PicketBox, as used in Red Hat JBoss Enterprise Application Platform before 6.1.1, allows local users to obtain the admin encryption key by reading the Vault data file.
https://bugzilla.redhat.com/show_bug.cgi?id=948106
http://rhn.redhat.com/errata/RHSA-2014-0029.html
http://rhn.redhat.com/errata/RHSA-2013-1437.html
http://rhn.redhat.com/errata/RHSA-2013-1209.html