PHP before 5.2.12 and 5.3.x before 5.3.1 does not restrict the number of temporary files created when handling a multipart/form-data POST request, which allows remote attackers to cause a denial of service (resource exhaustion), and makes it easier for remote attackers to exploit local file inclusion vulnerabilities, via multiple requests, related to lack of support for the max_file_uploads directive.
https://exchange.xforce.ibmcloud.com/vulnerabilities/54455
http://www.php.net/releases/5_3_1.php
http://www.php.net/releases/5_2_12.php
http://www.php.net/ChangeLog-5.php
http://www.openwall.com/lists/oss-security/2009/11/20/7
http://www.openwall.com/lists/oss-security/2009/11/20/2
http://www.debian.org/security/2009/dsa-1940
http://www.acunetix.com/blog/websecuritynews/php-multipartform-data-denial-of-service/
http://support.apple.com/kb/HT4077
http://seclists.org/fulldisclosure/2009/Nov/228
http://news.php.net/php.announce/79
http://marc.info/?l=bugtraq&m=127680701405735&w=2
http://lists.apple.com/archives/security-announce/2010//Mar/msg00001.html