Buffer overflow in the confirm_phpdoc_compiled function in the phpDOC extension (PECL phpDOC) in PHP 5.2.1 allows context-dependent attackers to execute arbitrary code via a long argument string.
https://www.exploit-db.com/exploits/3576
https://exchange.xforce.ibmcloud.com/vulnerabilities/33236
http://www.securityfocus.com/bid/23124
http://www.securityfocus.com/archive/1/463843/100/0/threaded