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NFS: security problem with root_squash ??

daemon@ATHENA.MIT.EDU (Karl Keyte)
Tue Jan 31 04:00:13 1995

Date: Mon, 30 Jan 1995 23:06:10 +0100 (MET)
From: Karl Keyte <kkeyte@koft.rhein-main.de>
Reply-To: kkeyte@esoc.bitnet, kkeyte@koft.rhein-main.de
To: linux-net@vger.rutgers.edu, linux-kernel@vger.rutgers.edu


I have just noticed a problem with NFS mounts.  Perhaps it's me!
If I export a filesystem in /etc/exports with something like:

/home   someone(rw,insecure,root_squash)

I understood that this should block the root user at host 'someone'
from having root access inside /home when mounted.  It doesn't!
It lets that user do anything in that filesystem.

Have I got something wrong, or has something changed badly?

I'm running 1.1.87, standard tools, networking is either on
ethernet or SLIP - tried them both!

Karl

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