Document Title:
===============
Barracuda IMFirewall 620 - Input Validation Vulnerability


Date:
=====
2011-03-16


References:
===========
EDB-ID: 10347 (http://www.exploit-db.com/exploits/10347/)


VL-ID:
=====
178


Introduction:
=============
Barracuda Networks - Worldwide leader in email and Web security. T
 
he Barracuda Web Application Firewall is a complete and powerful security solution for Web applications and Web sites.
The Barracuda Web Application Firewall provides award-winning protection against hackers leveraging protocol or application
vulnerabilities to instigate data theft, denial of service or defacement of your Web site. The Barracuda Web Application
Firewall protects Web applications and Web services from malicious attacks,  and can also increase the performance and scalability of
these applications. The Barracuda Web Application Firewall offers every capability needed to deliver, secure and
manage enterprise Web applications from a single appliance through an intuitive, real-time user interface.
 
    * Single point of protection for inbound and outbound traffic for all Web applications
    * Protects Web sites and Web applications against application layer attacks
    * Delivers best practices security right out of the box
    * Monitors traffic and provides reports about attackers and attack attempts
 
The Barracuda IM Firewall is the first product to provide everything an organization needs to control and manage internal
and external instant messaging (IM) traffic. It combines an integrated IM server and gateway solution that is powerful,
easy to use and affordable for businesses of all sizes. Installing in minutes, it can easily and completely identify and
manage both internal and public IM traffic within your organization. Using the Barracuda IM Firewall, your organization
can eliminate the security, virus, or compliance risks of instant messaging while harnessing the communications and productivity
benefits for which IM has become an indispensable asset.
 
(Copy of the Vendor Homepage: http://www.barracudanetworks.com/ns/products/im_overview.php)


Abstract:
=========
Vulnerability-Lab Team dicovered an input validation vulnerability on the Barracuda - Web Application Firewall 660 (Appliance).


Report-Timeline:
================
2009-12-07:	Public or Non-Public Disclosure


Status:
========
Published


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

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


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


Details:
========
A persistent Input Validation Vulnerability is detected on IMFW620 of Barracuda. An attacker is able
to include own malicious persistent script code to manipulate application content(Example;JS;PHP). 
When exploited by an authenticated user, the identified vulnerabilities can lead to Information Disclosure, 
Session Hijack, access to Intranet available servers.

 
Vulnerable Modules: 
                                                    [+] SMTP Mail
 
Pictures:
            http://img704.imageshack.us/img704/4266/imfirewall1.png
            http://img706.imageshack.us/img706/3089/imfirewall2.png
 


Proof of Concept:
=================
The vulnerabilities can be exploited by potencial attackers. For demonstration ...

Reference:
 
http://test-server.com/cgi-mod/smtp_test.cgi?locale=en_US&host=undefined&port=undefined&domain=
undefined&email=[Input Validation Vulnerability]&hostname=[Input Validation Vulnerability]&default_domain=
[Input Validation Vulnerability]&user=guest&password=40aab35d3c647ad41f9e154ea7f15d13&et=1260212946
 
To bypass the restriction of the email filter use a  string like ... >"<script>[Code]</script>@mailserver.com



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


Credits:
========
Vulnerability Research Laboratory


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===========
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