The stream_reqbody_cl function in mod_proxy_http.c in the mod_proxy module in the Apache HTTP Server before 2.3.3, when a reverse proxy is configured, does not properly handle an amount of streamed data that exceeds the Content-Length value, which allows remote attackers to cause a denial of service (CPU consumption) via crafted requests.
https://www.redhat.com/archives/fedora-package-announce/2009-August/msg01363.html
https://rhn.redhat.com/errata/RHSA-2009-1148.html
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A9403
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A8616
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A12330
http://www.vupen.com/english/advisories/2009/3184
http://www.ubuntu.com/usn/USN-802-1
http://www.securityfocus.com/bid/35565
http://www.securityfocus.com/archive/1/507857/100/0/threaded
http://www.securityfocus.com/archive/1/507852/100/0/threaded
http://www.redhat.com/support/errata/RHSA-2009-1156.html
http://www.oracle.com/technetwork/topics/security/cpuapr2013-1899555.html
http://www.debian.org/security/2009/dsa-1834
http://www-01.ibm.com/support/docview.wss?uid=swg1PK99480
http://www-01.ibm.com/support/docview.wss?uid=swg1PK91259
http://svn.apache.org/viewvc?view=rev&revision=790587
http://svn.apache.org/viewvc/httpd/httpd/trunk/CHANGES?revision=790587
http://svn.apache.org/viewvc/httpd/httpd/trunk/CHANGES?r1=790587&r2=790586&pathrev=790587
http://security.gentoo.org/glsa/glsa-200907-04.xml
http://secunia.com/advisories/37221
http://secunia.com/advisories/37152
http://secunia.com/advisories/35865
http://secunia.com/advisories/35793
http://secunia.com/advisories/35721
http://secunia.com/advisories/35691
http://marc.info/?l=bugtraq&m=129190899612998&w=2
http://lists.opensuse.org/opensuse-security-announce/2009-10/msg00006.html