PHP before 5.2.12 does not properly handle session data, which has unspecified impact and attack vectors related to (1) interrupt corruption of the SESSION superglobal array and (2) the session.save_path directive.
lists.apple.com/archives/security-announce/2010//Mar/msg00001.html
marc.info/?l=bugtraq&m=127680701405735&w=2
secunia.com/advisories/37821
secunia.com/advisories/38648
secunia.com/advisories/40262
secunia.com/advisories/41480
secunia.com/advisories/41490
support.apple.com/kb/HT4077
www.debian.org/security/2010/dsa-2001
www.itrc.hp.com/service/cki/docDisplay.do?docId=emr_na-c02512995
www.mandriva.com/security/advisories?name=MDVSA-2010:045
www.php.net/ChangeLog-5.php
www.php.net/releases/5_2_12.php
www.securityfocus.com/bid/37390
www.vupen.com/english/advisories/2009/3593
oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A7439