From owner-freebsd-security Mon May 14 11: 9:22 2001 Delivered-To: freebsd-security@freebsd.org Received: from daedalus.cs.brandeis.edu (daedalus.cs.brandeis.edu [129.64.3.179]) by hub.freebsd.org (Postfix) with ESMTP id 41F9E37B423 for ; Mon, 14 May 2001 11:09:18 -0700 (PDT) (envelope-from meshko@daedalus.cs.brandeis.edu) Received: from localhost (meshko@localhost) by daedalus.cs.brandeis.edu (8.9.3/8.9.3) with ESMTP id OAA30982; Mon, 14 May 2001 14:09:02 -0400 Date: Mon, 14 May 2001 14:09:02 -0400 (EDT) From: Mikhail Kruk To: Rob Simmons Cc: Eric Anderson , "Oulman, Jamie" , Subject: Re: nfs mounts / su / yp In-Reply-To: Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-freebsd-security@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.org Well, you can disable booting from floppy, setup BIOS password and physically lock the case. We have a bunch of Linux boxes running NIS in our lab with this kind of setup and I believe there was no problems. It's rather hard to break in the locked computer case without people noticing it. On Mon, 14 May 2001, Rob Simmons wrote: > -----BEGIN PGP SIGNED MESSAGE----- > Hash: RIPEMD160 > > You could set the console to insecure in /etc/ttys. That way single user > mode will ask for the root password. You still can't prevent someone from > booting with their own floppy disk and making changes that way. I think > the only way to prevent that is to use an encrypted filesystem of some > sort. > > Robert Simmons > Systems Administrator > http://www.wlcg.com/ > > On Mon, 14 May 2001, Eric Anderson wrote: > > > If a user reboots their machine, goes into single user mode, and changes > > the local root password (and adds their username into the wheel group of > > course), then boots into multiuser mode, they can su to root, then su to > > any NIS user they desire, and do malicious things as that user. su'ing > > from root to any other user never asks for a password, so login.conf > > isn't used (right?).. > -----BEGIN PGP SIGNATURE----- > Version: GnuPG v1.0.5 (FreeBSD) > Comment: For info see http://www.gnupg.org > > iD8DBQE7AB2qv8Bofna59hYRA0ebAKCQ9R1wLoemlWAuEdplqcSMcY12IQCfVH0B > 8SkJHNs8J3aEYZ8dk27La2k= > =Qb9E > -----END PGP SIGNATURE----- > > > > To Unsubscribe: send mail to majordomo@FreeBSD.org > with "unsubscribe freebsd-security" in the body of the message > To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-security" in the body of the message