Title:
==
Barracuda CudaTel 2.6.02.04 - Persistent Web Vulnerability
Date:
=
2013-06-21
References:
===
http://vulnerability-lab.com/get_content.php?id=777
BARRACUDA NETWORK SECURITY ID: BNSEC-834
VL-ID:
=
777
Common Vulnerability Scoring System:
3.5
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.barracudanetworks.ca/cudatel.aspx )
Abstract:
=
The Vulnerability Laboratory Research Team discovered a client side web
vulnerability in Barracuda Networks CudaTel v2.6.002.040 appliance application.
Report-Timeline:
2012-11-26: Researcher Notification & Coordination (Chokri Ben Achour)
2012-11-27: Vendor Notification (Barracuda Networks Security Team - Bug
Bounty Program)
2013-04-03: Vendor Response/Feedback (Barracuda Networks Security Team -
Bug Bounty Program)
2013-05-02: Vendor Fix/Patch (Barracuda Networks Developer Team)
[Coordination: Dave Farrow]
2012-06-00: Public Disclosure (Vulnerability Laboratory)
Status:
Published
Affected Products:
==
Barracuda Networks
Product: CudaTel - Communication Server 2.6.002.040
Exploitation-Technique:
===
Remote
Severity:
=
Medium
Details:
The vulnerability laboratory research team discovered a persistent web
vulnerability in Barracuda Networks CudaTel v2.6.002.040 appliance application.
The input validation vulnerability allows remote attackers to inject own
malicious persistent script code on application side of the vulnerable module.
The vulnerability is located in the `find me` module of the `call forwarding`
function when processing to request manipulated parameters via `add listing`.
Local low privilege application user accounts can inject persistent script code
to exploit higher privilege web application accounts.
The remote bug can be exploited by remote attacker with low privileged
application user account and low required userinteraction. Successful
exploitation
of the vulnerabilities result in persistent session hijacking, persistent
persistent external redirects to malware or malicious sites, persistent
phishing
and persistent web context manipulation (vulnerable module).
Vulnerable Section(s):
[+] Find Me
Vulnerable Module(s):
[+] Call Forwarding - Add
Vulnerable Parameter(s):
[+] Calling Sequence - Listing
Proof of Concept:
=
Solution:
=
The vulnerability can be patched by parsing the listed (output) web context
after processing to add.
restrict also the input fields and disallow special chars or wrong strings.
2013-05-02: Vendor Fix/Patch (Barracuda Networks Developer Team)
[Coordination: Dave Farrow]
Risk:
=
The security risk of the persistent input validation vulnerability is estimated
as medium.
Credits:
Vulnerability Laboratory [Research Team] - Chokri Ben Achour
(meis...@vulnerability-lab.com)
Disclaimer:
===
The information provided in this advisory is provided as it is without any
warranty. Vulnerability-Lab disclaims all warranties,
either expressed or implied, including the warranties of merchantability and
capability for a particular purpose. Vulnerability-
Lab or its suppliers are not liable in any case of damage, including direct,
indirect, incidental, consequential loss of business
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been advised of the possibility of such damages. Some
states do not allow the exclusion or limitation of liability for consequential
or incidental damages so the foregoing limitation
may not apply. We do not approve or encourage anybody to break any vendor
licenses, policies, deface websites, hack into databases
or trade with fraud/stolen material.
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