Red Hat Security Advisory 2016-1434-01 – Red Hat JBoss Enterprise Application Platform 6 is a platform for Java applications based on JBoss Application Server 7. This release of Red Hat JBoss Enterprise Application Platform 6.4.9 serves as a replacement for Red Hat JBoss Enterprise Application Platform 6.4.8, and includes bug fixes and enhancements, which are documented in the Release Notes documented linked to in the References. Security Fix: It was found that JGroups did not require necessary headers for encrypt and auth protocols from new nodes joining the cluster. An attacker could use this flaw to bypass security restrictions, and use this vulnerability to send and receive messages within the cluster, leading to information disclosure, message spoofing, or further possible attacks.