HTTP response smuggling vulnerability in Mozilla Firefox and Thunderbird before 1.5.0.4, when used with certain proxy servers, allows remote attackers to cause Firefox to interpret certain responses as if they were responses from two different sites via (1) invalid HTTP response headers with spaces between the header name and the colon, which might not be ignored in some cases, or (2) HTTP 1.1 headers through an HTTP 1.0 proxy, which are ignored by the proxy but processed by the client.
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A9966
https://exchange.xforce.ibmcloud.com/vulnerabilities/26844
http://www.vupen.com/english/advisories/2008/0083
http://www.vupen.com/english/advisories/2006/3749
http://www.vupen.com/english/advisories/2006/3748
http://www.vupen.com/english/advisories/2006/2106
http://www.securityfocus.com/bid/18228
http://www.securityfocus.com/archive/1/446658/100/200/threaded
http://www.securityfocus.com/archive/1/446657/100/200/threaded
http://www.securityfocus.com/archive/1/435795/100/0/threaded
http://www.redhat.com/support/errata/RHSA-2006-0611.html
http://www.redhat.com/support/errata/RHSA-2006-0610.html
http://www.redhat.com/support/errata/RHSA-2006-0594.html
http://www.redhat.com/support/errata/RHSA-2006-0578.html
http://www.novell.com/linux/security/advisories/2006_35_mozilla.html
http://www.mozilla.org/security/announce/2006/mfsa2006-33.html
http://www.mandriva.com/security/advisories?name=MDKSA-2006:145
http://www.mandriva.com/security/advisories?name=MDKSA-2006:143
http://www.gentoo.org/security/en/glsa/glsa-200606-21.xml
http://www.gentoo.org/security/en/glsa/glsa-200606-12.xml
http://www.debian.org/security/2006/dsa-1134
http://www.debian.org/security/2006/dsa-1120
http://www.debian.org/security/2006/dsa-1118
http://securitytracker.com/id?1016214
http://securitytracker.com/id?1016202
http://secunia.com/advisories/22066
http://secunia.com/advisories/22065
http://secunia.com/advisories/21631
http://secunia.com/advisories/21532
http://secunia.com/advisories/21336
http://secunia.com/advisories/21324
http://secunia.com/advisories/21270
http://secunia.com/advisories/21269
http://secunia.com/advisories/21188
http://secunia.com/advisories/21183
http://secunia.com/advisories/21178
http://secunia.com/advisories/21176
http://secunia.com/advisories/21134
http://secunia.com/advisories/20709
http://secunia.com/advisories/20561
http://secunia.com/advisories/20382