Multiple HTTP response splitting vulnerabilities in PHP 5.1.1 allow remote attackers to inject arbitrary HTTP headers via a crafted Set-Cookie header, related to the (1) session extension (aka ext/session) and the (2) header function.
https://exchange.xforce.ibmcloud.com/vulnerabilities/24094
http://www.vupen.com/english/advisories/2006/0369
http://www.vupen.com/english/advisories/2006/0177
http://www.securityfocus.com/bid/16220
http://www.php.net/release_5_1_2.php
http://www.mandriva.com/security/advisories?name=MDKSA-2006:028
http://www.hardened-php.net/advisory_012006.112.html
http://www.gentoo.org/security/en/glsa/glsa-200603-22.xml
http://www.debian.org/security/2007/dsa-1331
http://securitytracker.com/id?1015484
http://secunia.com/advisories/25945
http://secunia.com/advisories/19355
http://secunia.com/advisories/19179
http://secunia.com/advisories/19012
http://secunia.com/advisories/18697
http://secunia.com/advisories/18431
http://lists.suse.de/archive/suse-security-announce/2006-Feb/0008.html