KLA12075
Multiple vulnerabilities in Microsoft Products (ESU)

Multiple vulnerabilities were found in Microsoft Products (Extended Support Update). Malicious users can exploit these vulnerabilities to cause denial of service, gain privileges, execute arbitrary code, obtain sensitive information.

Below is a complete list of vulnerabilities:

1. A denial of service vulnerability in Windows Trust Verification API can be exploited remotely to cause denial of service.
2. An elevation of privilege vulnerability in Windows Event Tracing can be exploited remotely to gain privileges.
3. A remote code execution vulnerability in Windows Address Book can be exploited remotely to execute arbitrary code.
4. A remote code execution vulnerability in Windows Fax Service can be exploited remotely to execute arbitrary code.
5. A remote code execution vulnerability in Windows TCP/IP can be exploited remotely to execute arbitrary code.
6. A remote code execution vulnerability in Windows Local Spooler can be exploited remotely to execute arbitrary code.
7. An information disclosure vulnerability in Windows Remote Procedure Call can be exploited remotely to obtain sensitive information.
8. An elevation of privilege vulnerability in Windows PKU2U can be exploited remotely to gain privileges.
9. An elevation of privilege vulnerability in Windows Installer can be exploited remotely to gain privileges.
10. A denial of service vulnerability in Windows TCP/IP can be exploited remotely to cause denial of service.
11. A remote code execution vulnerability in Windows DNS Server can be exploited remotely to execute arbitrary code.

The following public exploits exists for this vulnerability:

https://github.com/lisinan988/CVE-2021-24086-exp

https://github.com/klinix5/CVE-2021-1727

Malware exists for this vulnerability. Usually such malware is classified as Exploit. More details.

Windows 10 Version 1909 for ARM64-based Systems
Windows Server 2008 for x64-based Systems Service Pack 2 (Server Core installation)
Windows Server 2012
Windows 10 Version 1809 for x64-based Systems
Windows Server 2008 for x64-based Systems Service Pack 2
Windows 10 Version 20H2 for ARM64-based Systems
Windows Server, version 2004 (Server Core installation)
Windows 10 Version 1607 for 32-bit Systems
Windows 10 Version 1803 for 32-bit Systems
Windows Server 2008 for 32-bit Systems Service Pack 2
Windows Server 2008 R2 for x64-based Systems Service Pack 1
Windows Server 2008 for 32-bit Systems Service Pack 2 (Server Core installation)
Windows 10 Version 1909 for 32-bit Systems
Windows Server, version 20H2 (Server Core Installation)
Windows 10 Version 1803 for x64-based Systems
Windows 10 Version 2004 for 32-bit Systems
Windows 10 Version 2004 for ARM64-based Systems
Windows 7 for x64-based Systems Service Pack 1
Windows Server 2019
Windows RT 8.1
Windows 10 Version 2004 for x64-based Systems
Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation)
Windows Server, version 1909 (Server Core installation)
Windows Server 2016
Windows 10 Version 1809 for 32-bit Systems
Windows 8.1 for x64-based systems
Windows Server 2012 R2 (Server Core installation)
Windows 10 Version 1809 for ARM64-based Systems
Windows 10 Version 1803 for ARM64-based Systems
Windows Server 2016 (Server Core installation)
Windows Server 2012 R2
Windows 10 Version 1607 for x64-based Systems
Windows 7 for 32-bit Systems Service Pack 1
Windows 10 Version 20H2 for 32-bit Systems
Windows 10 for 32-bit Systems
Windows 10 Version 20H2 for x64-based Systems
Windows Server 2012 (Server Core installation)
Windows 10 for x64-based Systems
Windows Server 2019 (Server Core installation)
Windows 8.1 for 32-bit systems
Windows 10 Version 1909 for x64-based Systems

Install necessary updates from the KB section, that are listed in your Windows Update (Windows Update usually can be accessed from the Control Panel)

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