CVE-2021-39888 : Security Advisory and Response

CVE-2021-39888 is a vulnerability affecting GitLab versions leading to possible exposure of sensitive information. Learn about its impact and mitigation.

Understanding CVE-2021-39888

CVE-2021-39888 details a vulnerability in GitLab versions that could potentially expose private group details through an API endpoint.

What is CVE-2021-39888?

The vulnerability in GitLab versions allows access to private group details and sensitive information within issue and merge request templates.

The Impact of CVE-2021-39888

The exploit could disclose private group data, posing a threat to confidentiality, with a CVSS base score of 4.3 (Medium severity).

Technical Details of CVE-2021-39888

GitLab's vulnerability CVE-2021-39888 has specific technical aspects to consider.

Vulnerability Description

The issue presents in versions >=13.10 & <14.1.7, >=14.2 & <14.2.5, and >=14.3 & <14.3.1, exposing private group info through an API endpoint.

Affected Systems and Versions

Affected Product: GitLab
Vulnerable Versions: >=13.10, <14.1.7, >=14.2, <14.2.5, >=14.3, <14.3.1

Exploitation Mechanism

Attack Complexity: Low
Attack Vector: Network
Required Privileges: Low
Scope: Unchanged
User Interaction: None

Mitigation and Prevention

To secure your systems from CVE-2021-39888, follow these best practices:

Immediate Steps to Take

Upgrade GitLab to versions 14.1.7, 14.2.5, or 14.3.1 to eliminate the vulnerability.
Review and restrict access to sensitive information within GitLab.

Long-Term Security Practices

Regularly monitor and audit API endpoints for unauthorized access.
Educate users on secure data handling practices within GitLab.

Patching and Updates

Ensure timely application of security patches provided by GitLab to prevent exploitation of known vulnerabilities.