CVE-2021-39941 Explained : Impact and Mitigation

An information disclosure vulnerability in GitLab versions 12.0 to 14.5.2 allowed non-project members to see default branch names for restricted projects.

Understanding CVE-2021-39941

This CVE involves an information disclosure vulnerability in GitLab versions 12.0 to 14.5.2.

What is CVE-2021-39941?

It's an information disclosure vulnerability in GitLab versions 12.0 to 14.5.2.
Non-project members can view default branch names of restricted projects.

The Impact of CVE-2021-39941

CVSS Score: 3.7 (Low)
Attack Complexity: High
Attack Vector: Network
Confidentiality Impact: Low
Integrity Impact: None
Privileges Required: None
Scope: Unchanged
This vulnerability allows unauthorized access to sensitive project information.

Technical Details of CVE-2021-39941

Explores the technical aspects of this vulnerability.

Vulnerability Description

Information disclosure vulnerability in GitLab versions 12.0 to 14.5.2.
Non-project members can see default branch names of restricted projects.

Affected Systems and Versions

Affected Product: GitLab
Affected Versions: >=12.0, <14.3.6, >=14.4, <14.4.4, >=14.5, <14.5.2

Exploitation Mechanism

Attackers can exploit this vulnerability through network interaction to view sensitive project information.

Mitigation and Prevention

Measures to mitigate and prevent the exploitation of this vulnerability.

Immediate Steps to Take

Update GitLab to versions 14.3.6, 14.4.4, or 14.5.2, which contain fixes.
Restrict access to sensitive project information to authorized users.

Long-Term Security Practices

Regularly monitor and audit access controls within GitLab.
Educate users on secure practices to prevent information disclosure.

Patching and Updates

Apply security patches promptly to ensure systems are protected against known vulnerabilities.