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Date:      Mon, 1 Nov 1999 12:48:15 -0500 (EST)
From:      Spidey <beaupran@jsp.umontreal.ca>
To:        Eivind Eklund <eivind@FreeBSD.ORG>
Cc:        freebsd-security@FreeBSD.ORG
Subject:   Re: Examining FBSD set[ug]ids and their use
Message-ID:  <14365.53855.175577.614259@anarcat.dyndns.org>
References:  <14364.64172.638014.558487@anarcat.dyndns.org> <19991101173955.L72085@bitbox.follo.net> <14365.50723.872972.30971@anarcat.dyndns.org> <19991101184031.O72085@bitbox.follo.net>

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--- Big Brother told Eivind Eklund to write, at 18:40 of November 1:
> On Mon, Nov 01, 1999 at 11:56:03AM -0500, Spidey wrote:
> > --- Big Brother told Eivind Eklund to write, at 17:39 of November 1:
> > > On Sun, Oct 31, 1999 at 09:27:56PM -0500, Spidey wrote:
> > > > # The suid bit is NOT necessary for any usage I could find...
> > > > 	df gname=operator mode=2555
> > > 
> > > The suid bit is necessary for users to be able to inspect the amount
> > > of disk space free on unmounted disks.
> > 
> > I must be missing something here. When a disk is unmounted, it does
> > not appear in the df output, no?
> 
> No, but a user can explictly run df against an unmounted file system.
> (Not after I get my dirty fingers out of -current, though).

Ah. I never witness this behavior. I'll try it.. :)
 
> > > > # High scores management
> > > > 			sol uname=games gname=games mode=6755
> > > 
> > > This looks like a bug in some port, actually.  We shouldn't normally
> > > have anything that is setuid games, only setgid.
> > 
> > Oh. And why?
> 
> Because somebody getting an extra group makes less harm than them
> getting an extra UID - an extra GID lets them get extra access, while
> an alternative UID give them extra access *and* lets them hide who
> they are.

That is a fact. Then there's a hell of a cleaning up to do in the game 
ports!! It seems quite a lot of them install with suid games
privileges...

Should I send this list to -ports?

AnarCat

-- 
Si l'image donne l'illusion de savoir
C'est que l'adage pretend que pour croire,
L'important ne serait que de voir

Lofofora


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