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Date: Thu, 30 Jul 1998 11:27:58 +0200 (CEST)
From: Jan-Philip Velders <jpv@jvelders.tn.tudelft.nl>
To: linux-security@redhat.com
Subject: [linux-security] who (fwd)
Hi *,
fwd from bugtraq
Greetings,
Jan-Philip Velders
<gvelders@jvelders.tn.tudelft.nl>
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---------- Forwarded message ----------
Date: Tue, 28 Jul 1998 20:27:21 +0200
From: Paul Boehm <paul@BOEHM.ORG>
To: BUGTRAQ@NETSPACE.ORG
Subject: who
Hi,
the 'who' program is on some systems in a privileged group
which is allowed to read utmp. On redhat linux 5.1 you can
easily crash who by many different ways (e.g. try who /bin/bash)
on freebsd you can use it to view parts of the content of files that
privileged group may read(try who /privileged/group/file).
this is no big deal with security, but gaining a more privileged group
sometimes may be the key to root compromise.
bye,
pb
--
[ Paul S. Boehm | paul@boehm.priv.at | http://paul.boehm.org/ | infected@irc ]
Money is what gives a programmer his resources. It's an exchange system created
by human beings. It surrounds us. Works for us, binds the economy together.
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