SB2024012513 - Multiple vulnerabilities in Jenkins and Jenkins LTS

Description

This security bulletin contains information about 2 secuirty vulnerabilities.

1) Improper access control (CVE-ID: CVE-2024-23897)

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

The vulnerability exists due to the affected application does not disable a feature of its CLI command parser that replaces an "@" character followed by a file path in an argument with the file’s contents. A remote attacker can read arbitrary files on the Jenkins controller file system, leading to arbitrary code execution.

2) Missing Origin Validation in WebSockets (CVE-ID: CVE-2024-23898)

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

The vulnerability exists due to a cross-site WebSocket hijacking (CSWSH) issue when the affected application does not perform origin validation of requests made through the CLI WebSocket endpoint. A remote attacker can execute CLI commands on the Jenkins controller.

Remediation

Install update from vendor's website.

References

• https://www.jenkins.io/security/advisory/2024-01-24/#SECURITY-3314
• http://www.openwall.com/lists/oss-security/2024/01/24/6
• https://www.jenkins.io/security/advisory/2024-01-24/#SECURITY-3315