Buffer underflow in PHP before 5.2.1 allows attackers to cause a denial of service via unspecified vectors involving the sapi_header_op function.
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A11321
https://issues.rpath.com/browse/RPL-1088
http://www.vupen.com/english/advisories/2007/0546
http://www.us.debian.org/security/2007/dsa-1264
http://www.ubuntu.com/usn/usn-424-2
http://www.ubuntu.com/usn/usn-424-1
http://www.trustix.org/errata/2007/0009/
http://www.securitytracker.com/id?1017671
http://www.securityfocus.com/bid/22496
http://www.securityfocus.com/archive/1/461462/100/0/threaded
http://www.redhat.com/support/errata/RHSA-2007-0088.html
http://www.redhat.com/support/errata/RHSA-2007-0082.html
http://www.redhat.com/support/errata/RHSA-2007-0081.html
http://www.redhat.com/support/errata/RHSA-2007-0076.html
http://www.php.net/releases/5_2_1.php
http://www.php.net/ChangeLog-5.php#5.2.1
http://www.openpkg.com/security/advisories/OpenPKG-SA-2007.010.html
http://www.mandriva.com/security/advisories?name=MDKSA-2007:048
http://support.avaya.com/elmodocs2/security/ASA-2007-136.htm
http://support.avaya.com/elmodocs2/security/ASA-2007-101.htm
http://security.gentoo.org/glsa/glsa-200703-21.xml
http://secunia.com/advisories/24642
http://secunia.com/advisories/24606
http://secunia.com/advisories/24514
http://secunia.com/advisories/24432
http://secunia.com/advisories/24421
http://secunia.com/advisories/24419
http://secunia.com/advisories/24322
http://secunia.com/advisories/24295
http://secunia.com/advisories/24284
http://secunia.com/advisories/24248
http://secunia.com/advisories/24236
http://secunia.com/advisories/24217
http://secunia.com/advisories/24195
http://secunia.com/advisories/24089
http://rhn.redhat.com/errata/RHSA-2007-0089.html
http://lists.suse.com/archive/suse-security-announce/2007-Mar/0003.html