From owner-freebsd-security Thu Dec 21 20:19:49 2000 From owner-freebsd-security@FreeBSD.ORG Thu Dec 21 20:19:47 2000 Return-Path: Delivered-To: freebsd-security@freebsd.org Received: from citusc.usc.edu (citusc.usc.edu [128.125.38.123]) by hub.freebsd.org (Postfix) with ESMTP id 20FE037B400; Thu, 21 Dec 2000 20:19:47 -0800 (PST) Received: (from kris@localhost) by citusc.usc.edu (8.9.3/8.9.3) id UAA32425; Thu, 21 Dec 2000 20:21:01 -0800 Date: Thu, 21 Dec 2000 20:21:01 -0800 From: Kris Kennaway To: Dag-Erling Smorgrav Cc: Kris Kennaway , Mikhail Kruk , "Michael A. Williams" , security@FreeBSD.ORG Subject: Re: Read-Only Filesystems Message-ID: <20001221202101.A32404@citusc.usc.edu> References: <20001221064842.B27118@citusc.usc.edu> <20001221084452.A28157@citusc.usc.edu> Mime-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-md5; protocol="application/pgp-signature"; boundary="IS0zKkzwUGydFO0o" Content-Disposition: inline User-Agent: Mutt/1.2i In-Reply-To: ; from des@ofug.org on Thu, Dec 21, 2000 at 07:57:55PM +0100 Sender: kris@citusc.usc.edu Sender: owner-freebsd-security@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.org --IS0zKkzwUGydFO0o Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Thu, Dec 21, 2000 at 07:57:55PM +0100, Dag-Erling Smorgrav wrote: > Kris Kennaway writes: > > On Thu, Dec 21, 2000 at 11:39:56AM -0500, Mikhail Kruk wrote: > > > Kris Kennaway writes: > > > > Correct, but if they're not noschg then you can trivially trojan a > > > > kernel module which you know is loaded at boot time. [...] > > > wait, but can't you make kernel modules and startup scripts noschg to= o? > > Go back and read the first paragraph above. It's theoretically > > possible, but the list of things you would have to noschg is huge, > > constantly changing from version to version, and not completely known. >=20 > Umm, people, please, "schg" not "noschg". If you find this confusing, Sorry, I always get those two confused because the abbreviation doesnt mean anything to me - I didnt have a FreeBD box handy to check the manpage on. Kris --IS0zKkzwUGydFO0o Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.0.4 (GNU/Linux) Comment: For info see http://www.gnupg.org iD8DBQE6QtatWry0BWjoQKURAoarAJwJD8jI4zpHaq1tCKzipqM228tS5ACgsm8m hFWeUsSRSXEuRhyUOpLmpT4= =B22z -----END PGP SIGNATURE----- --IS0zKkzwUGydFO0o-- To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-security" in the body of the message