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.
http://rhn.redhat.com/errata/RHSA-2013-1207.html
http://rhn.redhat.com/errata/RHSA-2013-1208.html
http://rhn.redhat.com/errata/RHSA-2013-1209.html
http://rhn.redhat.com/errata/RHSA-2013-1437.html