In Ambari 1.2.0 through 2.2.2, it may be possible to execute arbitrary system commands on the Ambari Server host while generating SSL certificates for hosts in an Ambari cluster.

In Ambari 2.2.2 through 2.4.2 and Ambari 2.5.0, sensitive data may be stored on disk in temporary files on the Ambari Server host. The temporary files are readable by any user authenticated on the host.

Apache Ambari 2.x before 2.4.0 includes KDC administrator passwords on the kadmin command line, which allows local users to obtain sensitive information via a process listing.