The processInvocation function in org.jboss.as.ejb3.security.AuthorizationInterceptor in JBoss Enterprise Application Platform (aka JBoss EAP or JBEAP) before 6.0.1, authorizes all requests when no roles are allowed for an Enterprise Java Beans (EJB) method invocation, which allows attackers to bypass intended access restrictions for EJB methods.
http://secunia.com/advisories/51607
http://rhn.redhat.com/errata/RHSA-2012-1594.html