3 Jan
2018
3 Jan
'18
7:53 a.m.
http://www.theregister.co.uk/2018/01/02/intel_cpu_design_flaw/
Including here as it concerns Unix kernel and leaking memory from kernel
space to userland.
This is big -- it appears this is a fundamental Intel bug that exists in
all x86_64 CPUs.
It will be interesting to watch the ramifications and impact of this on the
industry as a whole.
--Andy
3 Jan
3 Jan
11:57 a.m.
I think it’s much ado about nothing. In fact, nearly the same bug cropped up in the 386
and we had to hack around it in UNIX then (in the 32 bit pentiums you can use one of the
segment registers to provide a second layer of security over paging. Alas, this doesn’t
work on the 64 bit addressing mode).
From: TUHS [mailto:tuhs-bounces@minnie.tuhs.org] On Behalf Of Andy Kosela
Sent: Wednesday, January 3, 2018 2:54 AM
To: The Eunuchs Hysterical Society
Subject: [TUHS] OT: critical Intel design flaw
http://www.theregister.co.uk/2018/01/02/intel_cpu_design_flaw/
Including here as it concerns Unix kernel and leaking memory from kernel space to
userland.
This is big -- it appears this is a fundamental Intel bug that exists in all x86_64 CPUs.
It will be interesting to watch the ramifications and impact of this on the industry as a
whole.
--Andy
2:22 p.m.
On Wed, Jan 3, 2018, at 06:57, Ron Natalie wrote:
I think it’s much ado about nothing. In fact, nearly
the same bug
cropped up in the 386 and we had to hack around it in UNIX then (in the
32 bit pentiums you can use one of the segment registers to provide a
second layer of security over paging. Alas, this doesn’t work on the
64 bit addressing mode).
To my understanding, what's leaking is the addresses (and possibly physical
addresses), which are in turn usable in a "rowhammer"-style attack - something
that didn't exist (or wasn't known, anyway) in the 386 era.
2316
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2316
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2 comments
3 participants
participants (3)
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Andy Kosela -
Random832 -
Ron Natalie