Description
The Thomson/Alcatel SpeedTouch 7G router, as used for the BT Home Hub 6.2.6.B and earlier, allows remote attackers on an intranet to bypass authentication and gain administrative access via vectors including a '/' (slash) character at the end of the PATH_INFO to cgi/b, aka "double-slash auth bypass." NOTE: remote attackers outside the intranet can exploit this by leveraging a separate CSRF vulnerability. NOTE: SpeedTouch 780 might also be affected by some of these issues.
References
- http://www.gnucitizen.org/blog/holes-in-embedded-devices-authentication-bypass-pt-1/
- 20080301 The Router Hacking Challenge is Over! mailing-list
- http://www.gnucitizen.org/projects/router-hacking-challenge/
- 3213 third-party-advisory
- 25972 vdb-entry
- bthomehub-cgib-auth-bypass(41271) vdb-entry
- 20071008 BT Home Flub: Pwnin the BT Home Hub mailing-list
- http://www.gnucitizen.org/blog/bt-home-flub-pwnin-the-bt-home-hub
- http://www.theregister.co.uk/2007/10/09/bt_home_hub_vuln/