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Category:   Device (Embedded Server/Appliance)  >   Barracuda Spam Firewall Vendors:   Barracuda Networks
Barracuda Spam Firewall Input Validation Hole in 'ldap_test.cgi' Permits Cross-Site Scripting Attacks
SecurityTracker Alert ID:  1020108
SecurityTracker URL:  http://securitytracker.com/id/1020108
CVE Reference:   CVE-2008-2333   (Links to External Site)
Date:  May 22 2008
Impact:   Disclosure of authentication information, Disclosure of user information, Execution of arbitrary code via network, Modification of user information
Fix Available:  Yes  Vendor Confirmed:  Yes  Exploit Included:  Yes  
Version(s): prior to 3.5.11.025
Description:   A vulnerability was reported in Barracuda Spam Firewall. A remote user can conduct cross-site scripting attacks.

The 'ldap_test.cgi' script does not properly filter HTML code from user-supplied input in the 'email' parameter before displaying the input. A remote user can create a specially crafted URL that, when loaded by a target user, will cause arbitrary scripting code to be executed by the target user's browser. The code will originate from the Barracuda Spam Firewall interface and will run in the security context of that site. As a result, the code will be able to access the target user's cookies (including authentication cookies), if any, associated with the site, access data recently submitted by the target user via web form to the site, or take actions on the site acting as the target user.

A demonstration exploit URL is provided:

https://[target]/cgi-bin/ldap_test.cgi?host=127.0.0.1&port=1&tl
s_mode=tls_mode&tls_require=&username=&password=&filter=&searchbase=&uni
que_attr=&email_attr=&domain=*&email=%3Cscript%3Ealert(document.cookie)%
3C/script%3E

The vendor was notified on April 24, 2008.

Information Risk Management Plc. reported this vulnerability.

Impact:   A remote user can access the target user's cookies (including authentication cookies), if any, associated with the Barracuda Spam Firewall, access data recently submitted by the target user via web form to the site, or take actions on the site acting as the target user.
Solution:   The vendor has issued a fixed version (3.5.11.025).
Vendor URL:  www.barracudanetworks.com/ (Links to External Site)
Cause:   Input validation error
Underlying OS:  

Message History:   None.


 Source Message Contents

Date:  Thu, 22 May 2008 17:14:33 +0100
Subject:  [Full-disclosure] IRM Security Advisory : Barracuda Networks Spam

Barracuda Networks Spam Firewall Cross-Site Scripting Vulnerability
CVE Number: CVE-2008-2333


Vulnerability Type / Importance: Cross-Site Scripting (Reflected) /
Medium

Problem Discovered 24 April 2008
Vendor Contacted 24 April 2008
Advisory Published 22 May 2008

Abstract
The Barracuda Spam Firewall device web administration interface is
vulnerable to a reflected cross-site scripting vulnerability which may
allow theft of administrative credentials or downloading of malicious
content.

Description:

The Barracuda device presents LDAP testing functionality via a script
called 'ldap_test.cgi'. The script does not sufficiently validate
user-supplied input within the 'email' parameter. As a result,
client-supplied script code can be injected into the 'email' parameter
that would execute in the browser within the security context of the
Barracuda device.
Vendor information:
http://www.barracudanetworks.com/ns/support/tech_alert.php

Proof of Concept:

https://<vulnerable_host>/cgi-bin/ldap_test.cgi?host=127.0.0.1&port=1&tl
s_mode=tls_mode&tls_require=&username=&password=&filter=&searchbase=&uni
que_attr=&email_attr=&domain=*&email=%3Cscript%3Ealert(document.cookie)%
3C/script%3E

Mitigation:

Access to the web management application can be limited by IP address.
Firmware release 3.5.11.025 has been released by the vendor to address
this issue; however the patch has not been tested by IRM.

Tested/Affected Versions:

IRM confirmed the presence of this vulnerability in Barracuda Spam
Firewall 600 Firmware 3.5.11.020.
The vendor has confirmed the issue exists in all versions prior to
3.5.11.025.

Credits

Research and Advisory: Information Risk Management Plc.

About IRM:

Information Risk Management Plc (IRM) is a vendor independent
information risk consultancy, founded in 1998. IRM has become a leader
in client side risk assessment, technical level auditing and in the
research and development of security vulnerabilities and tools. IRM is
headquartered in London with Technical Centres in Europe and Asia as
well as Regional Offices in the Far East and North America. Please visit
our website at www.irmplc.com for further information.

Disclaimer:

All information in this advisory is provided on an 'as is' basis in the
hope that it will be useful. Information Risk Management Plc is not
responsible for any risks or occurrences caused by the application of
this information.

_______________________________________________
Full-Disclosure - We believe in it.
Charter: http://lists.grok.org.uk/full-disclosure-charter.html
Hosted and sponsored by Secunia - http://secunia.com/

 
 


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