The default configuration of the (1) LdapLoginModule and (2) LdapExtLoginModule modules in JBoss Enterprise Application Platform (EAP) 4.3.0 CP10, 5.2.0, and 6.0.1, and Enterprise Web Platform (EWP) 5.2.0 allow remote attackers to bypass authentication via an empty password.
http://rhn.redhat.com/errata/RHSA-2013-0586.html
http://rhn.redhat.com/errata/RHSA-2013-0533.html
http://rhn.redhat.com/errata/RHSA-2013-0248.html
http://rhn.redhat.com/errata/RHSA-2013-0234.html
http://rhn.redhat.com/errata/RHSA-2013-0233.html
http://rhn.redhat.com/errata/RHSA-2013-0232.html
http://rhn.redhat.com/errata/RHSA-2013-0231.html
http://rhn.redhat.com/errata/RHSA-2013-0230.html