From owner-svn-src-all@freebsd.org Sun Aug 7 17:43:05 2016 Return-Path: Delivered-To: svn-src-all@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 68C92BB1CF8 for ; Sun, 7 Aug 2016 17:43:05 +0000 (UTC) (envelope-from mailing-machine@vniz.net) Received: from mail-lf0-f44.google.com (mail-lf0-f44.google.com [209.85.215.44]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (Client CN "smtp.gmail.com", Issuer "Google Internet Authority G2" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id E7D0818FC for ; Sun, 7 Aug 2016 17:43:04 +0000 (UTC) (envelope-from mailing-machine@vniz.net) Received: by mail-lf0-f44.google.com with SMTP id b199so233683104lfe.0 for ; Sun, 07 Aug 2016 10:43:04 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:subject:to:references:cc:from:message-id:date :user-agent:mime-version:in-reply-to:content-transfer-encoding; bh=zW1+kVCToGshrjsOlHWzqWZyyjL0sU+q+dAxfO9Bk/k=; b=mPOg0l0picVSpVBvItOs9zUUgwoIWnNI+eO8dq24eR3vB7aFYY1Au0MyTk2b1lRT1d 1l85jz08MGSXEGQutEsKSpBdFFHKlXkQQ60zg8IjyUNQcEArA3sOVlX0HI4xHooakMFe rc2Vsqz78Uxq8C5NS8pFilxBtv4MIfqT5mGoY62Cwez5RxjePxZVnsHRiCcn2zqbBPTL RHohE2UsUiuFWhgh2n4UMvKKgtsB8D/W1rcwfo4Amo1aqlc169q/4PrRhrmG0I0jwOTW +ud/Okoq9r7Z8BuAh/Yp1U2L4/nyvMM3mn9PVX/8OCXNb9R+AbsETyC3l6lcZPIbrypB 4ipw== X-Gm-Message-State: AEkoousUn8Z0ITkiYUwlc8I43EiMSNdlvOh5mIlhjhUhU9Ofr4IFKrRT5Su385e1cwrQaA== X-Received: by 10.46.1.149 with SMTP id f21mr25278706lji.25.1470591782146; Sun, 07 Aug 2016 10:43:02 -0700 (PDT) Received: from [192.168.1.2] ([89.169.173.68]) by smtp.gmail.com with ESMTPSA id p21sm4930784lfp.4.2016.08.07.10.43.01 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Sun, 07 Aug 2016 10:43:01 -0700 (PDT) Subject: Re: svn commit: r303716 - head/crypto/openssh To: Slawa Olhovchenkov References: <9a01870a-d99d-13a2-54bd-01d32616263c@fastmail.net> <30e655d1-1df7-5e2a-fccb-269e3cea4684@freebsd.org> <20160807125227.GC22212@zxy.spb.ru> <7237f5e6-fd65-a7e5-7751-4ed1c464b39a@freebsd.org> <4D28752C-0584-4294-9250-FA88B0C6E805@bsdimp.com> <32b82f9f-7f78-6358-030a-90aed54bb8a8@freebsd.org> <0740b662-4a36-f834-229a-d16a5a6dde14@freebsd.org> <20160807173734.GD22212@zxy.spb.ru> Cc: Bruce Simpson , Warner Losh , src-committers@freebsd.org, svn-src-all@freebsd.org, Oliver Pinter , svn-src-head@freebsd.org, =?UTF-8?Q?Dag-Erling_Sm=c3=b8rgrav?= From: Andrey Chernov Message-ID: <2dd7e952-ca28-57cb-ac8a-39d895b51d06@freebsd.org> Date: Sun, 7 Aug 2016 20:43:00 +0300 User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:45.0) Gecko/20100101 Thunderbird/45.2.0 MIME-Version: 1.0 In-Reply-To: <20160807173734.GD22212@zxy.spb.ru> Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit X-BeenThere: svn-src-all@freebsd.org X-Mailman-Version: 2.1.22 Precedence: list List-Id: "SVN commit messages for the entire src tree \(except for " user" and " projects" \)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 07 Aug 2016 17:43:05 -0000 On 07.08.2016 20:37, Slawa Olhovchenkov wrote: > On Sun, Aug 07, 2016 at 08:34:55PM +0300, Andrey Chernov wrote: > >> On 07.08.2016 20:31, Andrey Chernov wrote: >>> On 07.08.2016 19:14, Bruce Simpson wrote: >>>> On 07/08/16 15:40, Warner Losh wrote: >>>>> That’s a cop-out answer. We, as a project, need to articulate to our >>>>> users, whom we care about, why this rather obnoxious hit to usability >>>>> was taken. The answer must be more complete than “We just disabled >>>>> it because upstream disabled it for reasons we’re too lazy to explain >>>>> or document how to work around" >>>> >>>> Alcatel-Lucent OmniSwitch 6800 login broken (pfSense 2.3.2 which >>>> accepted the upstream change, workaround no-go) >>>> >>>> [2.3.2-RELEASE][root@gw.lab]/root: ssh -l admin >>>> -oKexAlgorithms=+diffie-hellman-group1-sha1 192.168.1.XXX >>>> Fssh_ssh_dispatch_run_fatal: Connection to 192.168.1.XXX port 22: DH GEX >>>> group out of range >>>> >>> >>> DH prime size must be at least 2048, openssh now refuse lower values. >>> Commonly used DH size 1024 can be easily broken. See https://weakdh.org >>> >> diffie-hellman-group1-sha1 use DH 1024 and insecure sha1 both. > > IMHO, this is wrong choise: totaly lost of control now vs teoretical > compromise of control in the future. Please note that it was not my choice and I can't answer what to do with non-upgradeable hardware question, address it to the author. I just tell you _why_ it happens.