CVE-2019-5468 : Security Advisory and Response

A vulnerability has been identified in GitLab versions below 12.1.2, 12.0.4, and 11.11.6, related to privileges when restricted user accounts interact with Mattermost slash commands.

Understanding CVE-2019-5468

This CVE involves a privilege escalation issue in GitLab versions prior to 12.1.2, 12.0.4, and 11.11.6 when certain interactions occur.

What is CVE-2019-5468?

This CVE pertains to a vulnerability in GitLab that allows privilege escalation when restricted user accounts use Mattermost slash commands.

The Impact of CVE-2019-5468

The vulnerability can lead to unauthorized privilege escalation within affected GitLab versions, potentially compromising the security of the system.

Technical Details of CVE-2019-5468

This section provides more technical insights into the CVE.

Vulnerability Description

The issue arises from how restricted user accounts interact with Mattermost slash commands, leading to privilege escalation.

Affected Systems and Versions

Product: GitLab
Vendor: GiltLab
Affected Versions:
GitLab before 12.1.2
GitLab before 12.0.4
GitLab before 11.11.6

Exploitation Mechanism

The vulnerability is exploited when restricted user accounts utilize Mattermost slash commands, allowing unauthorized privilege escalation.

Mitigation and Prevention

To address CVE-2019-5468, follow these mitigation steps:

Immediate Steps to Take

Upgrade GitLab to version 12.1.2 or above to eliminate the vulnerability.
Monitor user interactions and access levels within GitLab to detect any unauthorized activities.

Long-Term Security Practices

Regularly review and update user privileges and access controls within GitLab.
Educate users on secure practices to prevent unauthorized privilege escalation.

Patching and Updates

Stay informed about security updates and patches released by GitLab to address vulnerabilities like CVE-2019-5468.