WhiteHouse Gov Service - Persistent Web Vulnerability

Document Title:
===============
WhiteHouse Gov Service - Persistent Web Vulnerability


References (Source):
====================
http://www.vulnerability-lab.com/get_content.php?id=308


Release Date:
=============
2011-11-03


Vulnerability Laboratory ID (VL-ID):
====================================
308


Product & Service Introduction:
===============================
http://www.whitehouse.gov/


Abstract Advisory Information:
==============================
The vulnerability-lab researcher (F0x23 & Rem0ve) discovered a persistent script code injection vulnerability on the WhiteHouse Gov website.


Vulnerability Disclosure Timeline:
==================================
2011-11-01:     Vendor Notification
2011-11-03:     Vendor Response/Feedback
2011-11-04:     Vendor Fix/Patch
2011-11-04:     Public or Non-Public Disclosure


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


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


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


Technical Details & Description:
================================
A persistent script code injection vulnerability is detected on the WhiteHouse Gov website. The vulnerability allows remote 
attackers to implement/inject own malicious script code (persistent) on a web service main module of the website. The successful 
exploitation of the vulnerability results in hijacking of user-,admin- or -backend sessions, manipulation of profile content, 
redirect to external malicious targets(websites), defacement & can lead to malware infiltration via petition.


Vulnerable Module(s):
				                        [+] Profil - Location & Name Input + Output

Affected Module(s):
							[+] Petition - Add, Share & Sign

Picture(s):
			                              	../1.png


Proof of Concept (PoC):
=======================
The vulnerabilities can be exploited by remote attackers. For demonstration or reproduce ...

PoC:
<div class="entry entry-creator ">  
    <div class="title">creator</div>    
    <div class="name">Bernd N</div><!--/name-->
    <div class="details">
      "'><INJECT/EXECUTE PERSISTENT SCRIPT CODE HERE!!><br>
      October 31, 2011<br>
      Signature # 1    </div>
          </div>
      </div>

Reference: https://wwws.whitehouse.gov/petitions/!/petition/hey/VLsNrtR1


INPUT FORM:
<span>City: </span></label>
 <input maxlength="255" name="profile_city" id="edit-profile-city" size="60" value="VA" class="form-text" type="text">
</div>
<input name="form_id" id="edit-user-profile-form" value="user_profile_form" type="hidden">
<div class="form-item clearfix" id="edit-profile-state-wrapper">
 <label for="edit-profile-state"><span>State: </span>

Reference: https://wwws.whitehouse.gov/user/5034619/edit/Personal%20Information


PoC:
                                            ../PoC.txt
                                            ../PoC-Full.txt
                                            ../PoC-Input.txt
                                            ../Reference.txt


Solution - Fix & Patch:
=======================
1. Parse the input fields and restrict characters like () > < \" / to prevent against script tag include.
2. Parse also the vulnerable not filtered output section of name & city were the script code will be executed at the end.
3. Possibility: Implement a specific exception-handling or filter mechanism to prevent against future script code injections.


Security Risk:
==============
The security risk of the persistent script code inject is estimated as high(+).


Credits & Authors:
==================
Vulnerability Research Laboratory -  Alexander Fuchs (F0x23) &  Benjamin Kunz Mejri (Rem0ve)


Disclaimer & Information:
=========================
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