Re: [Exim] Generic VBS script detection

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Author: Jeffrey Goldberg
Date:  
To: Vadim Vygonets
CC: Exim
Subject: Re: [Exim] Generic VBS script detection
On May 4, 2000 Vadim Vygonets <vadik@???> wrote:

> It's better to filter by matching the Content-Type:
> header-thingie, methinks.


'Fraid not. The content-type of these things is application/octet-stream

The whole thing relies on the fact that some clients when receiving
attachments pay more attention to the file name than they do to the
content-type. So users have grown accustomed to "executing" attachments
that are presented to them as

application/octet-stream
Name "File.txt"

This is the bit of psychology that this worm relies on. Now if people use
mailers which respect content-type properly and/or which display the full
file names if the system will rely on that for what to do, then we
wouldn't have this problem at this scale.

-j


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Jeffrey Goldberg                +44 (0)1234 750 111 x 2826
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Relativism is the triumph of authority over truth, convention over justice.