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2004: 3,100 advisories published
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TITLE:
BT Home Hub/Thomson SpeedTouch 7G Multiple Vulnerabilities and
Security Issue

SECUNIA ADVISORY ID:
SA27651

VERIFY ADVISORY:
http://secunia.com/advisories/27651/

CRITICAL:
Moderately critical

IMPACT:
Security Bypass, Cross Site Scripting

WHERE:
>From remote

OPERATING SYSTEM:
BT Home Hub/Thomson SpeedTouch 7G 6.x
http://secunia.com/product/16515/

DESCRIPTION:
Adrian Pastor has reported some vulnerabilities and a security issue
in BT Home Hub/Thomson SpeedTouch 7G routers, which can be exploited
by malicious people to conduct cross-site scripting, cross-site
request forgery, and script insertion attacks, and to bypass certain
security restrictions.

1) An input validation error when processing URLs can be exploited to
e.g. gain access and apply changes to password-protected resources
(e.g. configuration and settings pages) via a specially-crafted URL
containing double forward slashes.

2) Input passed via the login username is not properly sanitised
before being logged. This can be exploited to insert arbitrary HTML
and script code, which will be executed in a user's browser session
in context of an affected site when a malicious log is viewed.

3) Input passed to the "name" parameter is not properly sanitised
before being returned to the user. This can be exploited to execute
arbitrary HTML and script code in a user's browser session in context
of an affected site.

This is similar to:
SA19069

4) Input passed to the "url" parameter in cgi/b/ic/connect/ is not
properly sanitised before being returned to the user. This can be
exploited to execute arbitrary HTML and script code in a user's
browser session in context of an affected site.

5) Users are able to perform certain actions via HTTP requests
without the device performing any validity checks to verify the
request. This can be exploited to e.g. change the administrator
password by enticing a logged-in administrator to visit a malicious
site.

6) Certain pages (e.g. Wireless Security page) can be accessed
without authentication by directly accessing the URL.

It is also possible for an admin user to save and backup or load a
config file, which is supposed to be only accessible by the tech
account, by directly accessing certain URLs.

The vulnerabilities and security issue are reported in firmware
version 6.2.2.6. Other versions may also be affected.

SOLUTION:
Security issue #6 has reportedly been fixed in firmware version
6.2.6.B.

Do not follow untrusted links or browse untrusted websites.

Use the device in a trusted network environment only.

PROVIDED AND/OR DISCOVERED BY:
Adrian Pastor

ORIGINAL ADVISORY:
http://www.gnucitizen.org/blog/bt-home-flub-pwnin-the-bt-home-hub-4

OTHER REFERENCES:
SA19069:
http://secunia.com/advisories/19069/

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