Jenkins Buckminster Plugin 1.1.1 and earlier does not perform a permission check in a method implementing form validation.

This allows attackers with Overall/Read permission to check for the existence of an attacker-specified file path on the Jenkins controller file system. A sequence of requests can be used to effectively list the Jenkins controller file system.

As of publication of this advisory, there is no fix.

References

• https://nvd.nist.gov/vuln/detail/CVE-2022-36918
• https://www.jenkins.io/security/advisory/2022-07-27/#SECURITY-2747
• http://www.openwall.com/lists/oss-security/2022/07/27/1