[Beowulf] [upgrade strategy] Intel CPU design bug & security flaw - kernel fix imposes performance penalty
tjrc at sanger.ac.uk
Sun Jan 7 12:17:41 PST 2018
It seems fairly clear to me that any processor which performs speculative execution will be vulnerable to timing attacks of this nature.
I was pointed to a very much simplified but very clear explanation of this in a blog post by Eben Upton (of Raspberry Pi fame):
Well worth reading, and relatively accessible for people who aren’t super-nerds, so a good one to send to friends and family who are interested.
On 05/01/2018, 19:14, "Beowulf on behalf of Christopher Samuel" <beowulf-bounces at beowulf.org on behalf of chris at csamuel.org> wrote:
On 06/01/18 03:46, Jonathan Aquilina wrote:
> Chris on a number of articles I read they are saying AMD's are not
> affected by this.
That's only 1 of the 3 attacks to my understanding. The Spectre paper says:
# Hardware. We have empirically verified the vulnerability of several
# Intel processors to Spectre attacks, including Ivy Bridge, Haswell
# and Skylake based processors. We have also verified the
# attack’s applicability to AMD Ryzen CPUs. Finally, we have
# also successfully mounted Spectre attacks on several Samsung and
# Qualcomm processors (which use an ARM architecture) found in popular
# mobile phones.
All the best,
Chris Samuel : http://www.csamuel.org/ : Melbourne, VIC
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