CVE-2021-22253 : Security Advisory and Response

A detailed overview of CVE-2021-22253 affecting GitLab versions 13.4 to 14.1.2.

Understanding CVE-2021-22253

This section provides insights into the impact, technical details, and mitigation strategies related to CVE-2021-22253.

What is CVE-2021-22253?

The vulnerability involves improper authorization in GitLab EE, enabling a user to trigger deployments to protected environments even after access removal from versions 13.4 to 14.1.2.

The Impact of CVE-2021-22253

With a CVSS base score of 4.9 (Medium), the vulnerability has a high attack complexity and network attack vector, posing a risk of unauthorized deployments post-access removal.

Technical Details of CVE-2021-22253

Explore the specific aspects of the vulnerability concerning affected systems, exploitation mechanism, and more.

Vulnerability Description

Improper authorization in GitLab EE allows users to conduct deployments in protected environments post-access removal.

Affected Systems and Versions

GitLab versions >=13.4 and <13.12.9, >=14.0 and <14.0.7, and >=14.1 and <14.1.2 are susceptible to this vulnerability.

Exploitation Mechanism

Attackers can exploit this vulnerability through network-based attacks, requiring low privileges and without user interaction.

Mitigation and Prevention

Learn about immediate steps to secure systems and establish long-term security practices.

Immediate Steps to Take

Ensure access controls are properly configured, and monitor deployments to protected environments for unauthorized activities.

Long-Term Security Practices

Implement regular security audits, train staff on access management, and stay informed about security updates.

Patching and Updates

Apply the latest patches provided by GitLab to address the CVE-2021-22253 vulnerability.