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Date:      Tue, 21 Aug 2001 12:00:32 +0800
From:      Eugene Grosbein <eugen@svzserv.kemerovo.su>
To:        Tom <tom@uniserve.com>
Cc:        stable@FreeBSD.ORG
Subject:   Re: stale entries in utmp (security issue?)
Message-ID:  <3B81DCE0.FA04FA74@svzserv.kemerovo.su>
References:  <Pine.BSF.4.10.10108202039170.62960-100000@athena.uniserve.ca>

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> > 4. Now you are root but command 'w' does not say so (security?)
> > 5. type 'logout'
> > 6. Now command 'w' says user 'username' is still logged but it has no
> > processes.
> 
>   Since the root user can just delete the utmp file, there is not too much
> to be done about this.  Some UNIX systems have gone to a utmp API and an
> utmp server to maintain the logged in user state better.

How can root fix utmp safely without touching other working users?

Eugene Grosbein

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