KLA12239 PE vulnerability in Microsoft Windows

An elevation of privilege vulnerability was found in Microsoft Windows. Malicious users can exploit this vulnerability to gain privileges.

Original advisories

CVE-2021-36934

Exploitation

Public exploits exist for this vulnerability.

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

Related products

Microsoft-Windows-Server

Microsoft-Windows-10

CVE list

CVE-2021-36934 critical

KB list

5005031

5005033

5005030

Solution

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

Impacts

• ACE

Arbitrary code execution. Exploitation of vulnerabilities with this impact can lead to executing by abuser any code or commands at vulnerable machine or process.

• SB

Security bypass. Exploitation of vulnerabilities with this impact can lead to performing actions restricted by current security settings.

• PE

Privilege escalation. Exploitation of vulnerabilities with this impact can lead to performing by abuser actions, which are normally disallowed for current role.

Affected Products

• Windows 10 Version 1909 for x64-based SystemsWindows Server, version 2004 (Server Core installation)Windows 10 Version 21H1 for x64-based SystemsWindows Server 2019 (Server Core installation)Windows 10 Version 1809 for ARM64-based SystemsWindows 10 Version 20H2 for x64-based SystemsWindows 10 Version 21H1 for 32-bit SystemsWindows 10 Version 1809 for x64-based SystemsWindows 10 Version 20H2 for ARM64-based SystemsWindows 10 Version 2004 for ARM64-based SystemsWindows 10 Version 1909 for ARM64-based SystemsWindows 10 Version 2004 for 32-bit SystemsWindows Server 2019Windows 10 Version 1909 for 32-bit SystemsWindows 10 Version 2004 for x64-based SystemsWindows 10 Version 21H1 for ARM64-based SystemsWindows 10 Version 20H2 for 32-bit SystemsWindows 10 Version 1809 for 32-bit Systems