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Re: File extensions spoofable in MSIE download dialog

daemon@ATHENA.MIT.EDU (chef)
Thu Nov 29 16:04:10 2001

From: "chef" <chef@cube.blinx.de>
To: "'StatiC'" <static@tampabay.rr.com>, <bugtraq@securityfocus.com>
Date: Thu, 29 Nov 2001 19:03:21 +0100
Message-ID: <000001c17900$21868730$a21a73c2@blinx.de>
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  -----Ursprüngliche Nachricht-----
> Von: StatiC [mailto:static@tampabay.rr.com] 
> Gesendet: Donnerstag, 29. November 2001 03:52
> 
> I was playing with apache configs a few months ago and 
> noticed a similar issue with IE5.5.  The procodure below will 
> cause IE5.5 to display the open dialog for readme.txt but 
> once opened, it executes immediately on IE5.5 sp2 with no 
> hint that it is really getting an executable file called 
> calc.exe.  I only tested it with IE5.5.

I testet it right now, with IE6; Q312461 / WinXP and i think
there is no problem at all.

First a question for text.txt pops up and when i say "open"
a second message with question for save / open pops up.
This second popup tells the right name "calc.exe" .
Finally when i say "open" it opens the calculator.

For testing: http://www.geilerserver.de/text.txt

> Why does microsoft think it is wise to trust the filename in 
> the url over what the header content-type is set to for 
> display purposes since the content-type seems to take 
> priority for what will really happen with the file.

I think that's only a Problem of older Versions.

^cUbE^


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