Arhont Ltd. - Information Security Arhont Advisory by: Andrei Mikhailovsky (www.arhont.com) Advisory: Belkin Wireless Router Authentication Vulnerability Router Model Name: F5D7232-4 and F5D7230-4 Model Specific: Other models are likely to be vulnerable Manufacturer site: http://www.belkin.com SUMMARY: A serious security vulnerability have been found in authentication system of Belkin Wireless Routers. The vulnerability has been confirmed in Belkin Wireless Routers models F5D7232-4 and F5D7230-4 with latest firmware 4.05.03 and with firmware 4.03.03. Previous firmware versions are also likely to be effected. Other Belkin wireless devices are likely to be vulnerable. VULNERABILITY DESCRIPTION: While a legitimate device administrator is logged into the router's web management interface, any other user/attacker can access, view and change router's web configuration without authentication from any network address. This presents an opportunistic vector of attack on the device in question. Risk Factor: High/Medium WORKAROUNDS: At the release time of this advisory, Belkin didn't have an update that solves the issue. It is advised to filter all requests to web administration interface of the device. COMMUNICATION HISTORY: Manufacturer notified on 11th of October 2005 ADDITIONAL INFORMATION: *According to the Arhont Ltd. policy, all of the found vulnerabilities and security issues will be reported to the manufacturer at least 7 days before releasing them to the public domains (such as CERT and BUGTRAQ). The delay of the public release might be negotiated with the manufacturer providing reasonable justifications have been given from the manufacturer side. If you would like to get more information about this issue, please do not hesitate to contact Arhont team on info[_-at-_]arhont[_-dot-_]com -- Andrei Mikhailovsky Arhont Ltd - Information Security Web: http://www.arhont.com http://www.wi-foo.com Tel: +44 (0)870 4431337 Fax: +44 (0)117 9690141 PGP: Key ID - 0x2B3438DE PGP: Server - keyserver.pgp.com