full-disclosure - Re: Firefox: serious cookie stealing / same-domain bypass vulnerability

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Date: Thu, 15 Feb 2007 23:31:01 -0800
From: Base64 <base640@...il.com>
To: "pdp (architect)" <pdp.gnucitizen@...glemail.com>
Cc: full-disclosure@...ts.grok.org.uk, bugtraq@...urityfocus.com
Subject: Re: 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@...glemail.com> 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@...glemail.com> 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@...ne.ids.pl> 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
>

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