From owner-freebsd-current@freebsd.org  Thu Aug 11 09:30:42 2016
Return-Path: <owner-freebsd-current@freebsd.org>
Delivered-To: freebsd-current@mailman.ysv.freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org
 [IPv6:2001:1900:2254:206a::19:1])
 by mailman.ysv.freebsd.org (Postfix) with ESMTP id AA2FBBB6FB3
 for <freebsd-current@mailman.ysv.freebsd.org>;
 Thu, 11 Aug 2016 09:30:42 +0000 (UTC) (envelope-from crest@rlwinm.de)
Received: from smtp.rlwinm.de (smtp.rlwinm.de [IPv6:2a01:4f8:201:31ef::e])
 (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits))
 (Client did not present a certificate)
 by mx1.freebsd.org (Postfix) with ESMTPS id 5D99C1188
 for <freebsd-current@freebsd.org>; Thu, 11 Aug 2016 09:30:41 +0000 (UTC)
 (envelope-from crest@rlwinm.de)
Received: from vader9.bultmann.eu (unknown [87.253.189.132])
 (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits))
 (No client certificate requested)
 by smtp.rlwinm.de (Postfix) with ESMTPSA id C4DD02D8B
 for <freebsd-current@freebsd.org>; Thu, 11 Aug 2016 11:30:38 +0200 (CEST)
Subject: Re: Passwordless accounts vi ports!
To: freebsd-current@freebsd.org
References: <20160811070505.2c1a1466@freyja.zeit4.iv.bundesimmobilien.de>
From: Jan Bramkamp <crest@rlwinm.de>
Message-ID: <84687796-5113-152c-cf34-9f8e891c3ea2@rlwinm.de>
Date: Thu, 11 Aug 2016 11:30:37 +0200
User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.11; rv:45.0)
 Gecko/20100101 Thunderbird/45.2.0
MIME-Version: 1.0
In-Reply-To: <20160811070505.2c1a1466@freyja.zeit4.iv.bundesimmobilien.de>
Content-Type: text/plain; charset=windows-1252; format=flowed
Content-Transfer-Encoding: 7bit
X-BeenThere: freebsd-current@freebsd.org
X-Mailman-Version: 2.1.22
Precedence: list
List-Id: Discussions about the use of FreeBSD-current
 <freebsd-current.freebsd.org>
List-Unsubscribe: <https://lists.freebsd.org/mailman/options/freebsd-current>, 
 <mailto:freebsd-current-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-current/>
List-Post: <mailto:freebsd-current@freebsd.org>
List-Help: <mailto:freebsd-current-request@freebsd.org?subject=help>
List-Subscribe: <https://lists.freebsd.org/mailman/listinfo/freebsd-current>, 
 <mailto:freebsd-current-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Thu, 11 Aug 2016 09:30:42 -0000

On 11/08/16 07:05, O. Hartmann wrote:
> I just checked the security scanning outputs of FreeBSD and found this
> surprising result:
>
> [...]
> Checking for passwordless accounts:
> polkitd::565:565::0:0:Polkit Daemon User:/var/empty:/usr/sbin/nologin
> pulse::563:563::0:0:PulseAudio System User:/nonexistent:/usr/sbin/nologin
> saned::194:194::0:0:SANE Scanner Daemon:/nonexistent:/bin/sh
> clamav::106:106::0:0:Clamav Antivirus:/nonexistent:/usr/sbin/nologin
> bacula::910:910::0:0:Bacula Daemon:/var/db/bacula:/usr/sbin/nologin
> [...]
>
> Obviously, some ports install accounts but do not secure them as there is an
> empty password.

Are you certain that the ports didn't use "*" as crypted hash which 
isn't a valid hash for any supported algorithm and prevents password 
based authentication for the account?

FreeBSD also uses two passwd files (and compiles them into databases for 
fast lookups). The old /etc/passwd is world readable but contains no 
passwords and the real /etc/master.passwd which is only accessible by 
root. If you run `getent passwd`  the missing password field is replaced 
with "*" which can confuse buggy scripts.