scanf.c in PHP 5.1.4 and earlier, and 4.4.3 and earlier, allows context-dependent attackers to execute arbitrary code via a sscanf PHP function call that performs argument swapping, which increments an index past the end of an array and triggers a buffer over-read.
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A11062
http://www.vupen.com/english/advisories/2006/3193
http://www.ubuntu.com/usn/usn-342-1
http://www.securityfocus.com/bid/19415
http://www.redhat.com/support/errata/RHSA-2006-0682.html
http://www.redhat.com/support/errata/RHSA-2006-0669.html
http://www.php.net/release_5_1_5.php
http://www.php.net/ChangeLog-5.php#5.1.5
http://www.novell.com/linux/security/advisories/2006_52_php.html
http://www.novell.com/linux/security/advisories/2006_22_sr.html
http://www.novell.com/linux/security/advisories/2006_20_sr.html
http://www.novell.com/linux/security/advisories/2006_19_sr.html
http://www.mandriva.com/security/advisories?name=MDKSA-2006:144
http://support.avaya.com/elmodocs2/security/ASA-2006-223.htm
http://support.avaya.com/elmodocs2/security/ASA-2006-222.htm
http://support.avaya.com/elmodocs2/security/ASA-2006-221.htm
http://securitytracker.com/id?1016984
http://securityreason.com/securityalert/1341
http://security.gentoo.org/glsa/glsa-200608-28.xml
http://secunia.com/advisories/23247
http://secunia.com/advisories/22538
http://secunia.com/advisories/22487
http://secunia.com/advisories/22440
http://secunia.com/advisories/22069
http://secunia.com/advisories/22039
http://secunia.com/advisories/22004
http://secunia.com/advisories/21847
http://secunia.com/advisories/21768
http://secunia.com/advisories/21683
http://secunia.com/advisories/21608
http://secunia.com/advisories/21546
http://secunia.com/advisories/21467
http://secunia.com/advisories/21403