nio/XMLLightweightParser.java in Ignite Realtime Openfire before 3.9.2 does not properly restrict the processing of compressed XML elements, which allows remote attackers to cause a denial of service (resource consumption) via a crafted XMPP stream, aka an "xmppbomb" attack.
http://www.kb.cert.org/vuls/id/495476
http://openwall.com/lists/oss-security/2014/04/09/1
http://openwall.com/lists/oss-security/2014/04/07/7
http://fisheye.igniterealtime.org/changelog/openfiregit?cs=3aec383e07ee893b77396fe946766bbd3758af77