The re-key admin monitor was introduced in Jenkins 1.498 and re-encrypted all secrets in JENKINS_HOME with a new key. It also created a backup directory with all old secrets, and the key used to encrypt them. These backups were world-readable and not removed afterwards. Jenkins now deletes the backup directory, if present. Upgrading from before 1.498 will no longer create a backup directory. Administrators relying on file access permissions in their manually created backups are advised to check them for the directory $JENKINS_HOME/jenkins.security.RekeySecretAdminMonitor/backups, and delete it if present.
References
- https://nvd.nist.gov/vuln/detail/CVE-2017-1000362
- https://jenkins.io/security/advisory/2017-02-01/
- https://github.com/jenkinsci/jenkins/commit/0be33cf7328fad6a7596ce9505a74561a8b1eb85
- https://github.com/jenkinsci/jenkins/commit/a572450f039fdb99410fcf6eb0ba307bd69ea458
- https://github.com/advisories/GHSA-92mr-4w2q-4578