CVE-2020-17139 : Exploit Details and Defense Strategies

Windows Overlay Filter Security Feature Bypass Vulnerability was published by Microsoft on December 8, 2020.

Understanding CVE-2020-17139

This CVE involves a Security Feature Bypass vulnerability affecting various Microsoft Windows versions.

What is CVE-2020-17139?

The Windows Overlay Filter Security Feature Bypass Vulnerability allows an attacker to bypass security features on affected systems, potentially leading to unauthorized access and control.

The Impact of CVE-2020-17139

The impact of this vulnerability is rated as HIGH with a CVSS base score of 7.8. It poses a significant threat to the confidentiality, integrity, and availability of the affected systems.

Technical Details of CVE-2020-17139

This section provides more technical insights into the vulnerability.

Vulnerability Description

The vulnerability enables attackers to bypass security features, potentially leading to unauthorized system access.

Affected Systems and Versions

Windows 10 Version 20H2 (32-bit and ARM64-based Systems)
Windows Server version 20H2 (x64-based Systems)
Windows 10 Version 1809 (32-bit, x64-based, and ARM64-based Systems)
Windows Server 2019 (x64-based Systems)
Windows Server 2019 (Server Core installation) (x64-based Systems)
Windows 10 Version 1909 (32-bit, x64-based, and ARM64-based Systems)
Windows Server, version 1909 (Server Core installation) (x64-based Systems)
Windows 10 Version 1903 for 32-bit, x64-based, and ARM64-based Systems
Windows Server, version 1903 (Server Core installation) (x64-based Systems)
Windows 10 Version 2004 (32-bit, ARM64-based, and x64-based Systems)
Windows Server version 2004 (x64-based Systems)

Exploitation Mechanism

The vulnerability can be exploited by attackers to bypass security controls and gain unauthorized access to the affected systems.

Mitigation and Prevention

To address CVE-2020-17139, follow these mitigation strategies:

Immediate Steps to Take

Apply the necessary security updates provided by Microsoft.
Monitor for any suspicious activities on the network.
Implement the principle of least privilege to restrict access.

Long-Term Security Practices

Regularly update and patch systems to prevent vulnerabilities.
Conduct security training for employees to enhance awareness.

Patching and Updates

Install the latest security updates and patches released by Microsoft to mitigate the vulnerability.