From owner-freebsd-questions@freebsd.org Mon Jan 8 12:49:16 2018 Return-Path: Delivered-To: freebsd-questions@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 AB84CE6A50E for ; Mon, 8 Jan 2018 12:49:16 +0000 (UTC) (envelope-from baho-utot@columbus.rr.com) Received: from cdptpa-cmomta01.email.rr.com (cdptpa-outbound-snat.email.rr.com [107.14.166.231]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client CN "Client", Issuer "CA" (not verified)) by mx1.freebsd.org (Postfix) with ESMTPS id 682BE79667 for ; Mon, 8 Jan 2018 12:49:14 +0000 (UTC) (envelope-from baho-utot@columbus.rr.com) Received: from raspberrypi.bildanet.com ([65.186.67.174]) by cmsmtp with ESMTP id YWl9e2n1VU2piYWlCeeBCh; Mon, 08 Jan 2018 12:42:39 +0000 Received: from [192.168.1.143] by raspberrypi.bildanet.com with esmtp (Exim 4.84) (envelope-from ) id 1eYWox-0000tf-SJ for freebsd-questions@freebsd.org; Mon, 08 Jan 2018 12:46:32 +0000 Subject: =?UTF-8?Q?Re:_Meltdown_=e2=80=93_Spectre?= To: FreeBSD Mailing List References: <3AECDC7F-8838-4C09-AC7F-117DFBAA326C@sigsegv.be> <20180108085756.GA3001@c720-r314251> <48211515-cc6b-522b-ccd2-4d0c1f6a2072@columbus.rr.com> From: Baho Utot Message-ID: <87b03f62-48fb-3de7-01da-2b90fc79c549@columbus.rr.com> Date: Mon, 8 Jan 2018 07:46:26 -0500 User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:52.0) Gecko/20100101 Thunderbird/52.5.2 MIME-Version: 1.0 In-Reply-To: Content-Language: en-US X-CMAE-Envelope: MS4wfPint8yM6C/97JMEnLYnE3d9neu8fJ1V6jiHiURF53g2HTiGV8vM84+s9A/k2WfWirnmVKK+sHrF73R+caDlR2k6GKSanaqDCmQaaLy1llnnJCJee9X6 KuuxwD8+mP08N0jBpuxtvzV1vsUO8LajUBxCprPnnfquyNcXBYY2s26qmw09iGTLEKnimWHfZ6jniOhxMUNJx/JZQAFYKFIlGFU= X-Mailman-Approved-At: Mon, 08 Jan 2018 15:12:44 +0000 Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 8bit X-Content-Filtered-By: Mailman/MimeDel 2.1.25 X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.25 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 08 Jan 2018 12:49:16 -0000 On 1/8/2018 7:37 AM, Aryeh Friedman wrote: > > > On Mon, Jan 8, 2018 at 7:28 AM, Baho Utot > wrote: > > > > On 1/8/2018 4:15 AM, Aryeh Friedman wrote: > > On Mon, Jan 8, 2018 at 3:57 AM, Matthias Apitz > wrote: > > As I side note, and not related to FreeBSD: My Internet > server is run by > some webhosting company (www.1blu.de ), > they use Ubuntu servers and since > yesterday they have shutdown SSH access to the servers > argumenting that > they want > protect my (all's) servers against attacks of Meltdown and > Spectre. > > Imagine, next time we have to shutdown all IOT gadgets... > > > >   Not always possible for things like medical test > equipment/devices.  For > example I maintain a specialized EMR for interacting with Dr. > prescribed > remote cardiac monitors.   Having those off line is not an > option since > they are used to detect if the patient needs something more > serious like a > pace maker (also almost always a IoT device these days) surgery. > > The actual monitoring is done on Windows and was attacked by some > ransomeware via a bit coin miner that somehow installed it > self.   Since > all the users claim that they don't read email/upload/download > executables > or any other of the known attack vectors this leaves something like > Meltdown or Spectre.   We have also detected issues on the > CentOS that has > the non-medical corporate site on it.   The only machine left on > touched on > the physical server (running some bare metal virtualization > tool) is the > FreeBSD machine that runs the actual EMR we wrote. > > TL;DR -- It seems Linux and Windows already have issues with > these holes > but I have seen little to no evidence that FreeBSD (when run as > a host). > In general when ever any virtualization issue (like the bleed > through on > Qemu last year) comes up FreeBSD is the one OS that seems to be > immune > (thanks to good design of the OS and bhyve).   This is the main > reason why > I chose FreeBSD over Linux as the reference host for PetiteCloud. > > > This is not operating system specific,  read the papers on theses > two. it attacks the cpu, usally through a JIT > > > Please learn a little OS design theory before making insane claims. > Specifically it *ONLY* effects OS's that rely on the specific CPU > architecture (vs. a generic one).  Namely if you strictly partition the > page table between userland and kernel space (which xxxBSD has always > done and Linux has not) and don't use any CPU specific instructions to > do so (except for protected vs. unprotected mode in the original 386 > design FreeBSD does not do this while yet again microslut and linux do). > > For more info go read the more technical thread then here in -hackers@ > and -current@.