CVE-2020-13313 : Security Advisory and Response

A vulnerability in GitLab versions before 13.1.10, 13.2.8, and 13.3.4 allowed unauthorized project maintainers to edit subgroup badges due to a lack of authorization control.

Understanding CVE-2020-13313

This CVE involves an improper authorization issue in GitLab, impacting versions prior to 13.1.10, 13.2.8, and 13.3.4.

What is CVE-2020-13313?

The vulnerability in GitLab versions before 13.1.10, 13.2.8, and 13.3.4 allowed unauthorized project maintainers to edit subgroup badges due to a lack of proper authorization control.

The Impact of CVE-2020-13313

CVSS Score: 4.3 (Medium Severity)
Attack Vector: Network
Attack Complexity: Low
Integrity Impact: Low
Privileges Required: Low
User Interaction: None
Scope: Unchanged
The vulnerability did not have a direct impact on confidentiality or availability.

Technical Details of CVE-2020-13313

This section provides detailed technical information about the vulnerability.

Vulnerability Description

The vulnerability allowed unauthorized project maintainers to edit subgroup badges due to the lack of proper authorization control in GitLab versions before 13.1.10, 13.2.8, and 13.3.4.

Affected Systems and Versions

Affected Product: GitLab
Affected Versions:
=1.0, <13.1.10

=13.2, <13.2.8

=13.3, <13.3.4

Exploitation Mechanism

The vulnerability could be exploited by unauthorized project maintainers to manipulate subgroup badges without proper authorization.

Mitigation and Prevention

Protect your systems from CVE-2020-13313 with these mitigation strategies.

Immediate Steps to Take

Update GitLab to versions 13.1.10, 13.2.8, or 13.3.4 or later to eliminate the vulnerability.
Monitor and restrict project maintainer permissions to prevent unauthorized badge edits.

Long-Term Security Practices

Regularly review and adjust authorization controls within GitLab to prevent similar issues.
Educate project maintainers on proper badge editing protocols to maintain system security.

Patching and Updates

Stay informed about security updates and patches released by GitLab to address vulnerabilities like CVE-2020-13313.