CVE-2021-22237 : Vulnerability Insights and Analysis

GitLab has reported a vulnerability that could allow a user with an impersonation token to perform Git actions under specific conditions even if impersonation is disabled. This affects versions before 13.12.9, 14.0.7, and 14.1.2.

Understanding CVE-2021-22237

This vulnerability in GitLab has a CVSS base score of 6.6, making it of medium severity. It is related to improper privilege management.

What is CVE-2021-22237?

The identified vulnerability in GitLab allows a user with an impersonation token to carry out Git actions even with impersonation disabled. This security flaw is present in GitLab CE/EE versions prior to 13.12.9, 14.0.7, and 14.1.2.

The Impact of CVE-2021-22237

With a CVSS base score of 6.6, this vulnerability poses a medium risk. If exploited, a malicious actor could perform unauthorized Git actions, impacting confidentiality, integrity, and availability.

Technical Details of CVE-2021-22237

This vulnerability in GitLab has a CVSS v3.1 base score of 6.6, with a high attack complexity, network attack vector, and high impacts on availability, confidentiality, and integrity.

Vulnerability Description

Under specific circumstances, GitLab may allow unauthorized Git actions by a user with an impersonation token, even when impersonation is turned off.

Affected Systems and Versions

Affected systems include GitLab CE/EE versions before 13.12.9, 14.0.7, and 14.1.2.

Exploitation Mechanism

The vulnerability enables a user with an impersonation token to execute Git actions despite impersonation being disabled.

Mitigation and Prevention

To address CVE-2021-22237, immediate actions, long-term security practices, and patching are essential.

Immediate Steps to Take

GitLab users should update their systems to versions 13.12.9, 14.0.7, or 14.1.2 to mitigate the vulnerability.

Long-Term Security Practices

Regular security updates, access control reviews, and monitoring of Git actions can enhance overall security posture.

Patching and Updates

Ensure timely application of security patches released by GitLab to prevent exploitation of this vulnerability.