A flaw was found in the way JBoss RichFaces handled deserialization. A remote attacker could use this flaw to trigger the execution of the deserialization methods in any serializable class deployed on the server. This could lead to a variety of security impacts depending on the deserialization logic of these classes.

The JBoss Server in JBoss Enterprise Application Platform 5.1.x before 5.1.2 and 5.2.x before 5.2.2, Web Platform before 5.1.2, BRMS Platform before 5.3.0, and SOA Platform before 5.3.0, when the server is configured to use the JaccAuthorizationRealm and the ignoreBaseDecision property is set to true on the JBossWebRealm, does not properly check the permissions created by the WebPermissionMapping class, which allows remote authenticated users to access arbitrary applications.

JGroups diagnostics service in JBoss Enterprise Portal Platform before 5.2.2, SOA Platform before 5.3.0, and BRMS Platform before 5.3.0, is enabled without authentication when started by the JGroups channel, which allows remote attackers in adjacent networks to read diagnostics information via a crafted IP multicast.