Barracuda CudaTel 2.6.02.04 - Persistent Web Vulnerability
BARRACUDA NETWORK SECURITY ID: BNSEC-834
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 )
The Vulnerability Laboratory Research Team discovered a client side web vulnerability in Barracuda Networks CudaTel v2.6.002.040 appliance application.
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)
Barracuda Networks Product: CudaTel - Communication Server 2.6.002.040
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
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]
The security risk of the persistent input validation vulnerability is estimated as medium.
Vulnerability Laboratory [Research Team] - Chokri Ben Achour (firstname.lastname@example.org)
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