Barracuda CudaTel 2.6.02.04 Cross Site Scripting

`Title:  
======  
Barracuda CudaTel 2.6.02.04 - Multiple Client Side Cross Site Vulnerabilities (Bug Bounty #17)  
  
  
  
Date:  
=====  
2013-07-17  
  
  
References:  
===========  
http://vulnerability-lab.com/get_content.php?id=779  
  
BARRACUDA NETWORK SECURITY ID: BNSEC-815  
  
  
VL-ID:  
=====  
779  
  
  
Common Vulnerability Scoring System:  
====================================  
2.5  
  
  
Introduction:  
=============  
Designed to enable seamless voice and video communication, the CudaTel Communication Server is an easy-to-use,   
affordable, next-generation phone system for businesses. CudaTel Communication Server s enterprise-class   
feature set includes Voice over IP (VoIP) PBX services, conferencing, follow-me, automated attendant services,   
and more, controlled by an easy-to-use Web interface. CudaTel Communication Server is compatible with any SIP   
device and provider, and can be pre-configured for use with both analog and digital telephone networks. Powerful,   
Complete Solution With an expansive feature set and and no per user or phone licensing fees, the CudaTel   
Communication Server is equipped and priced for organizations of any size. Native High Definition audio support   
and integrated phone line (TDM) hardware produces an unparalleled audio experience. VOIP encryption protects calls   
from hackers and digital eavesdroppers.  
  
(Copy of the Vendor Homepage: http://www.cudatel.com )  
  
  
Abstract:  
=========  
The Vulnerability Laboratory Research Team discovered multiple client side web vulnerabilities in Barracuda Networks CudaTel v2.6.002.040 appliance application.  
  
  
Report-Timeline:  
================  
2012-11-26: Researcher Notification & Coordination (Benjamin Kunz Mejri)  
2012-11-29: Vendor Notification (Barracuda Networks Security Team - Bug Bounty Program)  
2012-12-01: Vendor Response/Feedback (Barracuda Networks Security Team)  
2013-04-07: Vendor Fix/Patch Confirmed (Barracuda Networks Developer Team) [Manager: Dave Farrow]  
2012-07-17: Public Disclosure (Vulnerability Laboratory)  
  
  
Status:  
========  
Published  
  
  
Affected Products:  
==================  
Barracuda Networks  
Product: CudaTel - Communication Server 2.6.002.040  
  
  
Exploitation-Technique:  
=======================  
Remote  
  
  
Severity:  
=========  
Medium  
  
  
Details:  
========  
Multiple client side input validation vulnerabilities are detected in Barracuda Networks CudaTel v2.6.002.040 appliance application.  
The non-persistent vulnerabilities allows an attacker (remote) to manipulate client side application to browser requests.  
  
The first vulnerability (client side) is located in the gui route module when processing to request the vulnerable   
bbx_outbound_route_name parameter & affected listing. The route module allows remote attackers via bbx_outbound_route_flag_locked   
parameter to request and execute script codes in the bbx_outbound_route_name listing.  
  
The secound vulnerability (client side) is located in the ajax - html module when processing to request the vulnerable   
queues_wall_stub file and the ops opOpenQueueWallboard link parameters. The vulnerability allows remote attackers (client side)   
to change the link of the Queue Monitor Board on requests to redirect.  
  
The third vulnerability (client side) is located in the Web login attempt fail exception-handling of eventlog module when   
processing to load the manipulated bbx_eventlog_message parameter. The vulnerability allows remote attackers to execute own   
script code (client side) in the queues_wall_stub.html file from the exception-handling location for Web login attempt fails.  
  
Exploitation of the vulnerability requires a low privilege application user account and medium or high user interaction.  
Successful exploitation of the vulnerabilities result in client side phishing, client side session hijacking, client side   
external redirects to malware or evil websites and client side module context manipulation.  
  
Vulnerable Section(s):  
[+] GUI - ROUTE  
[+] AJAX - HTML  
[+] Eventlog  
  
Vulnerable Module(s):  
[+] route - Listing  
[+] queues_wall_stub - Monitor Queue Link  
[+] eventlog - Web login attempt fail (Exception Handling) - Listing   
  
Vulnerable Parameter(s):  
[+] bbx_outbound_route_flag_locked > bbx_outbound_route_name  
[+] ops opOpenQueueWallboard  
[+] bbx_eventlog_message  
  
  
Proof of Concept:  
=================  
The client side input validation vulnerabilities can be exploited by remote attackers without required application user account and with   
medium or high required user interaction. For demonstration or reproduce ...  
  
1.1  
Review: GUI - ROUTE > route - Listing > bbx_outbound_route_flag_locked [PARAMETER]> bbx_outbound_route_name [LISTING]  
-   
bbx_domain_id: 6  
bbx_outbound_route_flag_locked: 0  
bbx_outbound_route_id: 14  
bbx_outbound_route_name: [CLIENT-SIDE SCRIPT CODE!]  
bbx_outbound_route_regex: "^\\d{10}$"  
bbx_outbound_route_type: national  
</pre></body></html></iframe>​​​​​</pre>  
  
  
PoC:  
http://cudatel.127.0.0.1:1338/gui/route/route?%3C[CLIENT-SIDE SCRIPT CODE!]%20%3C  
http://cudatel.127.0.0.1:1338/gui/route/route?_=1354073910062&bbx_outbound_route_flag_locked=%3C[CLIENT-SIDE SCRIPT CODE!]%20%3C  
  
  
  
1.2  
Review: AJAX - HTML > queues_wall_stub - Monitor Queue Link > ops opOpenQueueWallboard  
  
<h3>Queue Monitor <a class="ops opOpenQueueWallboard" href="#">Large View in New Window</a></h3>  
  
PoC:  
http://cudatel.127.0.0.1:1338/ajax-html/queues_wall_stub.html?_=1354074247075%20%3C[CLIENT-SIDE SCRIPT CODE!]%20%3C#  
  
  
  
1.3  
Review: Eventlog > eventlog - Web login attempt fail (Exception Handling) - Listing > bbx_eventlog_message  
-   
bbx_eventlog_date_time: 2012-11-26 15:25:59  
bbx_eventlog_email_sent: 0  
bbx_eventlog_fullname: Admin  
bbx_eventlog_id: 2823  
bbx_eventlog_ip_addr: 178.200.236.201  
bbx_eventlog_message: Web login attempt fail for <[x]>%20%20split%20%20"><[CLIENT-SIDE SCRIPT CODE!]") < from 178.200.236.201  
bbx_eventlog_priority: notice  
bbx_eventlog_user_agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:17.0) Gecko/17.0 Firefox/17.0  
bbx_user_id: 1  
-   
  
PoC:  
http://cudatel.127.0.0.1:1338/gui/eventlog/eventlog?%3Cx%3E%20%20%20%20%22%3E%3C[CLIENT-SIDE SCRIPT CODE!]%20%3C  
  
  
Reference(s):  
http://cudatel.ptest.cudasvc.com/gui/route/route  
http://cudatel.ptest.cudasvc.com/ajax-html/queues_wall_stub.html  
http://cudatel.ptest.cudasvc.com/gui/eventlog/eventlog  
  
  
Risk:  
=====  
The security risk of the (multiple) client side input validation vulnerabilities are estimated as medium.  
  
  
Credits:  
========  
Vulnerability Laboratory [Research Team] - Benjamin Kunz Mejri ([email protected])  
  
  
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===========  
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