CVE-2019-6786 Explained : Impact and Mitigation

A vulnerability was found in GitLab Community and Enterprise Edition versions prior to 11.5.8, 11.6.x before 11.6.6, and 11.7.x before 11.7.1, allowing unauthorized access to LFS objects.

Understanding CVE-2019-6786

This CVE identifies an Incorrect Access Control vulnerability in GitLab versions prior to specified releases.

What is CVE-2019-6786?

The vulnerability allows unauthorized users to access the contents of an LFS object if they possess knowledge of the file size and OID.

The Impact of CVE-2019-6786

Unauthorized users can potentially view sensitive information stored in LFS objects, compromising data confidentiality.

Technical Details of CVE-2019-6786

This section provides detailed technical insights into the vulnerability.

Vulnerability Description

The issue in GitLab Community and Enterprise Edition versions before 11.5.8, 11.6.x before 11.6.6, and 11.7.x before 11.7.1 involves Incorrect Access Control, enabling unauthorized access to LFS objects.

Affected Systems and Versions

GitLab Community and Enterprise Edition versions prior to 11.5.8
GitLab 11.6.x before 11.6.6
GitLab 11.7.x before 11.7.1

Exploitation Mechanism

Unauthorized users with knowledge of the file size and OID can exploit this vulnerability to access LFS objects.

Mitigation and Prevention

Protect your systems from CVE-2019-6786 with the following measures:

Immediate Steps to Take

Update GitLab Community and Enterprise Edition to versions 11.5.8, 11.6.6, or 11.7.1 to mitigate the vulnerability.
Monitor access to LFS objects for any unauthorized activities.

Long-Term Security Practices

Implement strict access controls and authentication mechanisms.
Regularly audit and review access permissions to prevent unauthorized access.

Patching and Updates

Stay informed about security releases and promptly apply patches to address known vulnerabilities.