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 (at) solucom (dot) fr [email concealed] 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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