The ap_proxy_http_process_response function in mod_proxy_http.c in the mod_proxy module in the Apache HTTP Server 2.0.63 and 2.2.8 does not limit the number of forwarded interim responses, which allows remote HTTP servers to cause a denial of service (memory consumption) via a large number of interim responses.
https://www.redhat.com/archives/fedora-package-announce/2008-August/msg00153.html
https://www.redhat.com/archives/fedora-package-announce/2008-August/msg00055.html
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A9577
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A6084
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A11713
https://exchange.xforce.ibmcloud.com/vulnerabilities/42987
http://www.vupen.com/english/advisories/2009/0320
http://www.vupen.com/english/advisories/2008/2780
http://www.vupen.com/english/advisories/2008/1798
http://www.ubuntu.com/usn/USN-731-1
http://www.securityfocus.com/bid/31681
http://www.securityfocus.com/bid/29653
http://www.securityfocus.com/archive/1/498567/100/0/threaded
http://www.securityfocus.com/archive/1/494858/100/0/threaded
http://www.redhat.com/support/errata/RHSA-2008-0966.html
http://www.oracle.com/technetwork/topics/security/cpujuly2013-1899826.html
http://www-1.ibm.com/support/docview.wss?uid=swg1PK67579
http://www-01.ibm.com/support/docview.wss?uid=swg27008517
http://security.gentoo.org/glsa/glsa-200807-06.xml
http://secunia.com/advisories/34418
http://secunia.com/advisories/34259
http://secunia.com/advisories/34219
http://secunia.com/advisories/33797
http://secunia.com/advisories/33156
http://secunia.com/advisories/32838
http://secunia.com/advisories/32685
http://secunia.com/advisories/32222
http://secunia.com/advisories/31904
http://secunia.com/advisories/31651
http://secunia.com/advisories/31416
http://secunia.com/advisories/31404
http://secunia.com/advisories/31026
http://secunia.com/advisories/30621
http://rhn.redhat.com/errata/RHSA-2008-0967.html
http://marc.info/?l=bugtraq&m=125631037611762&w=2
http://marc.info/?l=bugtraq&m=123376588623823&w=2
http://lists.opensuse.org/opensuse-security-announce/2009-03/msg00004.html
http://lists.opensuse.org/opensuse-security-announce/2009-03/msg00001.html