CVE-2019-6995 : What You Need to Know

A vulnerability has been identified in versions 8.x, 9.x, 10.x, and 11.x of GitLab Community and Enterprise Edition, allowing users to post comments on locked project issues.

Understanding CVE-2019-6995

This CVE relates to an incorrect access control implementation in GitLab versions before 11.5.8, 11.6.x before 11.6.6, and 11.7.x before 11.7.1.

What is CVE-2019-6995?

CVE-2019-6995 is a security vulnerability in GitLab that enables users to comment on locked project issues due to a flaw in access control.

The Impact of CVE-2019-6995

The vulnerability could lead to unauthorized comments on restricted project issues, potentially compromising the confidentiality and integrity of the project.

Technical Details of CVE-2019-6995

This section provides more in-depth technical insights into the CVE.

Vulnerability Description

The issue arises from an incorrect access control implementation in GitLab versions 8.x to 11.x, allowing users to bypass restrictions on commenting.

Affected Systems and Versions

GitLab Community and Enterprise Edition versions 8.x, 9.x, 10.x, and 11.x
Versions before 11.5.8, 11.6.x before 11.6.6, and 11.7.x before 11.7.1

Exploitation Mechanism

Users with access to GitLab instances running affected versions can exploit this vulnerability by posting comments on locked project issues.

Mitigation and Prevention

To address CVE-2019-6995, follow these mitigation strategies:

Immediate Steps to Take

Upgrade GitLab to version 11.5.8, 11.6.6, or 11.7.1 or later.
Monitor project comments for any unauthorized activity.

Long-Term Security Practices

Regularly review and update access control policies.
Educate users on proper commenting practices and permissions.

Patching and Updates

Apply security patches promptly to ensure protection against known vulnerabilities.