PHP versions 5.2.3 and below and 4.4.7 and below suffer from a safemode and open_basedir bypass vulnerability.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/57331/php523447-bypass.txt
Source: https://packetstormsecurity.com/files/57331/php523447-bypass.txt.html