osCommerce 3.0.2 - Persistent Cross-Site Scripting

Title:
======
OSCommerce v3.0.2 - Persistent Cross Site Vulnerability


Date:
=====
2012-02-02



VL-ID:
=====
407


Introduction:
=============
osCommerce is the leading Open Source online shop e-commerce solution that is available for free under the 
GNU General Public License. It features a rich set of out-of-the-box online shopping cart functionality that 
allows store owners to setup, run, and maintain their online stores with minimum effort and with no costs, 
license fees, or limitations involved.
The goal of the osCommerce project is to continually evolve by attracting a community that supports the ongoing 
development of the project at its core level and extensively through contributions to provide additional 
functionality to the already existing rich feature set.
Everything you need to get started in selling physical and digital goods over the internet, from the Catalog frontend 
that is presented to your customers, to the Administration Tool backend that completely handles your products, 
customers, orders, and online store data. 

(Copy of the Vendor Homepage: http://www.opensourcecms.com/scripts/details.php?scriptid=94&name=osCommerce)


Abstract:
=========
Vulnerability-Lab Team (F0x) discovered a persistent Cross Site Scripting Vulnerability on the OSCommerce Shop Software.


Report-Timeline:
================
2012-02-02:	Public or Non-Public Disclosure


Status:
========
Published


Affected Products:
==================

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


Severity:
=========
Medium


Details:
========
Multiple persistant cross site vulnerabilities are detected on the OSCommerce v3.0.2. 
The bug allows remote attacker to implement malicious script code on the application side.
Successful exploitation of the vulnerability allows an attacker to manipulate specific modules & can 
lead to session hijacking (user/mod/admin).

Vulnerable Module(s):
                                                            [+]index.php?Cart


Proof of Concept:
=================
The vulnerability can be exploited by local low privileged user account with required medium user inter action. For demonstration or reproduce ...

PoC:
 "'><img src=vul onerror=alert('vulnerabilitylab')> in the "front" field of the shirt module.

Output: 
Size: Medium<br/>- Front: "'><img src=vul onerror=alert('vulnerabilitylab')>


Risk:
=====
The security risk of the persistent vulnerability is estimated as medium.


Credits:
========
Vulnerability Research Laboratory - Alexander Fuchs (F0x23)


Disclaimer:
===========
The information provided in this advisory is provided as it is without any warranty. Vulnerability-Lab disclaims all warranties, 
either expressed or implied, including the warranties of merchantability and capability for a particular purpose. Vulnerability-
Lab or its suppliers are not liable in any case of damage, including direct, indirect, incidental, consequential loss of business 
profits or special damages, even if Vulnerability-Lab or its suppliers have been advised of the possibility of such damages. Some 
states do not allow the exclusion or limitation of liability for consequential or incidental damages so the foregoing limitation 
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Lab. Permission to electronically redistribute this alert in its unmodified form is granted. All other rights, including the use of 
other media, are reserved by Vulnerability-Lab or its suppliers.

    						Copyright � 2012|Vulnerability-Lab


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