11-05-2007
Sipera VIPER Lab Reveals Vonage Users Vulnerable
Sipera VIPER(TM) Lab Press Release
Sipera VIPER(TM) Lab, operated by Sipera Systems, the leader in comprehensive VoIP/UC security solutions, today disclosed multiple threat advisories for users of VoIP services and equipment from Vonage, Globe7 and Grandstream. Among other threats, unwitting VoIP users face eavesdropping, spam, spoofing and denial-of-service (DoS) attacks. Full details on these vulnerabilities are posted as an educational security service to Sipera’s customers and the
general public at http://www.sipera.com/viper.
Sipera VIPER Lab determined the Vonage VoIP Motorola Phone Adapter (VT 2142-VD) and Vonage service implementations leave users vulnerable to a form of VoIP identity theft, allowing hackers to take over a user’s phone service with a “registration replay attack,” then make and receive calls while impersonating the victim. Incomplete security practices, such as not encrypting traffic, open Vonage users to eavesdropping on private voice and video communications. Hackers can also send multiple SIP INVITE messages to a user, an Internet version of “ringing the phone off the hook” which creates a DoS attack. Leveraging these vulnerabilities, remote attackers can also send malicious messages directly to Vonage users, subjecting them to spam, social engineering and VoIP scams. (more…)








