SB2024012520 - Multiple vulnerabilities in Jenkins GitLab Branch Source plugin

Description

This security bulletin contains information about 3 secuirty vulnerabilities.

1) Improper access control (CVE-ID: CVE-2024-23901)

The vulnerability allows a remote attacker to gain unauthorized access to otherwise restricted functionality.

The vulnerability exists due to the affected plugin unconditionally discovers projects that are shared with the configured owner group. A remote attacker can configure and share a project, resulting in a crafted Pipeline being built by Jenkins during the next scan of the group.

2) Information disclosure (CVE-ID: CVE-2024-23903)

The vulnerability allows a remote attacker to gain access to potentially sensitive information.

The vulnerability exists due to the affected plugin uses a non-constant time comparison function when checking whether the provided and expected webhook token are equal. A remote attacker can use statistical methods to obtain a valid webhook token.

3) Cross-site request forgery (CVE-ID: CVE-2024-23902)

The vulnerability allows a remote attacker to perform cross-site request forgery attacks.

The vulnerability exists due to insufficient validation of the HTTP request origin. A remote attacker can trick the victim to visit a specially crafted web page and perform arbitrary actions on behalf of the victim on the vulnerable website.

Remediation

Install update from vendor's website.

References

• https://www.jenkins.io/security/advisory/2024-01-24/#SECURITY-3040
• http://www.openwall.com/lists/oss-security/2024/01/24/6
• https://www.jenkins.io/security/advisory/2024-01-24/#SECURITY-2871
• https://www.jenkins.io/security/advisory/2024-01-24/#SECURITY-3251