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Date:      Sat, 19 Jul 1997 12:27:46 +0200
From:      sthaug@nethelp.no
To:        andreas@klemm.gtn.com
Cc:        hackers@FreeBSD.ORG
Subject:   Re: sendmail complains about being unable to write his pid file
Message-ID:  <15406.869308066@verdi.nethelp.no>
In-Reply-To: Your message of "Sat, 19 Jul 1997 12:08:26 %2B0200"
References:  <19970719120826.19772@gtn.com>

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> > I'm always nervous about directories owned by bin, on the assumption
> > that bin might be easier to break than root, and could then be used
> > as a stepstone to breaking root.
> 
> I don't believe this, because bin isn't a password protected login.
> Look here:
> bin:*:3:7:Binaries Commands and Source,,,:/:/nonexistent

That's fine - until somebody decides to run NFS. Then all bets are off.

> I think it's a BSDism. bin is the UID and GID for Binaries, Commands
> and source as shown by the entry in /etc/passwd ...

Yes, but the question stands - why is it setup this way? What is gained
by having binaries (and important directories) owned by bin instead of
root?

Steinar Haug, Nethelp consulting, sthaug@nethelp.no



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