From owner-freebsd-security@FreeBSD.ORG Mon Dec 5 20:34:25 2011 Return-Path: <owner-freebsd-security@FreeBSD.ORG> Delivered-To: freebsd-security@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 03BAF106566B for <freebsd-security@freebsd.org>; Mon, 5 Dec 2011 20:34:25 +0000 (UTC) (envelope-from mike@sentex.net) Received: from smarthost1.sentex.ca (smarthost1-6.sentex.ca [IPv6:2607:f3e0:0:1::12]) by mx1.freebsd.org (Postfix) with ESMTP id B94718FC1E for <freebsd-security@freebsd.org>; Mon, 5 Dec 2011 20:34:24 +0000 (UTC) Received: from [IPv6:2607:f3e0:0:4:f025:8813:7603:7e4a] (saphire3.sentex.ca [IPv6:2607:f3e0:0:4:f025:8813:7603:7e4a]) by smarthost1.sentex.ca (8.14.5/8.14.4) with ESMTP id pB5KYHNF069678; Mon, 5 Dec 2011 15:34:17 -0500 (EST) (envelope-from mike@sentex.net) Message-ID: <4EDD2AC5.9070505@sentex.net> Date: Mon, 05 Dec 2011 15:34:13 -0500 From: Mike Tancsa <mike@sentex.net> Organization: Sentex Communications User-Agent: Mozilla/5.0 (Windows; U; Windows NT 6.1; en-US; rv:1.9.2.13) Gecko/20101207 Thunderbird/3.1.7 MIME-Version: 1.0 To: d@delphij.net References: <4ED68B4D.4020004@sentex.net> <4ED69B7E.50505@frasunek.com> <4ED6C3C6.5030402@delphij.net> <4ED6D1CD.9080700@sentex.net> <4ED6D577.9010007@delphij.net> <4EDD1F2F.20802@sentex.net> <4EDD2027.9030807@delphij.net> In-Reply-To: <4EDD2027.9030807@delphij.net> X-Enigmail-Version: 1.1.1 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit X-Scanned-By: MIMEDefang 2.71 on IPv6:2607:f3e0:0:1::12 Cc: "freebsd-security@freebsd.org" <freebsd-security@freebsd.org>, Xin Li <delphij@delphij.net>, Przemyslaw Frasunek <przemyslaw@frasunek.com> Subject: Re: ftpd security issue ? X-BeenThere: freebsd-security@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: "Security issues \[members-only posting\]" <freebsd-security.freebsd.org> List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-security>, <mailto:freebsd-security-request@freebsd.org?subject=unsubscribe> List-Archive: <http://lists.freebsd.org/pipermail/freebsd-security> List-Post: <mailto:freebsd-security@freebsd.org> List-Help: <mailto:freebsd-security-request@freebsd.org?subject=help> List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-security>, <mailto:freebsd-security-request@freebsd.org?subject=subscribe> X-List-Received-Date: Mon, 05 Dec 2011 20:34:25 -0000 On 12/5/2011 2:48 PM, Xin Li wrote: > > Currently no (I thought you were in the cc list in my discussion with > kib@?). My initial plan was simply rejecting .so's with wrong > permissions but in the discussion turns out that would not be > sufficient and we have also considered other ways to do it, e.g. have > a wrapper where one can disable them completely. I have not a full > solution yet as the change would touch quite a lot of things in the > base system... Hi Xin, yes, I am on the cc list. I vaguely understand the complexity of the issue enough to see its not an easy fix. In the mean time, I was just looking for ways to protect the few boxes I have that run proftpd. Right now running with "rootrevoke on" seems to be the safest, but that has the side effect of killing active connections. ---Mike -- ------------------- Mike Tancsa, tel +1 519 651 3400 Sentex Communications, mike@sentex.net Providing Internet services since 1994 www.sentex.net Cambridge, Ontario Canada http://www.tancsa.com/