CVE-2017-1000354

Source
Severity High
Remote Yes
Type Privilege escalation
Description
The login command available in the remoting-based CLI stored the encrypted user name of the successfully authenticated user in a cache file used to authenticate further commands. Users with sufficient permission to create secrets in Jenkins, and download their encrypted values (e.g. with Job/Configure permission), were able to impersonate any other Jenkins user on the same instance.

This has been fixed by storing the cached authentication as a hash-based MAC with a key specific to the Jenkins instance and the CLI authentication cache.

Previously cached authentications are invalidated when upgrading Jenkins to a version containing a fix for this.
Group Package Affected Fixed Severity Status Ticket
AVG-255 jenkins 2.56-1 2.57-1 High Fixed
Date Advisory Group Package Severity Description
27 Apr 2017 ASA-201704-8 AVG-255 jenkins High multiple issues
References
https://jenkins.io/security/advisory/2017-04-26/