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Date:      Fri, 5 Jul 2002 10:01:45 -0400 (EDT)
From:      Trevor Johnson <trevor@jpj.net>
To:        Dag-Erling Smorgrav <des@ofug.org>
Cc:        Mike Tancsa <mike@sentex.net>, Ruslan Ermilov <ru@FreeBSD.ORG>, <security@FreeBSD.ORG>
Subject:   Re: Default ssh protocol in -STABLE [was: HEADS UP: FreeBSD-STABLE now has OpenSSH 3.4p1]
Message-ID:  <20020705094314.C73784-100000@blues.jpj.net>
In-Reply-To: <xzphejepfd7.fsf_-_@flood.ping.uio.no>

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> > As a lot has changed with OpenSSH in FreeBSD, perhaps now is a good
> > time to make the 2,1 the default instead ?
>
> I'd like that.  I think the only reason for the old default was not to
> surprise users who had the ssh1 RSA host key in their known_hosts but
> not the ssh2 DSA host key.
>
> What do people think about this?  Keep 2,1 or revert to 1,2?

Use of protocol version 1 makes an insertion attack possible, according to
<URL:http://www.openssh.com/security.html>.  The vulnerability was
published by CORE SDI in June of 1998.  I would like to see protocol
version 1 disabled by default, with a note in UPDATING about the change.
-- 
Trevor Johnson


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