From owner-freebsd-security@FreeBSD.ORG Mon Dec 22 19:14:36 2014 Return-Path: Delivered-To: freebsd-security@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTPS id 8673D407; Mon, 22 Dec 2014 19:14:36 +0000 (UTC) Received: from phk.freebsd.dk (phk.freebsd.dk [130.225.244.222]) by mx1.freebsd.org (Postfix) with ESMTP id 454C91D55; Mon, 22 Dec 2014 19:14:36 +0000 (UTC) Received: from critter.freebsd.dk (unknown [192.168.60.3]) by phk.freebsd.dk (Postfix) with ESMTP id 568903B9D8; Mon, 22 Dec 2014 19:14:35 +0000 (UTC) Received: from critter.freebsd.dk (localhost [127.0.0.1]) by critter.freebsd.dk (8.14.9/8.14.9) with ESMTP id sBMJEYT2022954; Mon, 22 Dec 2014 19:14:35 GMT (envelope-from phk@phk.freebsd.dk) To: jungle Boogie Subject: Re: ntpd vulnerabilities In-reply-to: From: "Poul-Henning Kamp" References: <252350272.1812596.1419241828431.JavaMail.zimbra@cleverbridge.com> <201412221745.KAA28186@mail.lariat.net> <1419274938.916478.205831685.0E7433EA@webmail.messagingengine.com> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-ID: <22952.1419275674.1@critter.freebsd.dk> Content-Transfer-Encoding: quoted-printable Date: Mon, 22 Dec 2014 19:14:34 +0000 Message-ID: <22953.1419275674@critter.freebsd.dk> Cc: freebsd-security@freebsd.org X-BeenThere: freebsd-security@freebsd.org X-Mailman-Version: 2.1.18-1 Precedence: list List-Id: "Security issues \[members-only posting\]" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 22 Dec 2014 19:14:36 -0000 -------- In message , jungle Boogie writes: >Would you say a MITM attack is similar to a forged ntp reply? > >If so, have you seen this: >http://quigon.bsws.de/papers/opencon04/ntpd/mgp00018.html While that does make it harder to spoof NTP packets "blind", it does *nothing* for MITM resistance. -- = Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 phk@FreeBSD.ORG | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe = Never attribute to malice what can adequately be explained by incompetence= .