Date: Mon, 8 Jan 2018 13:24:03 -0500 From: Baho Utot <baho-utot@columbus.rr.com> To: freebsd-questions@freebsd.org Subject: =?UTF-8?Q?Re:_Meltdown_=e2=80=93_Spectre?= Message-ID: <64ee0030-8fef-0380-3b6e-b969d8ddb69f@columbus.rr.com> In-Reply-To: <ecaf7b87-3455-dc63-f67a-dbb1f5eb9354@kicp.uchicago.edu> References: <f9cc484e-be92-7aff-52fe-38655e85dbaa@columbus.rr.com> <CAH78cDqPnOUGoU=6x-BiugnpjmjYcd=CZS3fSNaX5tq-Uvma7g@mail.gmail.com> <bc9ad15b-a718-b901-76fa-bc43ce0c1f1a@columbus.rr.com> <3AECDC7F-8838-4C09-AC7F-117DFBAA326C@sigsegv.be> <20180108085756.GA3001@c720-r314251> <CAGBxaXnSRwtS=mbdsePyKvyZjTpu1tvo2O61SW60yQfdDJH4gA@mail.gmail.com> <48211515-cc6b-522b-ccd2-4d0c1f6a2072@columbus.rr.com> <CAGBxaXm=6NbZ%2Bcz6WGB7YY7NT_%2BxOhdxb17ORTsQs5e7RvqKaQ@mail.gmail.com> <ecaf7b87-3455-dc63-f67a-dbb1f5eb9354@kicp.uchicago.edu>
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On 1/8/2018 1:11 PM, Valeri Galtsev wrote: > > > On 01/08/18 06:37, Aryeh Friedman wrote: >> On Mon, Jan 8, 2018 at 7:28 AM, Baho Utot <baho-utot@columbus.rr.com> >> wrote: >> >>> >>> >>> On 1/8/2018 4:15 AM, Aryeh Friedman wrote: >>> >>>> On Mon, Jan 8, 2018 at 3:57 AM, Matthias Apitz <guru@unixarea.de> >>>> 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@. > > Thanks, Aryeh! Your posts made my day today. > > Valeri > > CERT states this: http://www.kb.cert.org/vuls/id/584653 FreeBSD Project Affected-05 Jan 2018
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