The XML4J parser in IBM WebSphere Message Broker 6.1 before 6.1.0.12, 7.0 before 7.0.0.7, and 8.0 before 8.0.0.4 and IBM Integration Bus 9.0 before 9.0.0.1 allows remote attackers to cause a denial of service (memory consumption) via a crafted XML document that triggers expansion for many entities.
https://www.ibm.com/developerworks/java/jdk/alerts/#IBM_Security_Update_November_2013
https://exchange.xforce.ibmcloud.com/vulnerabilities/86662
http://www-01.ibm.com/support/docview.wss?uid=swg21655202
http://www-01.ibm.com/support/docview.wss?uid=swg21655201
http://www-01.ibm.com/support/docview.wss?uid=swg21653087
http://www-01.ibm.com/support/docview.wss?uid=swg1IC96473
http://secunia.com/advisories/56338
http://rhn.redhat.com/errata/RHSA-2013-1793.html
http://rhn.redhat.com/errata/RHSA-2013-1509.html
http://rhn.redhat.com/errata/RHSA-2013-1508.html
http://rhn.redhat.com/errata/RHSA-2013-1507.html
http://lists.opensuse.org/opensuse-security-announce/2013-11/msg00013.html