CVE-2021-39902 : Vulnerability Insights and Analysis

CVE-2021-39902 is a vulnerability in GitLab that allows a user with guest membership in a project to modify the severity of an incident.

Understanding CVE-2021-39902

This section provides insights into the details and impact of the CVE.

What is CVE-2021-39902?

The vulnerability involves Incorrect Authorization in GitLab CE/EE 13.4 or above, enabling unauthorized users to manipulate incident severity.

The Impact of CVE-2021-39902

The vulnerability's CVSS score is 4.3 (Medium Severity) with low integrity impact, affecting specific GitLab versions.

Technical Details of CVE-2021-39902

Explore the technical aspects and implications of the GitLab vulnerability.

Vulnerability Description

The flaw allows users with guest access to project modification privileges beyond their scope.

Affected Systems and Versions

Product: GitLab
Vendor: GitLab
Affected Versions:
=13.4, <14.2.6

=14.3, <14.3.4

=14.4, <14.4.1

Exploitation Mechanism

Unauthorized users exploit the vulnerability through network-based attacks with low complexity, requiring minimal privileges.

Mitigation and Prevention

Learn how to address and prevent CVE-2021-39902.

Immediate Steps to Take

Update GitLab to versions 14.2.6, 14.3.4, or 14.4.1 to mitigate the vulnerability.
Review and adjust project access permissions to prevent unauthorized modifications.
Monitor incidents for unauthorized severity changes.

Long-Term Security Practices

Conduct regular security training for project members on access control.
Implement multi-factor authentication for enhanced security.

Patching and Updates

Stay informed about GitLab security releases and apply patches promptly to protect against vulnerabilities.