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.
ftp://patches.sgi.com/support/free/security/advisories/20061001-01-P.asc
bugs.php.net/bug.php?id=38322
rhn.redhat.com/errata/RHSA-2006-0688.html
rhn.redhat.com/errata/RHSA-2006-0736.html
secunia.com/advisories/21403
secunia.com/advisories/21467
secunia.com/advisories/21546
secunia.com/advisories/21608
secunia.com/advisories/21683
secunia.com/advisories/21768
secunia.com/advisories/21847
secunia.com/advisories/22004
secunia.com/advisories/22039
secunia.com/advisories/22069
secunia.com/advisories/22440
secunia.com/advisories/22487
secunia.com/advisories/22538
secunia.com/advisories/23247
security.gentoo.org/glsa/glsa-200608-28.xml
securityreason.com/securityalert/1341
securitytracker.com/id?1016984
support.avaya.com/elmodocs2/security/ASA-2006-221.htm
support.avaya.com/elmodocs2/security/ASA-2006-222.htm
support.avaya.com/elmodocs2/security/ASA-2006-223.htm
www.mandriva.com/security/advisories?name=MDKSA-2006:144
www.novell.com/linux/security/advisories/2006_19_sr.html
www.novell.com/linux/security/advisories/2006_20_sr.html
www.novell.com/linux/security/advisories/2006_22_sr.html
www.novell.com/linux/security/advisories/2006_52_php.html
www.php.net/ChangeLog-5.php#5.1.5
www.php.net/release_5_1_5.php
www.plain-text.info/sscanf_bug.txt
www.redhat.com/support/errata/RHSA-2006-0669.html
www.redhat.com/support/errata/RHSA-2006-0682.html
www.securityfocus.com/archive/1/442438/30/0/threaded
www.securityfocus.com/bid/19415
www.ubuntu.com/usn/usn-342-1
www.vupen.com/english/advisories/2006/3193
oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A11062