CVE-2020-13268 : Security Advisory and Response

A vulnerability in GitLab could allow an attacker to confirm the existence of files on object storage services without revealing their contents.

Understanding CVE-2020-13268

This CVE affects GitLab versions 12.10 and later through 13.0.1.

What is CVE-2020-13268?

This vulnerability enables the confirmation of file existence on object storage services without disclosing their contents in GitLab.

The Impact of CVE-2020-13268

CVSS Base Score: 5.3 (Medium)
Attack Vector: Network
Attack Complexity: Low
Confidentiality Impact: Low
Integrity Impact: None
Privileges Required: None
User Interaction: None
Scope: Unchanged
Availability Impact: None

Technical Details of CVE-2020-13268

This section provides detailed technical information about the vulnerability.

Vulnerability Description

A specially crafted request can be used to confirm the existence of files on object storage services without revealing their contents in GitLab.

Affected Systems and Versions

Affected Product: GitLab
Affected Versions:
=12.8, <12.9.8

=12.10, <12.10.7

=13.0, <13.0.1

Exploitation Mechanism

The vulnerability can be exploited by sending a specially crafted request to the GitLab system to confirm the existence of files on object storage services.

Mitigation and Prevention

It is crucial to take immediate steps to address and prevent the exploitation of this vulnerability.

Immediate Steps to Take

Update GitLab to a patched version that addresses the vulnerability.
Monitor and restrict access to sensitive files and data.

Long-Term Security Practices

Regularly update and patch software to prevent vulnerabilities.
Implement access controls and encryption to protect sensitive information.

Patching and Updates

GitLab has released patches to address this vulnerability. Ensure timely installation of these patches to secure your system.