CVE-2020-13309 : Exploit Details and Defense Strategies

A vulnerability in GitLab versions before 13.1.10, 13.2.8, and 13.3.4 allowed a blind SSRF attack through the repository mirroring feature.

Understanding CVE-2020-13309

This CVE involves a Server-side Request Forgery (SSRF) vulnerability in GitLab.

What is CVE-2020-13309?

GitLab versions <13.1.10, <13.2.8, and <13.3.4 were susceptible to a blind SSRF attack through repository mirroring.

The Impact of CVE-2020-13309

CVSS Score: 5.4 (Medium Severity)
Attack Vector: Network
Attack Complexity: Low
Integrity Impact: Low
Privileges Required: Low
Availability Impact: Low
The vulnerability could be exploited by an attacker to perform SSRF attacks.

Technical Details of CVE-2020-13309

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

Vulnerability Description

GitLab versions before 13.1.10, 13.2.8, and 13.3.4 were vulnerable to a blind SSRF attack through repository mirroring.

Affected Systems and Versions

Affected Systems: GitLab
Affected Versions:
=1.0, <13.1.10

=13.2, <13.2.8

=13.3, <13.3.4

Exploitation Mechanism

The vulnerability allowed attackers to exploit the repository mirroring feature to conduct SSRF attacks.

Mitigation and Prevention

Protecting systems from this vulnerability is crucial for maintaining security.

Immediate Steps to Take

Update GitLab to versions 13.1.10, 13.2.8, or 13.3.4 or later to mitigate the SSRF vulnerability.
Monitor and restrict network access to prevent unauthorized SSRF attacks.

Long-Term Security Practices

Regularly update and patch GitLab to ensure protection against known vulnerabilities.
Educate users on SSRF risks and best practices to prevent such attacks.

Patching and Updates

Stay informed about security updates from GitLab and promptly apply patches to secure the system.