From owner-freebsd-security@FreeBSD.ORG  Tue Mar 15 10:35:11 2011
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From: =?utf-8?Q?Dag-Erling_Sm=C3=B8rgrav?= <des@des.no>
To: RW <rwmaillists@googlemail.com>
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Date: Tue, 15 Mar 2011 11:35:06 +0100
In-Reply-To: <20110313220552.5b79de13@gumby.homeunix.com> (RW's message of
	"Sun, 13 Mar 2011 22:05:52 +0000")
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Cc: freebsd-security@freebsd.org
Subject: Re: It's not possible to allow non-OPIE logins only from trusted
	networks
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RW <rwmaillists@googlemail.com> writes:
> IIRC there is/was a weakness in FreeBSD's OPIE implementation in that
> it's susceptible to rainbow table attacks - I think part of the hash
> is discarded.

Can you provide more details?

AFAIK, OPIE was written to be 100% compatible with S/Key, so any
weakness in OPIE is a design flaw in S/Key which cannot be corrected.

DES
--=20
Dag-Erling Sm=C3=B8rgrav - des@des.no