CVE-2021-21606 log

Severity Medium
Remote Yes
Type Information disclosure
Jenkins provides a feature for jobs to store and track fingerprints of files used during a build. Jenkins 2.274 and earlier, LTS 2.263.1 and earlier provides a REST API to check where a given fingerprint was used by which builds. This endpoint does not fully validate that the provided fingerprint ID is properly formatted before checking for the XML metadata for that fingerprint on the controller file system. This allows attackers with Overall/Read permission to check for the existence of XML files on the controller file system where the relative path can be constructed as 32 characters. Jenkins 2.275, LTS 2.263.2 validates that a fingerprint ID is properly formatted before checking for its existence.
Group Package Affected Fixed Severity Status Ticket
AVG-1446 jenkins 2.274-1 2.275-1 High Fixed
Date Advisory Group Package Severity Type
20 Jan 2021 ASA-202101-41 AVG-1446 jenkins High multiple issues