Red Hat Security Advisory 2014-1726-01 – Red Hat JBoss Enterprise Application Platform is a platform for Java applications, which integrates the JBoss Application Server with JBoss Hibernate and JBoss Seam. It was discovered that the Apache Santuario XML Security for Java project allowed Document Type Definitions to be processed when applying Transforms even when secure validation was enabled. A remote attacker could use this flaw to exhaust all available memory on the system, causing a denial of service. All users of Red Hat JBoss Enterprise Application Platform 5.2.0 on Red Hat Enterprise Linux 4, 5, and 6 are advised to upgrade to these updated packages. The JBoss server process must be restarted for the update to take effect.