A denial of service vulnerability exists in Windows Remote Desktop Service when an attacker connects to the target system using RDP and sends specially crafted requests. An attacker who successfully exploited this vulnerability could cause the Remote Desktop Service on the target system to stop responding.

To exploit this vulnerability, an attacker would need to run a specially crafted application against a server which provides Remote Desktop Service.

The update addresses the vulnerability by correcting how Remote Desktop Service handles connection requests.

Information published.

An elevation of privilege vulnerability exists when the Windows Application Compatibility Client Library improperly handles registry operations. An attacker who successfully exploited this vulnerability could gain elevated privileges.

To exploit the vulnerability, an attacker would first need code execution on a victim system. An attacker could then run a specially crafted application.

The security update addresses the vulnerability by ensuring the Windows Application Compatibility Client Library properly handles registry operations.

Information published.

An elevation of privilege vulnerability exists when Microsoft Windows improperly handles reparse points. An attacker who successfully exploited this vulnerability could overwrite or delete a targeted file that would normally require elevated permissions.

To exploit this vulnerability, an attacker would first have to log on to the system. An attacker could then run a specially crafted application that could exploit the vulnerability and overwrite or delete files.

The security update addresses the vulnerability by correcting how Windows handles reparse points.

Information published.

An information disclosure vulnerability exists when the Windows KernelStream improperly handles objects in memory. An attacker who successfully exploited this vulnerability could obtain information to further compromise the user’s system.

To exploit this vulnerability, an attacker would have to log on to an affected system and run a specially crafted application. The vulnerability would not allow an attacker to execute code or to elevate user rights directly, but it could be used to obtain information that could be used to try to further compromise the affected system.

The update addresses the vulnerability by correcting how the Windows KernelStream handles objects in memory.

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 uninitialized memory.

Information published.

An elevation of privilege vulnerability exists when the Windows kernel fails to properly handle objects in memory. An attacker who successfully exploited this vulnerability could run arbitrary code in kernel mode. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights.

To exploit this vulnerability, an attacker would first have to log on to the system. An attacker could then run a specially crafted application to take control of an affected system.

The update addresses the vulnerability by correcting how the Windows kernel handles objects in memory.

Information published.

A remote code execution vulnerability exists when Windows Hyper-V on a host server fails to properly validate input from an authenticated user on a guest operating system. To exploit the vulnerability, an attacker could run a specially crafted application on a guest operating system that could cause the Hyper-V host operating system to execute arbitrary code.

An attacker who successfully exploited the vulnerability could execute arbitrary code on the host operating system.

The security update addresses the vulnerability by correcting how Hyper-V validates guest operating system user input.

Information published.

An elevation of privilege vulnerability exists in the way that the Windows kernel image handles objects in memory. An attacker who successfully exploited the vulnerability could execute code with elevated permissions.

To exploit the vulnerability, a locally authenticated attacker could run a specially crafted application.

The security update addresses the vulnerability by ensuring the Windows kernel image properly handles objects in memory.

Information published.

A remote code execution vulnerability exists when Windows Network Address Translation (NAT) fails to properly handle UDP traffic. To exploit the vulnerability, an attacker could run a specially crafted application on a guest operating system.

An attacker who successfully exploited the vulnerability could cause memory corruption on a host operating system.

The security update addresses the vulnerability by correcting how Windows NAT handles objects in memory.

Information published.

An elevation of privilege vulnerability exists when Windows Error Reporting manager improperly handles a process crash. An attacker who successfully exploited this vulnerability could delete a targeted file leading to an elevated status.

To exploit this vulnerability, an attacker would first have to log on to the system. An attacker could then run a specially crafted application that could exploit the vulnerability and take control of an affected system.

The security update addresses the vulnerability by correcting how Windows Error Reporting manager handles process crashes.

Information published.

An information disclosure vulnerability exists in Remote Desktop Protocol (RDP) when an attacker connects to the target system using RDP and sends specially crafted requests. An attacker who successfully exploited this vulnerability could obtain information to further compromise the user’s system.

To exploit this vulnerability, an attacker would need to run a specially crafted application against a server which provides Remote Desktop Protocol (RDP) services.

The update addresses the vulnerability by correcting how RDP handles connection requests.

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 unauthorized read access to Windows RDP server process.

The following workaround may be helpful in your situation. In all cases, Microsoft strongly recommends that you install the updates for this vulnerability as soon as possible even if you plan to leave these workarounds in place:

1. Enable Network Level Authentication (NLA)

You can enable Network Level Authentication to block unauthenticated attackers from exploiting this vulnerability. With NLA turned on, an attacker would first need to authenticate to Remote Desktop Services using a valid account on the target system before the attacker could exploit the vulnerability.

2. Block TCP port 3389 at the enterprise perimeter firewall

TCP port 3389 is used to initiate a connection with the affected component. Blocking this port at the network perimeter firewall will help protect systems that are behind that firewall from attempts to exploit this vulnerability. This can help protect networks from attacks that originate outside the enterprise perimeter. Blocking the affected ports at the enterprise perimeter is the best defense to help avoid Internet-based attacks. However, systems could still be vulnerable to attacks from within their enterprise perimeter.

Information published.

An information disclosure vulnerability exists when NetBIOS over TCP (NBT) Extensions (NetBT) improperly handle objects in memory. An attacker who successfully exploited this vulnerability could obtain information to further compromise the user’s system.

To exploit this vulnerability, an attacker would have run a specially crafted application. The vulnerability would not allow an attacker to execute code or to elevate user rights directly, but it could be used to obtain information that could be used to try to further compromise the affected system.

The update addresses the vulnerability by correcting how a NetBT handles objects in memory.

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 the contents of Kernel memory. An attacker could read the contents of Kernel memory from a user mode process.

Information published.

An elevation of privilege vulnerability exists in the way Azure Functions validate access keys.

An unauthenticated attacker who successfully exploited this vulnerability could invoke an HTTP Function without proper authorization.

This security update addresses the vulnerability by correctly validating access keys used to access HTTP Functions.

How do I get the Azure Functions update?

Re-start your Azure Functions app to get the latest version with the security update.

Information published.

A remote code execution vulnerability exists when the Base3D rendering engine improperly handles memory.

An attacker who successfully exploited the vulnerability would gain execution on a victim system.

The security update addresses the vulnerability by correcting how the Base3D rendering engine handles memory.

Is the Preview Pane an attack vector for this vulnerability?

No, the Preview Pane is not an attack vector.

Information published.

An information disclosure vulnerability exists when the Windows Enterprise App Management Service improperly handles certain file operations. An attacker who successfully exploited this vulnerability could read arbitrary files.

An attacker with unprivileged access to a vulnerable system could exploit this vulnerability.

The security update addresses the vulnerability by ensuring the Windows Enterprise App Management Service properly handles file operations.

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 unauthorized file system access - reading from the file system.

Information published.

An elevation of privilege vulnerability exists when the Windows Application Compatibility Client Library improperly handles registry operations. An attacker who successfully exploited this vulnerability could gain elevated privileges.

To exploit the vulnerability, an attacker would first need code execution on a victim system. An attacker could then run a specially crafted application.

The security update addresses the vulnerability by ensuring the Windows Application Compatibility Client Library properly handles registry operations.

Information published.

An information disclosure vulnerability exists in Text Services Framework when it fails to properly handle objects in memory. An attacker who successfully exploited this vulnerability could potentially read data that was not intended to be disclosed. Note that this vulnerability would not allow an attacker to execute code or to elevate their user rights directly, but it could be used to obtain information that could be used to try to further compromise the affected system.

To exploit this vulnerability, an attacker would have to log on to an affected system and open a specially crafted file.

The update addresses the vulnerability by correcting how Text Services Framework handles objects in memory.

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 uninitialized memory.

Information published.

A spoofing vulnerability exists when Windows incorrectly validates file signatures. An attacker who successfully exploited this vulnerability could bypass security features and load improperly signed files.

In an attack scenario, an attacker could bypass security features intended to prevent improperly signed files from being loaded.

The update addresses the vulnerability by correcting how Windows validates file signatures.

Information published.

A remote code execution vulnerability exists in the way that Microsoft Graphics Components handle objects in memory. An attacker who successfully exploited the vulnerability could execute arbitrary code on a target system.

To exploit the vulnerability, a user would have to open a specially crafted file.

The security update addresses the vulnerability by correcting how Microsoft Graphics Components handle objects in memory.

Information published.