From owner-freebsd-current Sun Oct 6 07:52:09 1996 Return-Path: owner-current Received: (from root@localhost) by freefall.freebsd.org (8.7.5/8.7.3) id HAA22665 for current-outgoing; Sun, 6 Oct 1996 07:52:09 -0700 (PDT) Received: from irz301.inf.tu-dresden.de (irz301.inf.tu-dresden.de [141.76.1.11]) by freefall.freebsd.org (8.7.5/8.7.3) with SMTP id HAA22657 for ; Sun, 6 Oct 1996 07:52:05 -0700 (PDT) Received: from sax.sax.de (sax.sax.de [193.175.26.33]) by irz301.inf.tu-dresden.de (8.6.12/8.6.12-s1) with ESMTP id QAA16246 for ; Sun, 6 Oct 1996 16:52:03 +0200 Received: (from uucp@localhost) by sax.sax.de (8.6.12/8.6.12-s1) with UUCP id QAA13924 for freebsd-current@FreeBSD.org; Sun, 6 Oct 1996 16:52:02 +0200 Received: (from j@localhost) by uriah.heep.sax.de (8.7.5/8.6.9) id QAA08151 for freebsd-current@FreeBSD.org; Sun, 6 Oct 1996 16:20:36 +0200 (MET DST) From: J Wunsch Message-Id: <199610061420.QAA08151@uriah.heep.sax.de> Subject: Re: secure level diffs to kern_mib.c, LINT To: freebsd-current@FreeBSD.org (FreeBSD-current users) Date: Sun, 6 Oct 1996 16:20:36 +0200 (MET DST) Reply-To: joerg_wunsch@uriah.heep.sax.de (Joerg Wunsch) In-Reply-To: <199610061132.VAA25153@godzilla.zeta.org.au> from Bruce Evans at "Oct 6, 96 09:32:19 pm" X-Phone: +49-351-2012 669 X-PGP-Fingerprint: DC 47 E6 E4 FF A6 E9 8F 93 21 E0 7D F9 12 D6 4E X-Mailer: ELM [version 2.4ME+ PL17 (25)] MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: owner-current@FreeBSD.org X-Loop: FreeBSD.org Precedence: bulk As Bruce Evans wrote: > Actually, securelevel 1 is normally so insecure that it shouldn't be used. > It essentially only provides write protection of /dev/mem and /dev/kmem. > The write protection on mounted disks is worthless becauses there are > lots of aliases. Even plain BSD has a whole disk partition, and FreeBSD > has lots of slices and SCSI control devices. The SCSI control devices should deny their service if securelevel is ``secure enough''. -- cheers, J"org joerg_wunsch@uriah.heep.sax.de -- http://www.sax.de/~joerg/ -- NIC: JW11-RIPE Never trust an operating system you don't have sources for. ;-)