CVE-2021-43247 : Vulnerability Insights and Analysis

Windows TCP/IP Driver Elevation of Privilege Vulnerability was published by Microsoft on 2021-12-14.

Understanding CVE-2021-43247

This CVE concerns an elevation of privilege vulnerability in the Windows TCP/IP driver.

What is CVE-2021-43247?

The CVE-2021-43247 relates to a security flaw that could allow an attacker to escalate privileges on affected systems.

The Impact of CVE-2021-43247

The vulnerability has a base severity rating of HIGH (CVSS score: 7.8), indicating a significant risk to affected systems.

Technical Details of CVE-2021-43247

This section provides detailed technical information about CVE-2021-43247.

Vulnerability Description

Type: Elevation of Privilege
Language: en-US

Affected Systems and Versions

Windows 10 Version 1809: Less than 10.0.17763.2366
Windows Server 2019: Less than 10.0.17763.2366
Windows Server 2019 (Server Core installation): Less than 10.0.17763.2366
Windows 10 Version 1909: Less than 10.0.18363.1977
Windows 10 Version 21H1: Less than 10.0.19043.1415
Windows Server 2022: Less than 10.0.20348.405
Windows 10 Version 2004: Less than 10.0.19041.1415
Windows Server version 2004: Less than 10.0.19041.1415
Windows 10 Version 20H2: Less than 10.0.19042.1415
Windows Server version 20H2: Less than 10.0.19042.1415
Windows 11 version 21H2: Less than 10.0.22000.376
Windows 10 Version 21H2: Less than 10.0.19044.1415

Exploitation Mechanism

The vulnerability could be exploited by an attacker to elevate privileges on affected Windows systems.

Mitigation and Prevention

Here are the steps to mitigate and prevent CVE-2021-43247:

Immediate Steps to Take

Apply the latest security updates from Microsoft.
Monitor system logs for any unusual activity.
Implement the principle of least privilege for user accounts.

Long-Term Security Practices

Regularly update and patch systems to address security vulnerabilities.
Conduct security awareness training for users to recognize potential threats.

Patching and Updates

Microsoft has released patches to address this vulnerability. Ensure systems are updated with the latest security updates.