Date: Wed, 4 Oct 2000 02:19:48 -0700 From: Kris Kennaway <kris@FreeBSD.org> To: Alfred Perlstein <bright@wintelcom.net> Cc: Kris Kennaway <kris@FreeBSD.ORG>, Dima Dorfman <dima@unixfreak.org>, Mike Silbersack <silby@silby.com>, security@FreeBSD.ORG Subject: Re: BSD chpass (fwd) Message-ID: <20001004021948.A76230@freefall.freebsd.org> In-Reply-To: <20001004021658.F27736@fw.wintelcom.net>; from bright@wintelcom.net on Wed, Oct 04, 2000 at 02:16:59AM -0700 References: <Pine.BSF.4.21.0010040014430.35500-100000@achilles.silby.com> <20001004053422.8A3901F19@static.unixfreak.org> <20001004021426.A74690@freefall.freebsd.org> <20001004021531.B74690@freefall.freebsd.org> <20001004021658.F27736@fw.wintelcom.net>
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On Wed, Oct 04, 2000 at 02:16:59AM -0700, Alfred Perlstein wrote:
> * Kris Kennaway <kris@FreeBSD.ORG> [001004 02:15] wrote:
> > On Wed, Oct 04, 2000 at 02:14:26AM -0700, Kris Kennaway wrote:
> > > On Tue, Oct 03, 2000 at 10:34:22PM -0700, Dima Dorfman wrote:
> > > > > For those not subscribed to bugtraq, it's time to remove the suid bit on
> > > > > chpass.
> > > >
> > > > Unfortunatly it isn't that easy if you're running with securelevel > 0
> > > > since chpass is installed with the schg (system immutable) flag on by
> > > > default. Oh well, guess it's time to reboot some hosts. :-/
> > >
> > > mv it into a mode 000 directory :-)
> >
> > Oops, can't do that. Reboot :)
>
> Can you mount something over it?
Hmm, now that null mounts work in -current you could, actually - make a
copy of /usr/bin except for chpass in say /usr/bin2 and null mount it
on /usr/bin. Except securelevel disallows mounts, I think :)
Kris
--
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