PHP is vulnerable to remote code execution (RCE). It was discovered that the fix for CVE-2011-4885 (released via RHSA-2012:0071, RHSA-2012:0033, and RHSA-2012:0019 for php packages in Red Hat Enterprise Linux 4, 5, and 6 respectively) introduced an uninitialized memory use flaw. A remote attacker could send a specially-crafted HTTP request to cause the PHP interpreter to crash or, possibly, execute arbitrary code.
h20000.www2.hp.com/bizsupport/TechSupport/Document.jsp?objectID=c03360041
lists.apple.com/archives/security-announce/2012/May/msg00001.html
lists.opensuse.org/opensuse-security-announce/2012-03/msg00013.html
lists.opensuse.org/opensuse-security-announce/2012-03/msg00016.html
marc.info/?l=bugtraq&m=134012830914727&w=2
openwall.com/lists/oss-security/2012/02/02/12
openwall.com/lists/oss-security/2012/02/03/1
rhn.redhat.com/errata/RHSA-2012-0092.html
secunia.com/advisories/47801
secunia.com/advisories/47806
secunia.com/advisories/47813
secunia.com/advisories/48668
securitytracker.com/id?1026631
support.apple.com/kb/HT5281
svn.php.net/viewvc?view=revision&revision=323007
thexploit.com/sec/critical-php-remote-vulnerability-introduced-in-fix-for-php-hashtable-collision-dos/
www.debian.org/security/2012/dsa-2403
www.h-online.com/security/news/item/Critical-PHP-vulnerability-being-fixed-1427316.html
www.osvdb.org/78819
www.php.net/ChangeLog-5.php#5.3.10
www.securityfocus.com/bid/51830
access.redhat.com/errata/RHSA-2012:0092
access.redhat.com/errata/RHSA-2012:0093
access.redhat.com/security/cve/CVE-2012-0830
access.redhat.com/security/updates/classification/#critical
bugzilla.redhat.com/show_bug.cgi?id=786686
exchange.xforce.ibmcloud.com/vulnerabilities/72911
gist.github.com/1725489