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Re: Ray Cromwell: Another Netscape Bug (and possible security (fwd)

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From [email protected]  Thu Sep 28 19:58:59 1995
Approved-By: [email protected]
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Approved-By:  Neil Woods <[email protected]>
Message-ID:  <[email protected]>
Date:         Thu, 28 Sep 1995 04:24:06 +0100
Reply-To: Bugtraq List <[email protected]>
Sender: Bugtraq List <[email protected]>
From: Neil Woods <[email protected]>
Subject:      Re: Ray Cromwell: Another Netscape Bug (and possible security
X-To:         [email protected]
X-cc:         [email protected]
To: Multiple recipients of list BUGTRAQ <[email protected]>
In-Reply-To:  <[email protected]> from "Timothy Newsham"
              at Sep 25, 95 02:45:26 pm

>
> > >On my BSDI2.0 machine running Netscape 1.1N, this causes a segmentation
> > >fault and subsequent coredump. GDB reports nothing useable (stripped
> > >executable)
> >
> >   I cannot reproduce this bug on the following platforms:
> >
> >         Solaris 2.5 beta/Netscape 1.1N
>
> I've reproduced it fine under sol2.4 1.1N.  The page
> I tested from is http://www.aloha.net/~newsham/test.html.
> Simply click on the long test url and core dump.
> (You can view source before clicking to see what you
> are clicking on if you dont trust me :)
>
> > Howard Owen [email protected]   Octel Communications Corporation  1024/DC671C31 =
>

Ive tried this url, it does indeed core dump.

Just had a quick look at the core.  From first impressions, it's a global
overwrite.  Therefore we're not overwriting a flushed stack frame, so a
syslog(3) style exploit is impossible.

Global overwrites can be exploited, but due to the scenario we're looking
at, I'd consider exploit chances to be very low indeed.

Cheers,

Neil
--
Let the Mystery Be, So Watcha Want, Longing In Their Hearts, Hate My Way,
M-Bike, Safari, Uncle June and Aunt Kiyoti, Daisy Dead Petals, Tuff Gnarl.

     ...like a badger with an afro throwing sparklers at the Pope...


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