CVE-2021-43238 : Security Advisory and Response

Windows Remote Access Elevation of Privilege Vulnerability was published on 2021-12-15. This CVE affects various Microsoft Windows systems and versions.

Understanding CVE-2021-43238

This vulnerability allows attackers to gain elevated privileges on affected systems.

What is CVE-2021-43238?

The CVE-2021-43238 is categorized as an Elevation of Privilege vulnerability, allowing attackers to escalate their privileges on the affected Windows systems.

The Impact of CVE-2021-43238

The impact of this vulnerability is considered high with a CVSS base score of 7.8.

Technical Details of CVE-2021-43238

This section provides technical details and affected systems.

Vulnerability Description

The vulnerability enables unauthorized users to elevate their privileges on Windows systems.

Affected Systems and Versions

Windows 10 Version 1809, Windows Server 2019, Windows Server 2019 (Server Core installation), Windows 10 Version 1909, Windows 10 Version 21H1, Windows Server 2022, Windows 10 Version 2004, Windows Server version 2004, Windows 10 Version 20H2, Windows Server version 20H2, Windows 11 version 21H2, Windows 10 Version 21H2, Windows 10 Version 1507, Windows 10 Version 1607, Windows Server 2016, Windows Server 2016 (Server Core installation), Windows 7, Windows 7 Service Pack 1, Windows 8.1, Windows Server 2008 Service Pack 2, Windows Server 2008 Service Pack 2 (Server Core installation), Windows Server 2008 Service Pack 2, Windows Server 2008 R2 Service Pack 1, Windows Server 2008 R2 Service Pack 1 (Server Core installation), Windows Server 2012, Windows Server 2012 (Server Core installation), Windows Server 2012 R2, and Windows Server 2012 R2 (Server Core installation).

Exploitation Mechanism

The vulnerability is exploited by malicious actors to gain unauthorized privileges on vulnerable Windows systems.

Mitigation and Prevention

To address CVE-2021-43238, follow these mitigation steps:

Immediate Steps to Take

Apply security updates provided by Microsoft.
Monitor system activity for any signs of unauthorized access.

Long-Term Security Practices

Regularly update and patch Windows systems.
Implement least privilege access controls.
Conduct regular security audits to detect vulnerabilities.

Patching and Updates

Microsoft releases patches and security updates to address CVE-2021-43238. Stay informed and apply updates promptly.