CVE-2021-39905 : What You Need to Know

This CVE article provides insights into an information disclosure vulnerability in GitLab affecting versions >=8.9.6 and <14.2.6.

Understanding CVE-2021-39905

This section delves into the details of the CVE-2021-39905 vulnerability.

What is CVE-2021-39905?

An information disclosure vulnerability in GitLab allows users to view basic information on private groups shared with a public project starting from version 8.9.6.

The Impact of CVE-2021-39905

The vulnerability has a CVSS base score of 4.3 (Medium severity) and exposes basic information on private groups through the GitLab CE/EE API.

Technical Details of CVE-2021-39905

Exploring the technical aspects of the CVE-2021-39905 vulnerability.

Vulnerability Description

The vulnerability enables users to access basic details of private groups shared with public projects via the GitLab API.

Affected Systems and Versions

Product: GitLab
Vendor: GitLab
Versions Affected: >=8.9.6, <14.2.6

Exploitation Mechanism

The vulnerability can be exploited by authenticated users to retrieve sensitive information about private groups.

Mitigation and Prevention

Understanding how to mitigate the risks associated with CVE-2021-39905.

Immediate Steps to Take

Upgrade GitLab to a version higher than 14.2.6 to eliminate the vulnerability.
Restrict API access and permissions to mitigate potential exploitation.

Long-Term Security Practices

Regularly audit and review access controls to prevent unauthorized data disclosure.
Educate users on the importance of protecting sensitive information.

Patching and Updates

Ensure timely patching of GitLab instances and stay informed about security updates to address vulnerabilities promptly.