CVE-2021-41338 : Security Advisory and Response
Learn about CVE-2021-41338, a security feature bypass vulnerability affecting various Microsoft Windows versions. Find mitigation steps and patch updates here.
A security feature bypass vulnerability in Windows AppContainer Firewall Rules.
Understanding CVE-2021-41338
What is CVE-2021-41338?
Windows AppContainer Firewall Rules Security Feature Bypass Vulnerability affecting various Microsoft Windows versions.
The Impact of CVE-2021-41338
This vulnerability has a Medium base severity with a CVSS base score of 5.5. It allows an attacker to bypass security features.
Technical Details of CVE-2021-41338
Vulnerability Description
The vulnerability allows attackers to bypass security features in Windows AppContainer Firewall Rules.
Affected Systems and Versions
- Windows 10 Version 1809, 1909, 21H1, 2004, 20H2, 11 version 21H2
- Windows Server 2019, 2022, Server version 2004
- Windows 10 Version 1507, 1607
- Windows Server 2016
Exploitation Mechanism
The vulnerability can be exploited on 32-bit, x64-based, and ARM64-based systems running affected versions of Windows.
Mitigation and Prevention
Immediate Steps to Take
- Apply security updates provided by Microsoft.
- Monitor network traffic for any unusual activity.
- Implement the principle of least privilege.
Long-Term Security Practices
- Regularly update and patch all systems and software.
- Conduct security training for users to recognize and report suspicious activities.
- Utilize firewalls and intrusion detection systems.
Patching and Updates
Patch updates are available from Microsoft for all affected Windows versions.