RE: TXT or HTML? -- IE NEW BUG

[arivanov () sigsegv cx]

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Hi,

        I may be terribly mistaken, but I think that this to some extent has
been discussed previously on Bugtraq. I cannot get through to the securityfocus
web site all morning so pls excuse me for not quoting the exact post where this
was mentioned the first time.

        Quoting from memory, so excuse me for any discrepancies with the
original post (it was more than 6 months ago): IE ignores not just the
extension. If I recall correctly mime types supplied by a server are happily
ignored as well.

        What happens is IE looks at the first 200 bytes or so and desides based
on "magic" first, looks the mime type/extension later. So it is not just HTML.

On 27-Jul-2001 cr4zybird wrote:
> TXT or HTML? -- IE NEW BUG
> vulnerable programs:
> IE4 ,IE5 ,IE5,IE6 ,Microsoft Word ,Microsoft 
> Excel,Microsoft PowerPoint, 
> Tencent explorer (I've tested all the versions of IE that 
> i can find, they 
> are all vulnerable)
>
> description:
> IE doesn't recognize the extensions of files, which 
> may contain some html 
> code.
> Write a HTML file on NOTEPAD. save it as *.txt. 
> upload to any server.then 
> use IE to visit this page.Found: IE excuted the HTML 
> code which contained in 

[snip]

Brgds,

- ----------------------------------
Anton R. Ivanov
ARI2-RIPE
Today's deliverables will have to be delayed because:

Borg implants are failing

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