CVE-2020-13306 Explained : Impact and Mitigation

A vulnerability in GitLab versions before 13.1.10, 13.2.8, and 13.3.4 could allow denial of service attacks through the Webhook feature due to the absence of rate limitation.

Understanding CVE-2020-13306

This CVE involves a security issue in GitLab that could be exploited for denial of service attacks.

What is CVE-2020-13306?

The vulnerability found in GitLab versions prior to 13.1.10, 13.2.8, and 13.3.4 enables attackers to launch denial of service attacks by misusing the Webhook feature.

The Impact of CVE-2020-13306

CVSS Base Score: 3.7 (Low)
Attack Vector: Network
Attack Complexity: High
Availability Impact: Low
No impact on Confidentiality or Integrity
No privileges required
No user interaction needed

Technical Details of CVE-2020-13306

This section provides detailed technical information about the vulnerability.

Vulnerability Description

The vulnerability allows attackers to exploit the GitLab Webhook feature to conduct denial of service attacks due to the absence of rate limitation.

Affected Systems and Versions

Affected Product: GitLab
Vendor: GitLab
Vulnerable Versions:
=1.0, <13.1.10

=13.2, <13.2.8

=13.3, <13.3.4

Exploitation Mechanism

Attackers can abuse the GitLab Webhook feature to overwhelm the system with requests, leading to denial of service.

Mitigation and Prevention

Protect your systems from CVE-2020-13306 by following these security measures.

Immediate Steps to Take

Update GitLab to versions 13.1.10, 13.2.8, or 13.3.4 to mitigate the vulnerability.
Monitor and restrict Webhook usage to prevent abuse.

Long-Term Security Practices

Regularly update and patch GitLab to the latest versions.
Implement rate limiting and monitoring on Webhook usage to prevent abuse.

Patching and Updates

Apply security patches promptly to address known vulnerabilities in GitLab.