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Date:      Sat, 8 Sep 2001 19:10:13 -0700
From:      Kris Kennaway <kris@obsecurity.org>
To:        "Andrey A. Chernov" <ache@nagual.pp.ru>
Cc:        Kris Kennaway <kris@obsecurity.org>, "Todd C. Miller" <Todd.Miller@courtesan.com>, Matt Dillon <dillon@earth.backplane.com>, Jordan Hubbard <jkh@FreeBSD.ORG>, security@FreeBSD.ORG, audit@FreeBSD.ORG
Subject:   Re: Fwd: Multiple vendor 'Taylor UUCP' problems.
Message-ID:  <20010908191013.B5881@xor.obsecurity.org>
In-Reply-To: <20010909060144.B34519@nagual.pp.ru>; from ache@nagual.pp.ru on Sun, Sep 09, 2001 at 06:01:44AM %2B0400
References:  <200109082103.f88L3fK29117@earth.backplane.com> <20010908154617.A73143@xor.obsecurity.org> <20010908170257.A82082@xor.obsecurity.org> <20010908174304.A88816@xor.obsecurity.org> <20010909045226.A33654@nagual.pp.ru> <20010908180848.A94567@xor.obsecurity.org> <200109090120.f891KvM14677@xerxes.courtesan.com> <20010909054457.A34319@nagual.pp.ru> <20010908185602.B5619@xor.obsecurity.org> <20010909060144.B34519@nagual.pp.ru>

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On Sun, Sep 09, 2001 at 06:01:44AM +0400, Andrey A. Chernov wrote:
> On Sat, Sep 08, 2001 at 18:56:02 -0700, Kris Kennaway wrote:
> >=20
> > That doesn't protect NFS-mounted systems, and doesn't prevent
>=20
> Don't have ideas about NFS. Is schg not works there?

Actually, I think I was overstating a bit.  You can't set UFS file
flags on an NFS volume, but they should work fine if already set on
the server and /usr is mounted by a client.

What will break is trying to do an installworld onto a remote NFS
volume, or installworld within a jail, since in order for that to
succeed you have to tell it not to set file flags, and that will leave
you with a local root exploit on the installed system.

> > arbitrary users from reading/modifying the UUCP spool files.
>=20
> It is bad design of UUCP, it is not our problem. Moreover, it can't be
> fixed easily without total UUCP redesign. See my prev. message explaining
> it more.

Fair enough.

Kris

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