SB2024012513 - Multiple vulnerabilities in Jenkins and Jenkins LTS

Description

This security bulletin contains information about 2 vulnerabilities.

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

CWE-ID: CWE-284 - Improper Access Control

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:A/U:Amber

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)

CWE-ID: CWE-1385 - Missing Origin Validation in WebSockets

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:P/U:Amber

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