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Date:      Wed, 23 Jan 2002 10:06:59 -0600
From:      Dan Nelson <dnelson@allantgroup.com>
To:        "Crist J . Clark" <cjc@FreeBSD.ORG>
Cc:        parv <parv_@yahoo.com>, Cliff Sarginson <cliff@raggedclown.net>, f-q <freebsd-questions@FreeBSD.ORG>
Subject:   Re: is /usr/bin/passwd advisable as a login shell for ftp only users?
Message-ID:  <20020123160659.GM44873@dan.emsphone.com>
In-Reply-To: <20020123040114.H83184@blossom.cjclark.org>
References:  <20020123035805.GA92721@moo.holy.cow> <20020123041706.GH1345@raggedclown.net> <20020123061342.GA92756@moo.holy.cow> <20020123040114.H83184@blossom.cjclark.org>

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In the last episode (Jan 23), Crist J . Clark said:
> On Wed, Jan 23, 2002 at 01:13:42AM -0500, parv wrote:
> 
> [snip]
> 
> > i didn't think of the "suid" bit, but was well aware that passwd has
> > access to the passwd database.
> 
> Actually, that's not the big security risk. The primary risk is that
> you give the world pretty much open access to try to brute force the
> password with a dictionary attack and no alarms will go off.

Well, no. :)   You have to log in with the correct password before the
system will launch $SHELL, and a non-root user can only change their
own password (which they just entered in order to log in).

-- 
	Dan Nelson
	dnelson@allantgroup.com

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