org/apache/catalina/filters/CsrfPreventionFilter.java in Apache Tomcat 6.x before 6.0.36 and 7.x before 7.0.32 allows remote attackers to bypass the cross-site request forgery (CSRF) protection mechanism via a request that lacks a session identifier.
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A18541
https://h20566.www2.hp.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c03748878
http://www.ubuntu.com/usn/USN-1685-1
http://www.securitytracker.com/id?1027834
http://www.securityfocus.com/bid/56814
http://tomcat.apache.org/security-7.html
http://tomcat.apache.org/security-6.html
http://svn.apache.org/viewvc?view=revision&revision=1393088
http://secunia.com/advisories/57126
http://rhn.redhat.com/errata/RHSA-2013-1853.html
http://rhn.redhat.com/errata/RHSA-2013-1437.html
http://rhn.redhat.com/errata/RHSA-2013-0648.html
http://rhn.redhat.com/errata/RHSA-2013-0647.html
http://rhn.redhat.com/errata/RHSA-2013-0268.html
http://rhn.redhat.com/errata/RHSA-2013-0267.html
http://marc.info/?l=bugtraq&m=139344343412337&w=2
http://marc.info/?l=bugtraq&m=136612293908376&w=2
http://lists.opensuse.org/opensuse-updates/2013-01/msg00080.html
http://lists.opensuse.org/opensuse-updates/2013-01/msg00051.html
http://lists.opensuse.org/opensuse-updates/2013-01/msg00037.html
http://lists.opensuse.org/opensuse-updates/2012-12/msg00090.html
http://lists.opensuse.org/opensuse-updates/2012-12/msg00089.html
http://archives.neohapsis.com/archives/bugtraq/2012-12/0045.html