CVE-2021-43244 : Exploit Details and Defense Strategies

Windows Kernel Information Disclosure Vulnerability was published on December 15, 2021, affecting multiple Microsoft Windows versions.

Understanding CVE-2021-43244

What is CVE-2021-43244?

CVE-2021-43244 is an Information Disclosure vulnerability in the Windows Kernel.

The Impact of CVE-2021-43244

This vulnerability has a CVSS base score of 6.5, classified as MEDIUM severity. It can lead to unauthorized disclosure of information.

Technical Details of CVE-2021-43244

Vulnerability Description

The vulnerability allows attackers to gain access to sensitive information from the Windows Kernel.

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 10 Version 21H2
Versions less than 10.0.17763.2366, 10.0.18363.1977, 10.0.18363.1977, 10.0.19043.1415, 10.0.20348.405, 10.0.19041.1415, 10.0.19041.1415, 10.0.19042.1415, 10.0.19042.1415, 10.0.19044.1415 are affected.

Exploitation Mechanism

Attackers can exploit this vulnerability to disclose sensitive information in the Windows Kernel, potentially leading to further security breaches.

Mitigation and Prevention

Immediate Steps to Take

Apply relevant security updates provided by Microsoft.
Monitor for any unusual activities on the affected systems.

Long-Term Security Practices

Regularly update and patch all systems to prevent vulnerabilities.
Implement restricted user privileges to minimize the impact of security breaches.
Conduct regular security assessments and audits.

Patching and Updates

Ensure that all affected systems are updated with the latest security patches from Microsoft.