Re: ***ULTRALAME*** Microsoft Excel Unicode Overflow ***ULTRALAME***

[str0ke <str0ke () milw0rm com>]

Must be the advisory......... (:

/str0ke

On 6/21/06, ad () heapoverflow com <ad () heapoverflow com> wrote:
> me I wonder who's ultralame, kcope or the advisory ? :>
>
>
> kcope wrote:
> > Hello FistFuXXer,
> > Very nice that you found that, since unicode overflows are not that
> > easy to exploit.
> > I didn't know that Spreadsheet-Perl converted the string into unicode
> > and then put it
> > into the file.
> > Very nice very nice :o) I like that 0x41414141 :o) weird I didn't even
> > look into the
> > hex edit of the xls file.
> >
> > Best Regards,
> >
> > kcope
> >
> >
> >
> > FistFuXXer wrote:
> >> -----BEGIN PGP SIGNED MESSAGE-----
> >> Hash: SHA1
> >>
> >> Hello kcope,
> >>
> >> the vulnerability that you've found isn't an Unicode-based buffer
> >> overflow, Spreadsheet-Perl just converts the string to Unicode and you
> >> can edit it later with a hex editor.
> >>
> >> It's just a simple stack overflow that overwrites the memory after the
> >> return address. Until all the write-able stack memory is full and the
> >> application tries to overwrite the read-only memory after it, an
> >> exception happens. So you won't be able to exploit it by using the
> >> return address of the vulnerable 'hlink' function but you can still use
> >> the SE handler for exploitation.
> >>
> >> It looks like Microsoft should release security patches ASAP.
> >>
> >>
> >> Sincerely yours,
> >> Manuel Santamarina Suarez
> >>
> >
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>
>
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_______________________________________________
Full-Disclosure - We believe in it.
Charter: http://lists.grok.org.uk/full-disclosure-charter.html
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