Mandriva Linux Security Advisory 2009-090 – The JSON_parser function (ext/json/JSON_parser.c) in PHP 5.2.x before 5.2.9 allows remote attackers to cause a denial of service (segmentation fault) via a malformed string to the json_decode API function. The updated packages have been patched to correct these issues.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/76550/MDVSA-2009-090.txt
Source: https://packetstormsecurity.com/files/76550/Mandriva-Linux-Security-Advisory-2009-090.html