php-cgi is susceptible to arbitrary code execution. An attacker can inject arbitrary script because it does not properly handle the query strings without an = (equals sign) character, leading to malicious code execution with the privileges of the PHP interpreter.
eindbazen.net/2012/05/php-cgi-advisory-cve-2012-1823/
h20000.www2.hp.com/bizsupport/TechSupport/Document.jsp?objectID=c03360041
lists.apple.com/archives/security-announce/2012/Sep/msg00004.html
lists.opensuse.org/opensuse-security-announce/2012-05/msg00002.html
lists.opensuse.org/opensuse-security-announce/2012-05/msg00007.html
lists.opensuse.org/opensuse-security-announce/2012-05/msg00011.html
marc.info/?l=bugtraq&m=134012830914727&w=2
rhn.redhat.com/errata/RHSA-2012-0546.html
rhn.redhat.com/errata/RHSA-2012-0547.html
rhn.redhat.com/errata/RHSA-2012-0568.html
rhn.redhat.com/errata/RHSA-2012-0569.html
rhn.redhat.com/errata/RHSA-2012-0570.html
secunia.com/advisories/49014
secunia.com/advisories/49065
secunia.com/advisories/49085
secunia.com/advisories/49087
support.apple.com/kb/HT5501
www.debian.org/security/2012/dsa-2465
www.kb.cert.org/vuls/id/520827
www.kb.cert.org/vuls/id/673343
www.mandriva.com/security/advisories?name=MDVSA-2012:068
www.php.net/archive/2012.php#id2012-05-03-1
www.php.net/ChangeLog-5.php#5.4.2
www.securitytracker.com/id?1027022
access.redhat.com/security/updates/classification/#critical
bugs.php.net/bug.php?id=61910
bugs.php.net/patch-display.php?bug_id=61910&patch=cgi.diff&revision=1335984315&display=1
rhn.redhat.com/errata/RHSA-2012-0546.html