<<< Date Index >>>     <<< Thread Index >>>

Re: [Full-disclosure] Firefox: serious cookie stealing / same-domain bypass vulnerability

This vuln is not exploitable in this condition against IIS server 6
and possibly earlier versions.  IIS will die on the null character in
the new request.  It doesn't seem like anyone has brought up this
fact.

Example (IIS): location.hostname='microsoft.com\x00www.coredump.cx';

Output:
microsoft.com returns '400 Bad Request.'.

Any input would be appreciated until the obvious patch comes out.

Regards,
base


On 2/15/07, pdp (architect) <pdp.gnucitizen@xxxxxxxxxxxxxx> wrote:

weird, firefox slowly dies out

t2.html
<html>
        <body>
                <iframe src="t1.html"></iframe>
        </body>
</html>

t1.html
<html>
        <body>
                <script>location.hostname="blog.com";</script>
        </body>
</html>


On 2/15/07, pdp (architect) <pdp.gnucitizen@xxxxxxxxxxxxxx> wrote:
> the first one runs in about:blank which is restricted. the second one
> is very interesting but still not very useful because it acts like
> about:blank. hmmm it seams that the hostname field has been seriously
> overlooked.
>
> On 2/15/07, Michal Zalewski <lcamtuf@xxxxxxxxxxxx> wrote:
> > On Thu, 15 Feb 2007, pdp (architect) wrote:
> >
> > > I wander whether we can execute code on about:config or about:cache.
> >
> > Actually, there are several odd problems related to location updates and
> > location.hostname specifically, including one scenario that apparently
> > makes the script run with document.location in about: namespace.
> >
> > I did not research them any further, so I can't say if they're
> > exploitable - but you can see a demo here, feel free to poke around:
> >
> >   http://lcamtuf.coredump.cx/fftests.html
> >
> > Cheers,
> > /mz
> > http://lcamtuf.coredump.cx/
> >
>
>
> --
> pdp (architect) | petko d. petkov
> http://www.gnucitizen.org
>


--
pdp (architect) | petko d. petkov
http://www.gnucitizen.org