CVE-2019-7155 : What You Need to Know

A vulnerability has been found in various versions of GitLab involving an incorrect implementation of access control.

Understanding CVE-2019-7155

What is CVE-2019-7155?

An issue discovered in GitLab Community and Enterprise Edition versions 9.x, 10.x, and 11.x before specific versions, where incorrect access control allows a user to retain project roles within a private group even after being removed.

The Impact of CVE-2019-7155

This vulnerability could lead to unauthorized access and potential security breaches within GitLab instances.

Technical Details of CVE-2019-7155

Vulnerability Description

The security flaw in GitLab versions 9.x, 10.x, and 11.x allows users to maintain project roles in private groups despite being removed from the group.

Affected Systems and Versions

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

Exploitation Mechanism

The vulnerability occurs due to an incorrect implementation of access control, enabling users to retain project roles within private groups.

Mitigation and Prevention

Immediate Steps to Take

Update GitLab to versions 11.5.8, 11.6.6, or 11.7.1 to mitigate the vulnerability.
Review and adjust user privileges and access controls within GitLab.

Long-Term Security Practices

Regularly monitor and audit user permissions and roles within GitLab.
Educate users on proper access control practices to prevent unauthorized access.

Patching and Updates

Apply security patches and updates provided by GitLab to address the access control issue.