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Date: Thu, 7 Mar 2002 10:23:48 +0100
From: Corinna Vinschen <cygwin AT cygwin DOT com>
To: cygwin AT cygwin DOT com
Subject: Re: login: no shell: /bin/bash: Permission denied
Message-ID: <20020307102348.N13590@cygbert.vinschen.de>
Mail-Followup-To: cygwin AT cygwin DOT com
References: <m3eliylhc2 DOT fsf AT appel DOT lilypond DOT org> <20020306101433 DOT P13590 AT cygbert DOT vinschen DOT de> <3C866A0B DOT 6040500 AT DeFaria DOT com> <20020306213202 DOT C13590 AT cygbert DOT vinschen DOT de> <3C869077 DOT 3090705 AT DeFaria DOT com>
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On Wed, Mar 06, 2002 at 01:56:07PM -0800, Andrew DeFaria wrote:
> OK then, seems to me that su might be implementable by using a service 
> that runs as SYSTEM and takes requests to switch user from user A to 
> user B. Possible?

Sure.  It's exactly the way the user switch is implemented in 2K/XP.

> Regardless, to me it's still would be a large security hole if all one 
> needs to do is:
> 
> $ echo "+" > ~/.rhosts
> 
> to be able to abuse rsh to do something under somebody else's user ID is 
> it not?

It's the same on U*X.  If you don't care for the permissions of
your home directory you're out of luck.

And rsh is a dangerous service anyway.  If you don't want it,
just remove the matching line in /etc/inetd.conf and use ssh.

Corinna

-- 
Corinna Vinschen                  Please, send mails regarding Cygwin to
Cygwin Developer                                mailto:cygwin AT cygwin DOT com
Red Hat, Inc.

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