From owner-freebsd-security  Mon Jul 28 15:26:30 1997
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Date: Mon, 28 Jul 1997 15:26:12 -0700 (PDT)
From: Vincent Poy <vince@mail.MCESTATE.COM>
To: Robert Watson <robert+freebsd@cyrus.watson.org>
cc: Adam Shostack <adam@homeport.org>, security@FreeBSD.ORG,
        JbHunt <johnnyu@accessus.net>, "[Mario1-]" <mario1@PrimeNet.Com>
Subject: Re: security hole in FreeBSD
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On Mon, 28 Jul 1997, Robert Watson wrote:

=)Several mail delivery programs (mail.local, sendmail, uucp-stuff, etc)
=)require root access to delivery to local mailboxes; crontab related stuff,
=)terminal locking, some kerberos commands, local XWindows servers, and su
=)all rely on suid.

	That's what I thought.  I think even fingerd needs suid.

=)What type of secured environment are you hoping to create?  If root access
=)is only to be used from the console, and shared functions like
=)xwindows/mailstuff/user crontab aren't needed, you can probably just
=)disable all the suid-root programs, or suid-anything programs.  Look also
=)at the sgid programs that scan kmem.  Ideally, you'd also put the system
=)in a higher secure level, and mount all partitions non-suid, as long as
=)login kept working :).

	Hmmm, but what about root access by using su?

=)Does login require suid, or does gettytab run it as root anyway?

	I think it does.


Cheers,
Vince - vince@MCESTATE.COM - vince@GAIANET.NET           ________   __ ____ 
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