bugtraq - Re: RFC: virus handling

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Date: Wed, 28 Jan 2004 15:06:22 -0500
From: Dave Aronson <spamtrap.secfocus@....mailme.org>
To: bugtraq@...urityfocus.com
Cc: Thomas Zehetbauer <thomasz@...tmaster.org>
Subject: Re: RFC: virus handling

On Wed January 28 2004 10:45, Thomas Zehetbauer wrote:

 > 3.1.2.) e-mail Alias and Web-Interface
 > Additionally providers should provide e-mail aliases for the IP
 > addresses of their customers (eg. customer at 127.0.0.1 can be
 > reached via 127.0.0.1@...vider.com)

This would vastly simplify dictionary-attack spamming.

 > or a web interface with similiar functionality.

Better, but still might be easily abused by scripting.

 > 3.2.) Disconnect
 > Providers should grant their customers some grace period to clean
 > their infection and should thereafter be disconnected entirely or
 > filtered based on protocol (eg. outgoing SMTP) or content (eg.
 > transparent smarthost with virus scanner) until they testify that
 > they have cleaned their system.

Grace, shmace!  Viri can do their dirty work in a matter of seconds.  
How about the ISP *immediately* blocks just the port(s) in question?  
(Recognizing that that could be *all* ports.)  It could unblock after 
some time period with no outbound virus infection (or phone home for 
orders, etc.) attempts, and of course reblock when any new such 
activity is detected.

-- 
Dave Aronson, Senior Software Engineer, Secure Software Inc.
(Opinions above NOT those of securesw.com unless so stated!)
Email me at: work (D0T) 2004 (@T) dja (D0T) mailme (D0T) org
Web: http://destined.to/program http://listen.to/davearonson