CVE-2020-13295 : What You Need to Know

GitLab Runner before versions 13.0.12, 13.1.6, and 13.2.3 is vulnerable to SSRF attacks when a malicious server replaces dockerd.

Understanding CVE-2020-13295

This CVE involves a vulnerability in GitLab Runner that allows for SSRF attacks, potentially compromising the Shared Runner.

What is CVE-2020-13295?

CVE-2020-13295 is a security vulnerability in GitLab Runner that enables an attacker to perform Server-Side Request Forgery (SSRF) attacks by substituting dockerd with a malicious server.

The Impact of CVE-2020-13295

The vulnerability in GitLab Runner could lead to SSRF attacks, posing a risk to the integrity and confidentiality of the Shared Runner.

Technical Details of CVE-2020-13295

GitLab Runner versions prior to 13.0.12, 13.1.6, and 13.2.3 are affected by this vulnerability.

Vulnerability Description

By replacing dockerd with a malicious server, an attacker can exploit the Shared Runner through SSRF.

Affected Systems and Versions

Product: GitLab Runner
Vendor: GitLab
Vulnerable Versions:
=1.0, <13.0.12

=13.1, <13.1.6

=13.2, <13.2.3

Exploitation Mechanism

The vulnerability allows an attacker to manipulate the Shared Runner by leveraging SSRF through a malicious server.

Mitigation and Prevention

It is crucial to take immediate action to secure systems against CVE-2020-13295.

Immediate Steps to Take

Update GitLab Runner to versions 13.0.12, 13.1.6, or 13.2.3 to mitigate the vulnerability.
Monitor network traffic for any suspicious SSRF activities.

Long-Term Security Practices

Implement strict input validation to prevent SSRF attacks.
Regularly audit and review server configurations to identify and address vulnerabilities.

Patching and Updates

Apply security patches promptly to ensure the GitLab Runner is up to date and protected against known vulnerabilities.