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Message-ID: <20050730195629.69981.qmail@web54406.mail.yahoo.com>
Date: Sat, 30 Jul 2005 12:56:29 -0700 (PDT)
From: Cesar <cesarc56@...oo.com>
To: sylvain.roger@...ucom.fr, bugtraq@...urityfocus.com
Subject: Re: Re : [Firefox Bug 302187] New: Shared section vulnerability when opening microsoft office document resulting in DoS



It's a security issue, i found it and reported this to
MS long time ago when i started to research shared
sections bugs, MS will fix the issue in some future. I
don't know why MS said to you that it's not a security
issue.


Cesar.

--- sylvain.roger@...ucom.fr wrote:

> As I got some questions about this I think I need to
> precise it.
> I can say for sure now : It is not a firefox
> vulnerability but Microsoft Office vulnerability.
> Firefox is just here as an example.
> The vulnerability is that when a winword.exe process
> is created from another application (like
> firefox.exe) it creates a shared section called
> \BaseNameObjects\Mso97SharedDgXXXXXXXX which has
> write rights for everyone. This allows to write
> arbitrary data on the shared section resulting in a
> denial of service of all opened Microsoft Office
> applications. It may be necessary sometimes to
> reboot the machine in order to use again the Office
> applications.
> Microsoft just answers it is a technical issue and
> not a security issue 
> 


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