Information published.


Important Information Disclosure

Exploitability Index

The following table provides an exploitability assessment of each of the vulnerabilities addressed this month. The vulnerabilities are listed in order of bulletin ID then CVE ID. Only vulnerabilities that have a severity rating of Critical or Important in the bulletins are included.

Exploitability Assessment Publicly Disclosed Exploited
Exploitation Less Likely No No

Affected Software

The following tables list the affected software details for the vulnerability.

CVE-2023-21540
Product KB Article Severity Impact Supercedence CVSS Score Set Restart Required
Windows 10 Version 1809 for 32-bit Systems 5022286 (Security Update) Important Information Disclosure 5021237
Base: 5.5
Temporal: 4.8
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C
Yes
Windows 10 Version 1809 for ARM64-based Systems 5022286 (Security Update) Important Information Disclosure 5021237
Base: 5.5
Temporal: 4.8
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C
Yes
Windows 10 Version 1809 for x64-based Systems 5022286 (Security Update) Important Information Disclosure 5021237
Base: 5.5
Temporal: 4.8
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C
Yes
Windows 10 Version 20H2 for 32-bit Systems 5022282 (Security Update) Important Information Disclosure 5021233
Base: 5.5
Temporal: 4.8
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C
Yes
Windows 10 Version 20H2 for ARM64-based Systems 5022282 (Security Update) Important Information Disclosure 5021233
Base: 5.5
Temporal: 4.8
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C
Yes
Windows 10 Version 20H2 for x64-based Systems 5022282 (Security Update) Important Information Disclosure 5021233
Base: 5.5
Temporal: 4.8
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C
Yes
Windows 10 Version 21H2 for 32-bit Systems 5022282 (Security Update) Important Information Disclosure
5021233
Base: 5.5
Temporal: 4.8
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C
Yes
Windows 10 Version 21H2 for ARM64-based Systems 5022282 (Security Update) Important Information Disclosure
5021233
Base: 5.5
Temporal: 4.8
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C
Yes
Windows 10 Version 21H2 for x64-based Systems 5022282 (Security Update) Important Information Disclosure
5021233
Base: 5.5
Temporal: 4.8
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C
Yes
Windows 10 Version 22H2 for 32-bit Systems 5022282 (Security Update) Important Information Disclosure
5021233
Base: 5.5
Temporal: 4.8
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C
Yes
Windows 10 Version 22H2 for ARM64-based Systems 5022282 (Security Update) Important Information Disclosure
5021233
Base: 5.5
Temporal: 4.8
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C
Yes
Windows 10 Version 22H2 for x64-based Systems 5022282 (Security Update) Important Information Disclosure
5021233
Base: 5.5
Temporal: 4.8
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C
Yes
Windows 11 version 21H2 for ARM64-based Systems 5022287 (Security Update) Important Information Disclosure 5021234 Base: 5.5
Temporal: 4.8
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C
Yes
Windows 11 version 21H2 for x64-based Systems 5022287 (Security Update) Important Information Disclosure 5021234 Base: 5.5
Temporal: 4.8
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C
Yes
Windows 11 Version 22H2 for ARM64-based Systems 5022303 (Security Update) Important Information Disclosure 5021255
Base: 5.5
Temporal: 4.8
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C
Yes
Windows 11 Version 22H2 for x64-based Systems 5022303 (Security Update) Important Information Disclosure 5021255
Base: 5.5
Temporal: 4.8
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C
Yes
Windows Server 2019 5022286 (Security Update) Important Information Disclosure 5021237
Base: 5.5
Temporal: 4.8
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C
Yes
Windows Server 2019 (Server Core installation) 5022286 (Security Update) Important Information Disclosure 5021237
Base: 5.5
Temporal: 4.8
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C
Yes
Windows Server 2022 5022291 (Security Update) Important Information Disclosure 5021249 Base: 5.5
Temporal: 4.8
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C
Yes
Windows Server 2022 (Server Core installation) 5022291 (Security Update) Important Information Disclosure 5021249 Base: 5.5
Temporal: 4.8
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C
Yes

Acknowledgements

CVE ID Acknowledgements
CVE-2023-21540 Microsoft Offensive Research and Security Engineering (MORSE)


CVE-2023-21541 - Windows Task Scheduler Elevation of Privilege Vulnerability

(top)
CVE ID Vulnerability Description Maximum Severity Rating Vulnerability Impact
CVE-2023-21541
MITRE
NVD
CVE Title: Windows Task Scheduler Elevation of Privilege Vulnerability
CVSS:

CVSS:3.1 7.8/6.8
Base score metrics
Attack VectorLocal
Attack ComplexityLow
Privileges RequiredLow
User InteractionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
Temporal score metrics
Exploit Code MaturityUnproven
Remediation LevelOfficial Fix
Report ConfidenceConfirmed

FAQ:

What privileges could be gained by an attacker who successfully exploited the vulnerability?

An attacker who successfully exploited this vulnerability could gain SYSTEM privileges.


Mitigations:
None
Workarounds:
None
Revision:
1.0    2023-01-10T08:00:00    

Information published.


Important Elevation of Privilege

Exploitability Index

The following table provides an exploitability assessment of each of the vulnerabilities addressed this month. The vulnerabilities are listed in order of bulletin ID then CVE ID. Only vulnerabilities that have a severity rating of Critical or Important in the bulletins are included.

Exploitability Assessment Publicly Disclosed Exploited
Exploitation More Likely No No

Affected Software

The following tables list the affected software details for the vulnerability.

CVE-2023-21541
Product KB Article Severity Impact Supercedence CVSS Score Set Restart Required
Windows 10 for 32-bit Systems 5022297 (Security Update) Important Elevation of Privilege 5021243 Base: 7.8
Temporal: 6.8
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 10 for x64-based Systems 5022297 (Security Update) Important Elevation of Privilege 5021243 Base: 7.8
Temporal: 6.8
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 10 Version 1607 for 32-bit Systems 5022289 (Security Update) Important Elevation of Privilege 5021235 Base: 7.8
Temporal: 6.8
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 10 Version 1607 for x64-based Systems 5022289 (Security Update) Important Elevation of Privilege 5021235 Base: 7.8
Temporal: 6.8
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 10 Version 1809 for 32-bit Systems 5022286 (Security Update) Important Elevation of Privilege 5021237
Base: 7.8
Temporal: 6.8
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 10 Version 1809 for ARM64-based Systems 5022286 (Security Update) Important Elevation of Privilege 5021237
Base: 7.8
Temporal: 6.8
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 10 Version 1809 for x64-based Systems 5022286 (Security Update) Important Elevation of Privilege 5021237
Base: 7.8
Temporal: 6.8
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 10 Version 20H2 for 32-bit Systems 5022282 (Security Update) Important Elevation of Privilege 5021233
Base: 7.8
Temporal: 6.8
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 10 Version 20H2 for ARM64-based Systems 5022282 (Security Update) Important Elevation of Privilege 5021233
Base: 7.8
Temporal: 6.8
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 10 Version 20H2 for x64-based Systems 5022282 (Security Update) Important Elevation of Privilege 5021233
Base: 7.8
Temporal: 6.8
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 10 Version 21H2 for 32-bit Systems 5022282 (Security Update) Important Elevation of Privilege
5021233
Base: 7.8
Temporal: 6.8
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 10 Version 21H2 for ARM64-based Systems 5022282 (Security Update) Important Elevation of Privilege
5021233
Base: 7.8
Temporal: 6.8
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 10 Version 21H2 for x64-based Systems 5022282 (Security Update) Important Elevation of Privilege
5021233
Base: 7.8
Temporal: 6.8
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 10 Version 22H2 for 32-bit Systems 5022282 (Security Update) Important Elevation of Privilege
5021233
Base: 7.8
Temporal: 6.8
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 10 Version 22H2 for ARM64-based Systems 5022282 (Security Update) Important Elevation of Privilege
5021233
Base: 7.8
Temporal: 6.8
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 10 Version 22H2 for x64-based Systems 5022282 (Security Update) Important Elevation of Privilege
5021233
Base: 7.8
Temporal: 6.8
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 11 version 21H2 for ARM64-based Systems 5022287 (Security Update) Important Elevation of Privilege 5021234 Base: 7.8
Temporal: 6.8
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 11 version 21H2 for x64-based Systems 5022287 (Security Update) Important Elevation of Privilege 5021234 Base: 7.8
Temporal: 6.8
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 11 Version 22H2 for ARM64-based Systems 5022303 (Security Update) Important Elevation of Privilege 5021255
Base: 7.8
Temporal: 6.8
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 11 Version 22H2 for x64-based Systems 5022303 (Security Update) Important Elevation of Privilege 5021255
Base: 7.8
Temporal: 6.8
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 7 for 32-bit Systems Service Pack 1 5022338 (Monthly Rollup)
5022339 (Security Only)
Important Elevation of Privilege 5021291
Base: 7.8
Temporal: 6.8
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 7 for x64-based Systems Service Pack 1 5022338 (Monthly Rollup)
5022339 (Security Only)
Important Elevation of Privilege 5021291
Base: 7.8
Temporal: 6.8
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 8.1 for 32-bit systems 5022352 (Monthly Rollup)
5022346 (Security Only)
Important Elevation of Privilege 5021294
Base: 7.8
Temporal: 6.8
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 8.1 for x64-based systems 5022352 (Monthly Rollup)
5022346 (Security Only)
Important Elevation of Privilege 5021294
Base: 7.8
Temporal: 6.8
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows RT 8.1 5022346 (Security Only) Important Elevation of Privilege Base: 7.8
Temporal: 6.8
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows Server 2008 for 32-bit Systems Service Pack 2 5022340 (Monthly Rollup)
5022353 (Security Only)
Important Elevation of Privilege 5021289
Base: 7.8
Temporal: 6.8
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows Server 2008 for 32-bit Systems Service Pack 2 (Server Core installation) 5022340 (Monthly Rollup)
5022353 (Security Only)
Important Elevation of Privilege 5021289
Base: 7.8
Temporal: 6.8
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows Server 2008 for x64-based Systems Service Pack 2 5022340 (Monthly Rollup)
5022353 (Security Only)
Important Elevation of Privilege 5021289
Base: 7.8
Temporal: 6.8
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows Server 2008 for x64-based Systems Service Pack 2 (Server Core installation) 5022340 (Monthly Rollup)
5022353 (Security Only)
Important Elevation of Privilege 5021289
Base: 7.8
Temporal: 6.8
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows Server 2008 R2 for x64-based Systems Service Pack 1 5022338 (Monthly Rollup)
5022339 (Security Only)
Important Elevation of Privilege 5021291
Base: 7.8
Temporal: 6.8
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation) 5022338 (Monthly Rollup)
5022339 (Security Only)
Important Elevation of Privilege 5021291
Base: 7.8
Temporal: 6.8
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows Server 2012 5022348 (Monthly Rollup)
5022343 (Security Only)
Important Elevation of Privilege 5021285
Base: 7.8
Temporal: 6.8
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows Server 2012 (Server Core installation) 5022348 (Monthly Rollup)
5022343 (Security Only)
Important Elevation of Privilege 5021285
Base: 7.8
Temporal: 6.8
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows Server 2012 R2 5022352 (Monthly Rollup)
5022346 (Security Only)
Important Elevation of Privilege 5021294
Base: 7.8
Temporal: 6.8
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows Server 2012 R2 (Server Core installation) 5022352 (Monthly Rollup)
5022346 (Security Only)
Important Elevation of Privilege 5021294
Base: 7.8
Temporal: 6.8
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows Server 2016 5022289 (Security Update) Important Elevation of Privilege 5021235 Base: 7.8
Temporal: 6.8
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows Server 2016 (Server Core installation) 5022289 (Security Update) Important Elevation of Privilege 5021235 Base: 7.8
Temporal: 6.8
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows Server 2019 5022286 (Security Update) Important Elevation of Privilege 5021237
Base: 7.8
Temporal: 6.8
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows Server 2019 (Server Core installation) 5022286 (Security Update) Important Elevation of Privilege 5021237
Base: 7.8
Temporal: 6.8
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows Server 2022 5022291 (Security Update) Important Elevation of Privilege 5021249 Base: 7.8
Temporal: 6.8
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows Server 2022 (Server Core installation) 5022291 (Security Update) Important Elevation of Privilege 5021249 Base: 7.8
Temporal: 6.8
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes

Acknowledgements

CVE ID Acknowledgements
CVE-2023-21541 Ben Lincoln with Bishop Fox


CVE-2023-21542 - Windows Installer Elevation of Privilege Vulnerability

(top)
CVE ID Vulnerability Description Maximum Severity Rating Vulnerability Impact
CVE-2023-21542
MITRE
NVD
CVE Title: Windows Installer Elevation of Privilege Vulnerability
CVSS:

CVSS:3.1 7.0/6.1
Base score metrics
Attack VectorLocal
Attack ComplexityHigh
Privileges RequiredLow
User InteractionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
Temporal score metrics
Exploit Code MaturityUnproven
Remediation LevelOfficial Fix
Report ConfidenceConfirmed

FAQ:

According to the CVSS metric, the attack complexity is high (AC:H). What does that mean for this vulnerability?

Successful exploitation of this vulnerability requires an attacker to win a race condition.


What privileges could be gained by an attacker who successfully exploited the vulnerability?

An attacker who successfully exploited this vulnerability could gain SYSTEM privileges.


Mitigations:
None
Workarounds:
None
Revision:
1.0    2023-01-10T08:00:00    

Information published.


Important Elevation of Privilege

Exploitability Index

The following table provides an exploitability assessment of each of the vulnerabilities addressed this month. The vulnerabilities are listed in order of bulletin ID then CVE ID. Only vulnerabilities that have a severity rating of Critical or Important in the bulletins are included.

Exploitability Assessment Publicly Disclosed Exploited
Exploitation Less Likely No No

Affected Software

The following tables list the affected software details for the vulnerability.

CVE-2023-21542
Product KB Article Severity Impact Supercedence CVSS Score Set Restart Required
Windows 10 for 32-bit Systems 5022297 (Security Update) Important Elevation of Privilege 5021243 Base: 7.0
Temporal: 6.1
Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 10 for x64-based Systems 5022297 (Security Update) Important Elevation of Privilege 5021243 Base: 7.0
Temporal: 6.1
Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 10 Version 1607 for 32-bit Systems 5022289 (Security Update) Important Elevation of Privilege 5021235 Base: 7.0
Temporal: 6.1
Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 10 Version 1607 for x64-based Systems 5022289 (Security Update) Important Elevation of Privilege 5021235 Base: 7.0
Temporal: 6.1
Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 7 for 32-bit Systems Service Pack 1 5022338 (Monthly Rollup)
5022339 (Security Only)
Important Elevation of Privilege 5021291
Base: 7.0
Temporal: 6.1
Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 7 for x64-based Systems Service Pack 1 5022338 (Monthly Rollup)
5022339 (Security Only)
Important Elevation of Privilege 5021291
Base: 7.0
Temporal: 6.1
Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 8.1 for 32-bit systems 5022352 (Monthly Rollup)
5022346 (Security Only)
Important Elevation of Privilege 5021294
Base: 7.0
Temporal: 6.1
Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 8.1 for x64-based systems 5022352 (Monthly Rollup)
5022346 (Security Only)
Important Elevation of Privilege 5021294
Base: 7.0
Temporal: 6.1
Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows RT 8.1 5022346 (Security Only) Important Elevation of Privilege Base: 7.0
Temporal: 6.1
Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows Server 2008 for 32-bit Systems Service Pack 2 5022340 (Monthly Rollup)
5022353 (Security Only)
Important Elevation of Privilege 5021289
Base: 7.0
Temporal: 6.1
Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows Server 2008 for 32-bit Systems Service Pack 2 (Server Core installation) 5022340 (Monthly Rollup)
5022353 (Security Only)
Important Elevation of Privilege 5021289
Base: 7.0
Temporal: 6.1
Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows Server 2008 for x64-based Systems Service Pack 2 5022340 (Monthly Rollup)
5022353 (Security Only)
Important Elevation of Privilege 5021289
Base: 7.0
Temporal: 6.1
Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows Server 2008 for x64-based Systems Service Pack 2 (Server Core installation) 5022340 (Monthly Rollup)
5022353 (Security Only)
Important Elevation of Privilege 5021289
Base: 7.0
Temporal: 6.1
Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows Server 2008 R2 for x64-based Systems Service Pack 1 5022338 (Monthly Rollup)
5022339 (Security Only)
Important Elevation of Privilege 5021291
Base: 7.0
Temporal: 6.1
Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation) 5022338 (Monthly Rollup)
5022339 (Security Only)
Important Elevation of Privilege 5021291
Base: 7.0
Temporal: 6.1
Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows Server 2012 5022348 (Monthly Rollup)
5022343 (Security Only)
Important Elevation of Privilege 5021285
Base: 7.0
Temporal: 6.1
Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows Server 2012 (Server Core installation) 5022348 (Monthly Rollup)
5022343 (Security Only)
Important Elevation of Privilege 5021285
Base: 7.0
Temporal: 6.1
Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows Server 2012 R2 5022352 (Monthly Rollup)
5022346 (Security Only)
Important Elevation of Privilege 5021294
Base: 7.0
Temporal: 6.1
Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows Server 2012 R2 (Server Core installation) 5022352 (Monthly Rollup)
5022346 (Security Only)
Important Elevation of Privilege 5021294
Base: 7.0
Temporal: 6.1
Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows Server 2016 5022289 (Security Update) Important Elevation of Privilege 5021235 Base: 7.0
Temporal: 6.1
Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows Server 2016 (Server Core installation) 5022289 (Security Update) Important Elevation of Privilege 5021235 Base: 7.0
Temporal: 6.1
Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes

Acknowledgements

CVE ID Acknowledgements
CVE-2023-21542 QueryX Team of Theori working with Trend Micro Zero Day Initiative


CVE-2023-21543 - Windows Layer 2 Tunneling Protocol (L2TP) Remote Code Execution Vulnerability

(top)
CVE ID Vulnerability Description Maximum Severity Rating Vulnerability Impact
CVE-2023-21543
MITRE
NVD
CVE Title: Windows Layer 2 Tunneling Protocol (L2TP) Remote Code Execution Vulnerability
CVSS:

CVSS:3.1 8.1/7.1
Base score metrics
Attack VectorNetwork
Attack ComplexityHigh
Privileges RequiredNone
User InteractionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
Temporal score metrics
Exploit Code MaturityUnproven
Remediation LevelOfficial Fix
Report ConfidenceConfirmed

FAQ:

According to the CVSS metric, the attack complexity is high (AC:H). What does that mean for this vulnerability?

Successful exploitation of this vulnerability requires an attacker to take additional actions prior to exploitation to prepare the target environment.


How could an attacker exploit this vulnerability?

An unauthenticated attacker could send a specially crafted connection request to a RAS server, which could lead to remote code execution (RCE) on the RAS server machine.


Mitigations:
None
Workarounds:
None
Revision:
1.0    2023-01-10T08:00:00    

Information published.


Critical Remote Code Execution

Exploitability Index

The following table provides an exploitability assessment of each of the vulnerabilities addressed this month. The vulnerabilities are listed in order of bulletin ID then CVE ID. Only vulnerabilities that have a severity rating of Critical or Important in the bulletins are included.

Exploitability Assessment Publicly Disclosed Exploited
Exploitation Less Likely No No

Affected Software

The following tables list the affected software details for the vulnerability.

CVE-2023-21543
Product KB Article Severity Impact Supercedence CVSS Score Set Restart Required
Windows 10 for 32-bit Systems 5022297 (Security Update) Critical Remote Code Execution 5021243 Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 10 for x64-based Systems 5022297 (Security Update) Critical Remote Code Execution 5021243 Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 10 Version 1607 for 32-bit Systems 5022289 (Security Update) Critical Remote Code Execution 5021235 Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 10 Version 1607 for x64-based Systems 5022289 (Security Update) Critical Remote Code Execution 5021235 Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 10 Version 1809 for 32-bit Systems 5022286 (Security Update) Critical Remote Code Execution 5021237
Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 10 Version 1809 for ARM64-based Systems 5022286 (Security Update) Critical Remote Code Execution 5021237
Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 10 Version 1809 for x64-based Systems 5022286 (Security Update) Critical Remote Code Execution 5021237
Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 10 Version 20H2 for 32-bit Systems 5022282 (Security Update) Critical Remote Code Execution 5021233
Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 10 Version 20H2 for ARM64-based Systems 5022282 (Security Update) Critical Remote Code Execution 5021233
Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 10 Version 20H2 for x64-based Systems 5022282 (Security Update) Critical Remote Code Execution 5021233
Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 10 Version 21H2 for 32-bit Systems 5022282 (Security Update) Critical Remote Code Execution
5021233
Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 10 Version 21H2 for ARM64-based Systems 5022282 (Security Update) Critical Remote Code Execution
5021233
Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 10 Version 21H2 for x64-based Systems 5022282 (Security Update) Critical Remote Code Execution
5021233
Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 10 Version 22H2 for 32-bit Systems 5022282 (Security Update) Critical Remote Code Execution
5021233
Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 10 Version 22H2 for ARM64-based Systems 5022282 (Security Update) Critical Remote Code Execution
5021233
Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 10 Version 22H2 for x64-based Systems 5022282 (Security Update) Critical Remote Code Execution
5021233
Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 11 version 21H2 for ARM64-based Systems 5022287 (Security Update) Critical Remote Code Execution 5021234 Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 11 version 21H2 for x64-based Systems 5022287 (Security Update) Critical Remote Code Execution 5021234 Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 11 Version 22H2 for ARM64-based Systems 5022303 (Security Update) Critical Remote Code Execution 5021255
Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 11 Version 22H2 for x64-based Systems 5022303 (Security Update) Critical Remote Code Execution 5021255
Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 7 for 32-bit Systems Service Pack 1 5022338 (Monthly Rollup)
5022339 (Security Only)
Critical Remote Code Execution 5021291
Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 7 for x64-based Systems Service Pack 1 5022338 (Monthly Rollup)
5022339 (Security Only)
Critical Remote Code Execution 5021291
Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 8.1 for 32-bit systems 5022352 (Monthly Rollup)
5022346 (Security Only)
Critical Remote Code Execution 5021294
Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 8.1 for x64-based systems 5022352 (Monthly Rollup)
5022346 (Security Only)
Critical Remote Code Execution 5021294
Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows RT 8.1 5022346 (Security Only) Critical Remote Code Execution Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows Server 2008 for 32-bit Systems Service Pack 2 5022340 (Monthly Rollup)
5022353 (Security Only)
Critical Remote Code Execution 5021289
Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows Server 2008 for 32-bit Systems Service Pack 2 (Server Core installation) 5022340 (Monthly Rollup)
5022353 (Security Only)
Critical Remote Code Execution 5021289
Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows Server 2008 for x64-based Systems Service Pack 2 5022340 (Monthly Rollup)
5022353 (Security Only)
Critical Remote Code Execution 5021289
Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows Server 2008 for x64-based Systems Service Pack 2 (Server Core installation) 5022340 (Monthly Rollup)
5022353 (Security Only)
Critical Remote Code Execution 5021289
Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows Server 2008 R2 for x64-based Systems Service Pack 1 5022338 (Monthly Rollup)
5022339 (Security Only)
Critical Remote Code Execution 5021291
Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation) 5022338 (Monthly Rollup)
5022339 (Security Only)
Critical Remote Code Execution 5021291
Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows Server 2012 5022348 (Monthly Rollup)
5022343 (Security Only)
Critical Remote Code Execution 5021285
Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows Server 2012 (Server Core installation) 5022348 (Monthly Rollup)
5022343 (Security Only)
Critical Remote Code Execution 5021285
Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows Server 2012 R2 5022352 (Monthly Rollup)
5022346 (Security Only)
Critical Remote Code Execution 5021294
Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows Server 2012 R2 (Server Core installation) 5022352 (Monthly Rollup)
5022346 (Security Only)
Critical Remote Code Execution 5021294
Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows Server 2016 5022289 (Security Update) Critical Remote Code Execution 5021235 Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows Server 2016 (Server Core installation) 5022289 (Security Update) Critical Remote Code Execution 5021235 Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows Server 2019 5022286 (Security Update) Critical Remote Code Execution 5021237
Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows Server 2019 (Server Core installation) 5022286 (Security Update) Critical Remote Code Execution 5021237
Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows Server 2022 5022291 (Security Update) Critical Remote Code Execution 5021249 Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows Server 2022 (Server Core installation) 5022291 (Security Update) Critical Remote Code Execution 5021249 Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes

Acknowledgements

CVE ID Acknowledgements
CVE-2023-21543 RyeLv (@b2ahex)


CVE-2023-21548 - Windows Secure Socket Tunneling Protocol (SSTP) Remote Code Execution Vulnerability

(top)
CVE ID Vulnerability Description Maximum Severity Rating Vulnerability Impact
CVE-2023-21548
MITRE
NVD
CVE Title: Windows Secure Socket Tunneling Protocol (SSTP) Remote Code Execution Vulnerability
CVSS:

CVSS:3.1 8.1/7.1
Base score metrics
Attack VectorNetwork
Attack ComplexityHigh
Privileges RequiredNone
User InteractionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
Temporal score metrics
Exploit Code MaturityUnproven
Remediation LevelOfficial Fix
Report ConfidenceConfirmed

FAQ:

According to the CVSS metric, the attack complexity is high (AC:H). What does that mean for this vulnerability?

Successful exploitation of this vulnerability requires an attacker to win a race condition.


How could an attacker exploit the vulnerability?

To exploit this vulnerability, an attacker would need to send a specially crafted malicious SSTP packet to a SSTP server. This could result in remote code execution on the server side.


Mitigations:
None
Workarounds:
None
Revision:
1.0    2023-01-10T08:00:00    

Information published.


Critical Remote Code Execution

Exploitability Index

The following table provides an exploitability assessment of each of the vulnerabilities addressed this month. The vulnerabilities are listed in order of bulletin ID then CVE ID. Only vulnerabilities that have a severity rating of Critical or Important in the bulletins are included.

Exploitability Assessment Publicly Disclosed Exploited
Exploitation Less Likely No No

Affected Software

The following tables list the affected software details for the vulnerability.

CVE-2023-21548
Product KB Article Severity Impact Supercedence CVSS Score Set Restart Required
Windows 10 for 32-bit Systems 5022297 (Security Update) Critical Remote Code Execution 5021243 Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 10 for x64-based Systems 5022297 (Security Update) Critical Remote Code Execution 5021243 Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 10 Version 1607 for 32-bit Systems 5022289 (Security Update) Critical Remote Code Execution 5021235 Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 10 Version 1607 for x64-based Systems 5022289 (Security Update) Critical Remote Code Execution 5021235 Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 10 Version 1809 for 32-bit Systems 5022286 (Security Update) Critical Remote Code Execution 5021237
Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 10 Version 1809 for ARM64-based Systems 5022286 (Security Update) Critical Remote Code Execution 5021237
Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 10 Version 1809 for x64-based Systems 5022286 (Security Update) Critical Remote Code Execution 5021237
Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 10 Version 20H2 for 32-bit Systems 5022282 (Security Update) Critical Remote Code Execution 5021233
Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 10 Version 20H2 for ARM64-based Systems 5022282 (Security Update) Critical Remote Code Execution 5021233
Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 10 Version 20H2 for x64-based Systems 5022282 (Security Update) Critical Remote Code Execution 5021233
Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 10 Version 21H2 for 32-bit Systems 5022282 (Security Update) Critical Remote Code Execution
5021233
Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 10 Version 21H2 for ARM64-based Systems 5022282 (Security Update) Critical Remote Code Execution
5021233
Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 10 Version 21H2 for x64-based Systems 5022282 (Security Update) Critical Remote Code Execution
5021233
Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 10 Version 22H2 for 32-bit Systems 5022282 (Security Update) Critical Remote Code Execution
5021233
Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 10 Version 22H2 for ARM64-based Systems 5022282 (Security Update) Critical Remote Code Execution
5021233
Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 10 Version 22H2 for x64-based Systems 5022282 (Security Update) Critical Remote Code Execution
5021233
Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 11 version 21H2 for ARM64-based Systems 5022287 (Security Update) Critical Remote Code Execution 5021234 Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 11 version 21H2 for x64-based Systems 5022287 (Security Update) Critical Remote Code Execution 5021234 Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 11 Version 22H2 for ARM64-based Systems 5022303 (Security Update) Critical Remote Code Execution 5021255
Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 11 Version 22H2 for x64-based Systems 5022303 (Security Update) Critical Remote Code Execution 5021255
Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 7 for 32-bit Systems Service Pack 1 5022338 (Monthly Rollup)
5022339 (Security Only)
Critical Remote Code Execution 5021291
Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 7 for x64-based Systems Service Pack 1 5022338 (Monthly Rollup)
5022339 (Security Only)
Critical Remote Code Execution 5021291
Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 8.1 for 32-bit systems 5022352 (Monthly Rollup)
5022346 (Security Only)
Critical Remote Code Execution 5021294
Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 8.1 for x64-based systems 5022352 (Monthly Rollup)
5022346 (Security Only)
Critical Remote Code Execution 5021294
Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows RT 8.1 5022346 (Security Only) Critical Remote Code Execution Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows Server 2008 for 32-bit Systems Service Pack 2 5022340 (Monthly Rollup)
5022353 (Security Only)
Critical Remote Code Execution 5021289
Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows Server 2008 for 32-bit Systems Service Pack 2 (Server Core installation) 5022340 (Monthly Rollup)
5022353 (Security Only)
Critical Remote Code Execution 5021289
Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows Server 2008 for x64-based Systems Service Pack 2 5022340 (Monthly Rollup)
5022353 (Security Only)
Critical Remote Code Execution 5021289
Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows Server 2008 for x64-based Systems Service Pack 2 (Server Core installation) 5022340 (Monthly Rollup)
5022353 (Security Only)
Critical Remote Code Execution 5021289
Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows Server 2008 R2 for x64-based Systems Service Pack 1 5022338 (Monthly Rollup)
5022339 (Security Only)
Critical Remote Code Execution 5021291
Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation) 5022338 (Monthly Rollup)
5022339 (Security Only)
Critical Remote Code Execution 5021291
Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows Server 2012 5022348 (Monthly Rollup)
5022343 (Security Only)
Critical Remote Code Execution 5021285
Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows Server 2012 (Server Core installation) 5022348 (Monthly Rollup)
5022343 (Security Only)
Critical Remote Code Execution 5021285
Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows Server 2012 R2 5022352 (Monthly Rollup)
5022346 (Security Only)
Critical Remote Code Execution 5021294
Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows Server 2012 R2 (Server Core installation) 5022352 (Monthly Rollup)
5022346 (Security Only)
Critical Remote Code Execution 5021294
Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows Server 2016 5022289 (Security Update) Critical Remote Code Execution 5021235 Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows Server 2016 (Server Core installation) 5022289 (Security Update) Critical Remote Code Execution 5021235 Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows Server 2019 5022286 (Security Update) Critical Remote Code Execution 5021237
Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows Server 2019 (Server Core installation) 5022286 (Security Update) Critical Remote Code Execution 5021237
Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows Server 2022 5022291 (Security Update) Critical Remote Code Execution 5021249 Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows Server 2022 (Server Core installation) 5022291 (Security Update) Critical Remote Code Execution 5021249 Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes

Acknowledgements

CVE ID Acknowledgements
CVE-2023-21548 Yuki Chen with Cyber KunLun


CVE-2023-21549 - Windows SMB Witness Service Elevation of Privilege Vulnerability

(top)
CVE ID Vulnerability Description Maximum Severity Rating Vulnerability Impact
CVE-2023-21549
MITRE
NVD
CVE Title: Windows SMB Witness Service Elevation of Privilege Vulnerability
CVSS:

CVSS:3.1 8.8/7.7
Base score metrics
Attack VectorNetwork
Attack ComplexityLow
Privileges RequiredLow
User InteractionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
Temporal score metrics
Exploit Code MaturityUnproven
Remediation LevelOfficial Fix
Report ConfidenceConfirmed

FAQ:

How could an attacker exploit the vulnerability?

To exploit this vulnerability, an attacker could execute a specially crafted malicious script which executes an RPC call to an RPC host. This could result in elevation of privilege on the server.


What privileges could be gained by an attacker who successfully exploited the vulnerability?

An attacker who successfully exploited this vulnerability could execute RPC functions that are restricted to privileged accounts only.


Mitigations:
None
Workarounds:
None
Revision:
1.0    2023-01-10T08:00:00    

Information published.


Important Elevation of Privilege

Exploitability Index

The following table provides an exploitability assessment of each of the vulnerabilities addressed this month. The vulnerabilities are listed in order of bulletin ID then CVE ID. Only vulnerabilities that have a severity rating of Critical or Important in the bulletins are included.

Exploitability Assessment Publicly Disclosed Exploited
Exploitation Less Likely Yes No

Affected Software

The following tables list the affected software details for the vulnerability.

CVE-2023-21549
Product KB Article Severity Impact Supercedence CVSS Score Set Restart Required
Windows 10 for 32-bit Systems 5022297 (Security Update) Important Elevation of Privilege 5021243 Base: 8.8
Temporal: 7.7
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 10 for x64-based Systems 5022297 (Security Update) Important Elevation of Privilege 5021243 Base: 8.8
Temporal: 7.7
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 10 Version 1607 for 32-bit Systems 5022289 (Security Update) Important Elevation of Privilege 5021235 Base: 8.8
Temporal: 7.7
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 10 Version 1607 for x64-based Systems 5022289 (Security Update) Important Elevation of Privilege 5021235 Base: 8.8
Temporal: 7.7
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 10 Version 1809 for 32-bit Systems 5022286 (Security Update) Important Elevation of Privilege 5021237
Base: 8.8
Temporal: 7.7
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 10 Version 1809 for ARM64-based Systems 5022286 (Security Update) Important Elevation of Privilege 5021237
Base: 8.8
Temporal: 7.7
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 10 Version 1809 for x64-based Systems 5022286 (Security Update) Important Elevation of Privilege 5021237
Base: 8.8
Temporal: 7.7
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 10 Version 20H2 for 32-bit Systems 5022282 (Security Update) Important Elevation of Privilege 5021233
Base: 8.8
Temporal: 7.7
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 10 Version 20H2 for ARM64-based Systems 5022282 (Security Update) Important Elevation of Privilege 5021233
Base: 8.8
Temporal: 7.7
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 10 Version 20H2 for x64-based Systems 5022282 (Security Update) Important Elevation of Privilege 5021233
Base: 8.8
Temporal: 7.7
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 10 Version 21H2 for 32-bit Systems 5022282 (Security Update) Important Elevation of Privilege
5021233
Base: 8.8
Temporal: 7.7
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 10 Version 21H2 for ARM64-based Systems 5022282 (Security Update) Important Elevation of Privilege
5021233
Base: 8.8
Temporal: 7.7
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 10 Version 21H2 for x64-based Systems 5022282 (Security Update) Important Elevation of Privilege
5021233
Base: 8.8
Temporal: 7.7
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 10 Version 22H2 for 32-bit Systems 5022282 (Security Update) Important Elevation of Privilege
5021233
Base: 8.8
Temporal: 7.7
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 10 Version 22H2 for ARM64-based Systems 5022282 (Security Update) Important Elevation of Privilege
5021233
Base: 8.8
Temporal: 7.7
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 10 Version 22H2 for x64-based Systems 5022282 (Security Update) Important Elevation of Privilege
5021233
Base: 8.8
Temporal: 7.7
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 11 version 21H2 for ARM64-based Systems 5022287 (Security Update) Important Elevation of Privilege 5021234 Base: 8.8
Temporal: 7.7
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 11 version 21H2 for x64-based Systems 5022287 (Security Update) Important Elevation of Privilege 5021234 Base: 8.8
Temporal: 7.7
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 11 Version 22H2 for ARM64-based Systems 5022303 (Security Update) Important Elevation of Privilege 5021255
Base: 8.8
Temporal: 7.7
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 11 Version 22H2 for x64-based Systems 5022303 (Security Update) Important Elevation of Privilege 5021255
Base: 8.8
Temporal: 7.7
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 7 for 32-bit Systems Service Pack 1 5022338 (Monthly Rollup)
5022339 (Security Only)
Important Elevation of Privilege 5021291
Base: 8.8
Temporal: 7.7
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 8.1 for x64-based systems 5022352 (Monthly Rollup)
5022346 (Security Only)
Important Elevation of Privilege 5021294
Base: 8.8
Temporal: 7.7
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows RT 8.1 5022346 (Security Only) Important Elevation of Privilege Base: 8.8
Temporal: 7.7
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows Server 2012 5022348 (Monthly Rollup)
5022343 (Security Only)
Important Elevation of Privilege 5021285
Base: 8.8
Temporal: 7.7
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows Server 2012 (Server Core installation) 5022348 (Monthly Rollup)
5022343 (Security Only)
Important Elevation of Privilege 5021285
Base: 8.8
Temporal: 7.7
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows Server 2012 R2 5022352 (Monthly Rollup)
5022346 (Security Only)
Important Elevation of Privilege 5021294
Base: 8.8
Temporal: 7.7
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows Server 2012 R2 (Server Core installation) 5022352 (Monthly Rollup)
5022346 (Security Only)
Important Elevation of Privilege 5021294
Base: 8.8
Temporal: 7.7
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows Server 2016 5022289 (Security Update) Important Elevation of Privilege 5021235 Base: 8.8
Temporal: 7.7
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows Server 2016 (Server Core installation) 5022289 (Security Update) Important Elevation of Privilege 5021235 Base: 8.8
Temporal: 7.7
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows Server 2019 5022286 (Security Update) Important Elevation of Privilege 5021237
Base: 8.8
Temporal: 7.7
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows Server 2019 (Server Core installation) 5022286 (Security Update) Important Elevation of Privilege 5021237
Base: 8.8
Temporal: 7.7
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows Server 2022 5022291 (Security Update) Important Elevation of Privilege 5021249 Base: 8.8
Temporal: 7.7
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows Server 2022 (Server Core installation) 5022291 (Security Update) Important Elevation of Privilege 5021249 Base: 8.8
Temporal: 7.7
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes

Acknowledgements

CVE ID Acknowledgements
CVE-2023-21549 Stiv Kupchik and Ophir Harpaz with Akamai


CVE-2023-21550 - Windows Cryptographic Information Disclosure Vulnerability

(top)
CVE ID Vulnerability Description Maximum Severity Rating Vulnerability Impact
CVE-2023-21550
MITRE
NVD
CVE Title: Windows Cryptographic Information Disclosure Vulnerability
CVSS:

CVSS:3.1 5.5/4.8
Base score metrics
Attack VectorLocal
Attack ComplexityLow
Privileges RequiredLow
User InteractionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityNone
AvailabilityNone
Temporal score metrics
Exploit Code MaturityUnproven
Remediation LevelOfficial Fix
Report ConfidenceConfirmed

FAQ:

What type of information could be disclosed by this vulnerability?

The type of information that could be disclosed if an attacker successfully exploited this vulnerability is Windows cryptographic secrets.


Mitigations:
None
Workarounds:
None
Revision:
1.0    2023-01-10T08:00:00    

Information published.


Important Information Disclosure

Exploitability Index

The following table provides an exploitability assessment of each of the vulnerabilities addressed this month. The vulnerabilities are listed in order of bulletin ID then CVE ID. Only vulnerabilities that have a severity rating of Critical or Important in the bulletins are included.

Exploitability Assessment Publicly Disclosed Exploited
Exploitation Less Likely No No

Affected Software

The following tables list the affected software details for the vulnerability.

CVE-2023-21550
Product KB Article Severity Impact Supercedence CVSS Score Set Restart Required
Windows 10 Version 1809 for 32-bit Systems 5022286 (Security Update) Important Information Disclosure 5021237
Base: 5.5
Temporal: 4.8
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C
Yes
Windows 10 Version 1809 for ARM64-based Systems 5022286 (Security Update) Important Information Disclosure 5021237
Base: 5.5
Temporal: 4.8
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C
Yes
Windows 10 Version 1809 for x64-based Systems 5022286 (Security Update) Important Information Disclosure 5021237
Base: 5.5
Temporal: 4.8
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C
Yes
Windows 10 Version 20H2 for 32-bit Systems 5022282 (Security Update) Important Information Disclosure 5021233
Base: 5.5
Temporal: 4.8
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C
Yes
Windows 10 Version 20H2 for ARM64-based Systems 5022282 (Security Update) Important Information Disclosure 5021233
Base: 5.5
Temporal: 4.8
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C
Yes
Windows 10 Version 20H2 for x64-based Systems 5022282 (Security Update) Important Information Disclosure 5021233
Base: 5.5
Temporal: 4.8
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C
Yes
Windows 10 Version 21H2 for 32-bit Systems 5022282 (Security Update) Important Information Disclosure
5021233
Base: 5.5
Temporal: 4.8
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C
Yes
Windows 10 Version 21H2 for ARM64-based Systems 5022282 (Security Update) Important Information Disclosure
5021233
Base: 5.5
Temporal: 4.8
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C
Yes
Windows 10 Version 21H2 for x64-based Systems 5022282 (Security Update) Important Information Disclosure
5021233
Base: 5.5
Temporal: 4.8
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C
Yes
Windows 10 Version 22H2 for 32-bit Systems 5022282 (Security Update) Important Information Disclosure
5021233
Base: 5.5
Temporal: 4.8
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C
Yes
Windows 10 Version 22H2 for ARM64-based Systems 5022282 (Security Update) Important Information Disclosure
5021233
Base: 5.5
Temporal: 4.8
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C
Yes
Windows 10 Version 22H2 for x64-based Systems 5022282 (Security Update) Important Information Disclosure
5021233
Base: 5.5
Temporal: 4.8
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C
Yes
Windows 11 version 21H2 for ARM64-based Systems 5022287 (Security Update) Important Information Disclosure 5021234 Base: 5.5
Temporal: 4.8
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C
Yes
Windows 11 version 21H2 for x64-based Systems 5022287 (Security Update) Important Information Disclosure 5021234 Base: 5.5
Temporal: 4.8
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C
Yes
Windows 11 Version 22H2 for ARM64-based Systems 5022303 (Security Update) Important Information Disclosure 5021255
Base: 5.5
Temporal: 4.8
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C
Yes
Windows 11 Version 22H2 for x64-based Systems 5022303 (Security Update) Important Information Disclosure 5021255
Base: 5.5
Temporal: 4.8
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C
Yes
Windows Server 2019 5022286 (Security Update) Important Information Disclosure 5021237
Base: 5.5
Temporal: 4.8
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C
Yes
Windows Server 2019 (Server Core installation) 5022286 (Security Update) Important Information Disclosure 5021237
Base: 5.5
Temporal: 4.8
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C
Yes
Windows Server 2022 5022291 (Security Update) Important Information Disclosure 5021249 Base: 5.5
Temporal: 4.8
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C
Yes
Windows Server 2022 (Server Core installation) 5022291 (Security Update) Important Information Disclosure 5021249 Base: 5.5
Temporal: 4.8
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C
Yes

Acknowledgements

CVE ID Acknowledgements
CVE-2023-21550 Microsoft Offensive Research and Security Engineering (MORSE)


CVE-2023-21551 - Microsoft Cryptographic Services Elevation of Privilege Vulnerability

(top)
CVE ID Vulnerability Description Maximum Severity Rating Vulnerability Impact
CVE-2023-21551
MITRE
NVD
CVE Title: Microsoft Cryptographic Services Elevation of Privilege Vulnerability
CVSS:

CVSS:3.1 7.8/6.8
Base score metrics
Attack VectorLocal
Attack ComplexityLow
Privileges RequiredLow
User InteractionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
Temporal score metrics
Exploit Code MaturityUnproven
Remediation LevelOfficial Fix
Report ConfidenceConfirmed

FAQ:

What privileges could be gained by an attacker who successfully exploited the vulnerability?

An attacker who successfully exploited this vulnerability could gain SYSTEM privileges.


Mitigations:
None
Workarounds:
None
Revision:
1.0    2023-01-10T08:00:00    

Information published.


Critical Elevation of Privilege

Exploitability Index

The following table provides an exploitability assessment of each of the vulnerabilities addressed this month. The vulnerabilities are listed in order of bulletin ID then CVE ID. Only vulnerabilities that have a severity rating of Critical or Important in the bulletins are included.

Exploitability Assessment Publicly Disclosed Exploited
Exploitation Less Likely No No

Affected Software

The following tables list the affected software details for the vulnerability.

CVE-2023-21551
Product KB Article Severity Impact Supercedence CVSS Score Set Restart Required
Windows 10 Version 1809 for 32-bit Systems 5022286 (Security Update) Critical Elevation of Privilege 5021237
Base: 7.8
Temporal: 6.8
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 10 Version 1809 for ARM64-based Systems 5022286 (Security Update) Critical Elevation of Privilege 5021237
Base: 7.8
Temporal: 6.8
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 10 Version 1809 for x64-based Systems 5022286 (Security Update) Critical Elevation of Privilege 5021237
Base: 7.8
Temporal: 6.8
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 10 Version 20H2 for 32-bit Systems 5022282 (Security Update) Critical Elevation of Privilege 5021233
Base: 7.8
Temporal: 6.8
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 10 Version 20H2 for ARM64-based Systems 5022282 (Security Update) Critical Elevation of Privilege 5021233
Base: 7.8
Temporal: 6.8
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 10 Version 20H2 for x64-based Systems 5022282 (Security Update) Critical Elevation of Privilege 5021233
Base: 7.8
Temporal: 6.8
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 10 Version 21H2 for 32-bit Systems 5022282 (Security Update) Critical Elevation of Privilege
5021233
Base: 7.8
Temporal: 6.8
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 10 Version 21H2 for ARM64-based Systems 5022282 (Security Update) Critical Elevation of Privilege
5021233
Base: 7.8
Temporal: 6.8
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 10 Version 21H2 for x64-based Systems 5022282 (Security Update) Critical Elevation of Privilege
5021233
Base: 7.8
Temporal: 6.8
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 10 Version 22H2 for 32-bit Systems 5022282 (Security Update) Critical Elevation of Privilege
5021233
Base: 7.8
Temporal: 6.8
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 10 Version 22H2 for ARM64-based Systems 5022282 (Security Update) Critical Elevation of Privilege
5021233
Base: 7.8
Temporal: 6.8
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 10 Version 22H2 for x64-based Systems 5022282 (Security Update) Critical Elevation of Privilege
5021233
Base: 7.8
Temporal: 6.8
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 11 version 21H2 for ARM64-based Systems 5022287 (Security Update) Critical Elevation of Privilege 5021234 Base: 7.8
Temporal: 6.8
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 11 version 21H2 for x64-based Systems 5022287 (Security Update) Critical Elevation of Privilege 5021234 Base: 7.8
Temporal: 6.8
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 11 Version 22H2 for ARM64-based Systems 5022303 (Security Update) Critical Elevation of Privilege 5021255
Base: 7.8
Temporal: 6.8
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 11 Version 22H2 for x64-based Systems 5022303 (Security Update) Critical Elevation of Privilege 5021255
Base: 7.8
Temporal: 6.8
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows Server 2019 5022286 (Security Update) Critical Elevation of Privilege 5021237
Base: 7.8
Temporal: 6.8
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows Server 2019 (Server Core installation) 5022286 (Security Update) Critical Elevation of Privilege 5021237
Base: 7.8
Temporal: 6.8
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows Server 2022 5022291 (Security Update) Critical Elevation of Privilege 5021249 Base: 7.8
Temporal: 6.8
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows Server 2022 (Server Core installation) 5022291 (Security Update) Critical Elevation of Privilege 5021249 Base: 7.8
Temporal: 6.8
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes

Acknowledgements

CVE ID Acknowledgements
CVE-2023-21551 Microsoft Offensive Research and Security Engineering (MORSE)


CVE-2023-21552 - Windows GDI Elevation of Privilege Vulnerability

(top)
CVE ID Vulnerability Description Maximum Severity Rating Vulnerability Impact
CVE-2023-21552
MITRE
NVD
CVE Title: Windows GDI Elevation of Privilege Vulnerability
CVSS:

CVSS:3.1 7.8/7.0
Base score metrics
Attack VectorLocal
Attack ComplexityLow
Privileges RequiredLow
User InteractionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
Temporal score metrics
Exploit Code MaturityProof-of-Concept
Remediation LevelOfficial Fix
Report ConfidenceConfirmed

FAQ:

What privileges could be gained by an attacker who successfully exploited the vulnerability?

An attacker who successfully exploited this vulnerability could gain SYSTEM privileges.


Mitigations:
None
Workarounds:
None
Revision:
1.0    2023-01-10T08:00:00    

Information published.


Important Elevation of Privilege

Exploitability Index

The following table provides an exploitability assessment of each of the vulnerabilities addressed this month. The vulnerabilities are listed in order of bulletin ID then CVE ID. Only vulnerabilities that have a severity rating of Critical or Important in the bulletins are included.

Exploitability Assessment Publicly Disclosed Exploited
Exploitation More Likely No No

Affected Software

The following tables list the affected software details for the vulnerability.

CVE-2023-21552
Product KB Article Severity Impact Supercedence CVSS Score Set Restart Required
Windows 10 for 32-bit Systems 5022297 (Security Update) Important Elevation of Privilege 5021243 Base: 7.8
Temporal: 7.0
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C
Yes
Windows 10 for x64-based Systems 5022297 (Security Update) Important Elevation of Privilege 5021243 Base: 7.8
Temporal: 7.0
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C
Yes
Windows 10 Version 1607 for 32-bit Systems 5022289 (Security Update) Important Elevation of Privilege 5021235 Base: 7.8
Temporal: 7.0
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C
Yes
Windows 10 Version 1607 for x64-based Systems 5022289 (Security Update) Important Elevation of Privilege 5021235 Base: 7.8
Temporal: 7.0
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C
Yes
Windows 10 Version 1809 for 32-bit Systems 5022286 (Security Update) Important Elevation of Privilege 5021237
Base: 7.8
Temporal: 7.0
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C
Yes
Windows 10 Version 1809 for ARM64-based Systems 5022286 (Security Update) Important Elevation of Privilege 5021237
Base: 7.8
Temporal: 7.0
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C
Yes
Windows 10 Version 1809 for x64-based Systems 5022286 (Security Update) Important Elevation of Privilege 5021237
Base: 7.8
Temporal: 7.0
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C
Yes
Windows 10 Version 20H2 for 32-bit Systems 5022282 (Security Update) Important Elevation of Privilege 5021233
Base: 7.8
Temporal: 7.0
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C
Yes
Windows 10 Version 20H2 for ARM64-based Systems 5022282 (Security Update) Important Elevation of Privilege 5021233
Base: 7.8
Temporal: 7.0
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C
Yes
Windows 10 Version 20H2 for x64-based Systems 5022282 (Security Update) Important Elevation of Privilege 5021233
Base: 7.8
Temporal: 7.0
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C
Yes
Windows 10 Version 21H2 for 32-bit Systems 5022282 (Security Update) Important Elevation of Privilege
5021233
Base: 7.8
Temporal: 7.0
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C
Yes
Windows 10 Version 21H2 for ARM64-based Systems 5022282 (Security Update) Important Elevation of Privilege
5021233
Base: 7.8
Temporal: 7.0
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C
Yes
Windows 10 Version 21H2 for x64-based Systems 5022282 (Security Update) Important Elevation of Privilege
5021233
Base: 7.8
Temporal: 7.0
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C
Yes
Windows 10 Version 22H2 for 32-bit Systems 5022282 (Security Update) Important Elevation of Privilege
5021233
Base: 7.8
Temporal: 7.0
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C
Yes
Windows 10 Version 22H2 for ARM64-based Systems 5022282 (Security Update) Important Elevation of Privilege
5021233
Base: 7.8
Temporal: 7.0
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C
Yes
Windows 10 Version 22H2 for x64-based Systems 5022282 (Security Update) Important Elevation of Privilege
5021233
Base: 7.8
Temporal: 7.0
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C
Yes
Windows 11 version 21H2 for ARM64-based Systems 5022287 (Security Update) Important Elevation of Privilege 5021234 Base: 7.8
Temporal: 7.0
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C
Yes
Windows 11 version 21H2 for x64-based Systems 5022287 (Security Update) Important Elevation of Privilege 5021234 Base: 7.8
Temporal: 7.0
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C
Yes
Windows 11 Version 22H2 for ARM64-based Systems 5022303 (Security Update) Important Elevation of Privilege 5021255
Base: 7.8
Temporal: 7.0
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C
Yes
Windows 11 Version 22H2 for x64-based Systems 5022303 (Security Update) Important Elevation of Privilege 5021255
Base: 7.8
Temporal: 7.0
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C
Yes
Windows 7 for 32-bit Systems Service Pack 1 5022338 (Monthly Rollup)
5022339 (Security Only)
Important Elevation of Privilege 5021291
Base: 7.8
Temporal: 7.0
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C
Yes
Windows 7 for x64-based Systems Service Pack 1 5022338 (Monthly Rollup)
5022339 (Security Only)
Important Elevation of Privilege 5021291
Base: 7.8
Temporal: 7.0
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C
Yes
Windows 8.1 for 32-bit systems 5022352 (Monthly Rollup)
5022346 (Security Only)
Important Elevation of Privilege 5021294
Base: 7.8
Temporal: 7.0
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C
Yes
Windows 8.1 for x64-based systems 5022352 (Monthly Rollup)
5022346 (Security Only)
Important Elevation of Privilege 5021294
Base: 7.8
Temporal: 7.0
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C
Yes
Windows RT 8.1 5022346 (Security Only) Important Elevation of Privilege Base: 7.8
Temporal: 7.0
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C
Yes
Windows Server 2008 for 32-bit Systems Service Pack 2 5022340 (Monthly Rollup)
5022353 (Security Only)
Important Elevation of Privilege 5021289
Base: 7.8
Temporal: 7.0
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C
Yes
Windows Server 2008 for 32-bit Systems Service Pack 2 (Server Core installation) 5022340 (Monthly Rollup)
5022353 (Security Only)
Important Elevation of Privilege 5021289
Base: 7.8
Temporal: 7.0
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C
Yes
Windows Server 2008 for x64-based Systems Service Pack 2 5022340 (Monthly Rollup)
5022353 (Security Only)
Important Elevation of Privilege 5021289
Base: 7.8
Temporal: 7.0
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C
Yes
Windows Server 2008 for x64-based Systems Service Pack 2 (Server Core installation) 5022340 (Monthly Rollup)
5022353 (Security Only)
Important Elevation of Privilege 5021289
Base: 7.8
Temporal: 7.0
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C
Yes
Windows Server 2008 R2 for x64-based Systems Service Pack 1 5022338 (Monthly Rollup)
5022339 (Security Only)
Important Elevation of Privilege 5021291
Base: 7.8
Temporal: 7.0
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C
Yes
Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation) 5022338 (Monthly Rollup)
5022339 (Security Only)
Important Elevation of Privilege 5021291
Base: 7.8
Temporal: 7.0
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C
Yes
Windows Server 2012 5022348 (Monthly Rollup)
5022343 (Security Only)
Important Elevation of Privilege 5021285
Base: 7.8
Temporal: 7.0
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C
Yes
Windows Server 2012 (Server Core installation) 5022348 (Monthly Rollup)
5022343 (Security Only)
Important Elevation of Privilege 5021285
Base: 7.8
Temporal: 7.0
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C
Yes
Windows Server 2012 R2 5022352 (Monthly Rollup)
5022346 (Security Only)
Important Elevation of Privilege 5021294
Base: 7.8
Temporal: 7.0
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C
Yes
Windows Server 2012 R2 (Server Core installation) 5022352 (Monthly Rollup)
5022346 (Security Only)
Important Elevation of Privilege 5021294
Base: 7.8
Temporal: 7.0
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C
Yes
Windows Server 2016 5022289 (Security Update) Important Elevation of Privilege 5021235 Base: 7.8
Temporal: 7.0
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C
Yes
Windows Server 2016 (Server Core installation) 5022289 (Security Update) Important Elevation of Privilege 5021235 Base: 7.8
Temporal: 7.0
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C
Yes
Windows Server 2019 5022286 (Security Update) Important Elevation of Privilege 5021237
Base: 7.8
Temporal: 7.0
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C
Yes
Windows Server 2019 (Server Core installation) 5022286 (Security Update) Important Elevation of Privilege 5021237
Base: 7.8
Temporal: 7.0
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C
Yes
Windows Server 2022 5022291 (Security Update) Important Elevation of Privilege 5021249 Base: 7.8
Temporal: 7.0
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C
Yes
Windows Server 2022 (Server Core installation) 5022291 (Security Update) Important Elevation of Privilege 5021249 Base: 7.8
Temporal: 7.0
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C
Yes

Acknowledgements

CVE ID Acknowledgements
CVE-2023-21552 luckyu with NSFOCUS TIANYUAN LAB


CVE-2023-21555 - Windows Layer 2 Tunneling Protocol (L2TP) Remote Code Execution Vulnerability

(top)
CVE ID Vulnerability Description Maximum Severity Rating Vulnerability Impact
CVE-2023-21555
MITRE
NVD
CVE Title: Windows Layer 2 Tunneling Protocol (L2TP) Remote Code Execution Vulnerability
CVSS:

CVSS:3.1 8.1/7.1
Base score metrics
Attack VectorNetwork
Attack ComplexityHigh
Privileges RequiredNone
User InteractionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
Temporal score metrics
Exploit Code MaturityUnproven
Remediation LevelOfficial Fix
Report ConfidenceConfirmed

FAQ:

According to the CVSS metric, the attack complexity is high (AC:H). What does that mean for this vulnerability?

Successful exploitation of this vulnerability requires an attacker to win a race condition.


How could an attacker exploit this vulnerability?

An unauthenticated attacker could send a specially crafted connection request to a RAS server, which could lead to remote code execution (RCE) on the RAS server machine.


Mitigations:
None
Workarounds:
None
Revision:
1.0    2023-01-10T08:00:00    

Information published.


Critical Remote Code Execution

Exploitability Index

The following table provides an exploitability assessment of each of the vulnerabilities addressed this month. The vulnerabilities are listed in order of bulletin ID then CVE ID. Only vulnerabilities that have a severity rating of Critical or Important in the bulletins are included.

Exploitability Assessment Publicly Disclosed Exploited
Exploitation Less Likely No No

Affected Software

The following tables list the affected software details for the vulnerability.

CVE-2023-21555
Product KB Article Severity Impact Supercedence CVSS Score Set Restart Required
Windows 10 for 32-bit Systems 5022297 (Security Update) Critical Remote Code Execution 5021243 Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 10 for x64-based Systems 5022297 (Security Update) Critical Remote Code Execution 5021243 Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 10 Version 1607 for 32-bit Systems 5022289 (Security Update) Critical Remote Code Execution 5021235 Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 10 Version 1607 for x64-based Systems 5022289 (Security Update) Critical Remote Code Execution 5021235 Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 10 Version 1809 for 32-bit Systems 5022286 (Security Update) Critical Remote Code Execution 5021237
Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 10 Version 1809 for ARM64-based Systems 5022286 (Security Update) Critical Remote Code Execution 5021237
Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 10 Version 1809 for x64-based Systems 5022286 (Security Update) Critical Remote Code Execution 5021237
Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 10 Version 20H2 for 32-bit Systems 5022282 (Security Update) Critical Remote Code Execution 5021233
Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 10 Version 20H2 for ARM64-based Systems 5022282 (Security Update) Critical Remote Code Execution 5021233
Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 10 Version 20H2 for x64-based Systems 5022282 (Security Update) Critical Remote Code Execution 5021233
Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 10 Version 21H2 for 32-bit Systems 5022282 (Security Update) Critical Remote Code Execution
5021233
Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 10 Version 21H2 for ARM64-based Systems 5022282 (Security Update) Critical Remote Code Execution
5021233
Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 10 Version 21H2 for x64-based Systems 5022282 (Security Update) Critical Remote Code Execution
5021233
Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 10 Version 22H2 for 32-bit Systems 5022282 (Security Update) Critical Remote Code Execution
5021233
Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 10 Version 22H2 for ARM64-based Systems 5022282 (Security Update) Critical Remote Code Execution
5021233
Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 10 Version 22H2 for x64-based Systems 5022282 (Security Update) Critical Remote Code Execution
5021233
Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 11 version 21H2 for ARM64-based Systems 5022287 (Security Update) Critical Remote Code Execution 5021234 Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 11 version 21H2 for x64-based Systems 5022287 (Security Update) Critical Remote Code Execution 5021234 Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 11 Version 22H2 for ARM64-based Systems 5022303 (Security Update) Critical Remote Code Execution 5021255
Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 11 Version 22H2 for x64-based Systems 5022303 (Security Update) Critical Remote Code Execution 5021255
Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 7 for 32-bit Systems Service Pack 1 5022338 (Monthly Rollup)
5022339 (Security Only)
Critical Remote Code Execution 5021291
Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 7 for x64-based Systems Service Pack 1 5022338 (Monthly Rollup)
5022339 (Security Only)
Critical Remote Code Execution 5021291
Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 8.1 for 32-bit systems 5022352 (Monthly Rollup)
5022346 (Security Only)
Critical Remote Code Execution 5021294
Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 8.1 for x64-based systems 5022352 (Monthly Rollup)
5022346 (Security Only)
Critical Remote Code Execution 5021294
Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows RT 8.1 5022346 (Security Only) Critical Remote Code Execution Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows Server 2008 for 32-bit Systems Service Pack 2 5022340 (Monthly Rollup)
5022353 (Security Only)
Critical Remote Code Execution 5021289
Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows Server 2008 for 32-bit Systems Service Pack 2 (Server Core installation) 5022340 (Monthly Rollup)
5022353 (Security Only)
Critical Remote Code Execution 5021289
Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows Server 2008 for x64-based Systems Service Pack 2 5022340 (Monthly Rollup)
5022353 (Security Only)
Critical Remote Code Execution 5021289
Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows Server 2008 for x64-based Systems Service Pack 2 (Server Core installation) 5022340 (Monthly Rollup)
5022353 (Security Only)
Critical Remote Code Execution 5021289
Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows Server 2008 R2 for x64-based Systems Service Pack 1 5022338 (Monthly Rollup)
5022339 (Security Only)
Critical Remote Code Execution 5021291
Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation) 5022338 (Monthly Rollup)
5022339 (Security Only)
Critical Remote Code Execution 5021291
Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows Server 2012 5022348 (Monthly Rollup)
5022343 (Security Only)
Critical Remote Code Execution 5021285
Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows Server 2012 (Server Core installation) 5022348 (Monthly Rollup)
5022343 (Security Only)
Critical Remote Code Execution 5021285
Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows Server 2012 R2 5022352 (Monthly Rollup)
5022346 (Security Only)
Critical Remote Code Execution 5021294
Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows Server 2012 R2 (Server Core installation) 5022352 (Monthly Rollup)
5022346 (Security Only)
Critical Remote Code Execution 5021294
Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows Server 2016 5022289 (Security Update) Critical Remote Code Execution 5021235 Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows Server 2016 (Server Core installation) 5022289 (Security Update) Critical Remote Code Execution 5021235 Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows Server 2019 5022286 (Security Update) Critical Remote Code Execution 5021237
Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows Server 2019 (Server Core installation) 5022286 (Security Update) Critical Remote Code Execution 5021237
Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows Server 2022 5022291 (Security Update) Critical Remote Code Execution 5021249 Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows Server 2022 (Server Core installation) 5022291 (Security Update) Critical Remote Code Execution 5021249 Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes

Acknowledgements

CVE ID Acknowledgements
CVE-2023-21555 Yuki Chen with Cyber KunLun


CVE-2023-21556 - Windows Layer 2 Tunneling Protocol (L2TP) Remote Code Execution Vulnerability

(top)
CVE ID Vulnerability Description Maximum Severity Rating Vulnerability Impact
CVE-2023-21556
MITRE
NVD
CVE Title: Windows Layer 2 Tunneling Protocol (L2TP) Remote Code Execution Vulnerability
CVSS:

CVSS:3.1 8.1/7.1
Base score metrics
Attack VectorNetwork
Attack ComplexityHigh
Privileges RequiredNone
User InteractionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
Temporal score metrics
Exploit Code MaturityUnproven
Remediation LevelOfficial Fix
Report ConfidenceConfirmed

FAQ:

According to the CVSS metric, the attack complexity is high (AC:H). What does that mean for this vulnerability?

Successful exploitation of this vulnerability requires an attacker to win a race condition.


How could an attacker exploit this vulnerability?

An unauthenticated attacker could send a specially crafted connection request to a RAS server, which could lead to remote code execution (RCE) on the RAS server machine.


Mitigations:
None
Workarounds:
None
Revision:
1.0    2023-01-10T08:00:00    

Information published.


Critical Remote Code Execution

Exploitability Index

The following table provides an exploitability assessment of each of the vulnerabilities addressed this month. The vulnerabilities are listed in order of bulletin ID then CVE ID. Only vulnerabilities that have a severity rating of Critical or Important in the bulletins are included.

Exploitability Assessment Publicly Disclosed Exploited
Exploitation Less Likely No No

Affected Software

The following tables list the affected software details for the vulnerability.

CVE-2023-21556
Product KB Article Severity Impact Supercedence CVSS Score Set Restart Required
Windows 10 for 32-bit Systems 5022297 (Security Update) Critical Remote Code Execution 5021243 Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 10 for x64-based Systems 5022297 (Security Update) Critical Remote Code Execution 5021243 Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 10 Version 1607 for 32-bit Systems 5022289 (Security Update) Critical Remote Code Execution 5021235 Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 10 Version 1607 for x64-based Systems 5022289 (Security Update) Critical Remote Code Execution 5021235 Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 10 Version 1809 for 32-bit Systems 5022286 (Security Update) Critical Remote Code Execution 5021237
Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 10 Version 1809 for ARM64-based Systems 5022286 (Security Update) Critical Remote Code Execution 5021237
Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 10 Version 1809 for x64-based Systems 5022286 (Security Update) Critical Remote Code Execution 5021237
Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 10 Version 20H2 for 32-bit Systems 5022282 (Security Update) Critical Remote Code Execution 5021233
Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 10 Version 20H2 for ARM64-based Systems 5022282 (Security Update) Critical Remote Code Execution 5021233
Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 10 Version 20H2 for x64-based Systems 5022282 (Security Update) Critical Remote Code Execution 5021233
Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 10 Version 21H2 for 32-bit Systems 5022282 (Security Update) Critical Remote Code Execution
5021233
Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 10 Version 21H2 for ARM64-based Systems 5022282 (Security Update) Critical Remote Code Execution
5021233
Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 10 Version 21H2 for x64-based Systems 5022282 (Security Update) Critical Remote Code Execution
5021233
Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 10 Version 22H2 for 32-bit Systems 5022282 (Security Update) Critical Remote Code Execution
5021233
Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 10 Version 22H2 for ARM64-based Systems 5022282 (Security Update) Critical Remote Code Execution
5021233
Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 10 Version 22H2 for x64-based Systems 5022282 (Security Update) Critical Remote Code Execution
5021233
Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 11 version 21H2 for ARM64-based Systems 5022287 (Security Update) Critical Remote Code Execution 5021234 Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 11 version 21H2 for x64-based Systems 5022287 (Security Update) Critical Remote Code Execution 5021234 Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 11 Version 22H2 for ARM64-based Systems 5022303 (Security Update) Critical Remote Code Execution 5021255
Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 11 Version 22H2 for x64-based Systems 5022303 (Security Update) Critical Remote Code Execution 5021255
Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 7 for 32-bit Systems Service Pack 1 5022338 (Monthly Rollup)
5022339 (Security Only)
Critical Remote Code Execution 5021291
Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 7 for x64-based Systems Service Pack 1 5022338 (Monthly Rollup)
5022339 (Security Only)
Critical Remote Code Execution 5021291
Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 8.1 for 32-bit systems 5022352 (Monthly Rollup)
5022346 (Security Only)
Critical Remote Code Execution 5021294
Base: 8.1
Temporal: 7.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Yes
Windows 8.1 for x64-based systems 5022352 (Monthly Rollup)
5022346 (Security Only)
Critical Remote Code Execution 502129