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Date:      Mon, 28 May 2001 09:41:35 +0100
From:      Mike Meredith <hmv@meredithm.fsnet.co.uk>
To:        questions@FreeBSD.ORG
Subject:   Re: security question
Message-ID:  <0105280941350A.00298@warlock.hmv.net>
In-Reply-To: <bulk.95613.20010527183351@hub.freebsd.org>
References:  <bulk.95613.20010527183351@hub.freebsd.org>

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> Basically, I set up three temporary machines (or set up a temp login
> on one machine) We assume that I've cracked machine "A" and you then
> log in to machine "B" via telnet from machine "C". I then show you
> that I've sniffed your password and can now log into machine "B". To
> increase the shock value, I can have you su to root via telnet, which
> then gives me root access to machine "B".
> (p.s. don't try this particular demo if you're running a switch
> because it won't work.)

I might be repeating the obvious here, but a switched environment 
doesn't protect totally against sniffing. It just makes it slightly 
more difficult. Look for a utility called 'dsniff', and there are other 
tools to do the same job.

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