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List:       fedora-devel-list
Subject:    Re: utmp and friends
From:       Miroslav Lichvar <mlichvar () redhat ! com>
Date:       2007-06-28 9:25:48
Message-ID: 20070628092548.GD21279 () localhost
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On Wed, Jun 27, 2007 at 08:25:24AM -0400, Bill Nottingham wrote:
> Miroslav Lichvar (mlichvar@redhat.com) said: 
> > > The entire idea of utempter is so that the terminal *doesn't* need to be
> > > setgid - if it's setgid, what's the point of a helper?
> > 
> > Well, the terminal doesn't need to be setgid utmp, but only utempter.
> > Setgid utempter allows only adding/removing entries in utmp while
> > setgid utmp allows unrestricted access.
> 
> Only if it's coded wrong (doesn't drop privs, etc.). By adding a
> setgid to the binary, you're making the point of separating it
> merely a code-sharing issue, as opposed to any huge security gains.
> 
> I'd remove the block on the directory - basically, you're intentionally
> breaking user's environments for illusory security.

Ok, I've filed a bug report to drop the requirement in libutempter (#246063).

-- 
Miroslav Lichvar

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