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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+cz6WGB7YY7NT_+xOhdxb17ORTsQs5e7RvqKaQ@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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