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 Posted: Tue, 28th Jan 2020 10:11 Post subject: ***** |
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*****
Last edited by Areius on Fri, 19th Sep 2025 16:25; edited 1 time in total
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| Posted: Tue, 28th Jan 2020 17:16 Post subject: |
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New CacheOut Speculative Execution Vulnerability Hits Intel Processors
Intel is not spared when it comes to the number of vulnerabilities that keep hitting their processors. The latest one is CacheOut, a new speculative execution attack that is capable of leaking data from Intel CPUs across many security boundaries. All processors up-to-the recent Coffee lake refresh are effected.
Despite Intel's attempts to address previous generations of speculative execution attacks, CPUs are still vulnerable, allowing attackers to exploit these vulnerabilities to leak sensitive data. Unlike previous MDS issues, the researchers show in their work how an attacker can exploit the CPU's caching mechanisms to select what data to leak, as opposed to waiting for the data to be available.
They then demonstrate that CacheOut can violate nearly every hardware-based security domain, leaking data from the OS kernel, co-resident virtual machines, and even SGX enclaves. CacheOut can bypass software fixes. Making it possible to extract data from both the kernel of the OS and from virtual machines, and also from something that Intel calls 'software guard extensions' (SGX) that normally is stored securely.
Researchers from the University of Michigan and the University of Adelaide have found this new bug, and posted a paper on it. Read the paper. It seems that once again only Intel processors are affected including Core, Xeon and Atom models. AMD is save from this vulnerability.
sause: https://www.guru3d.com/news-story/new-cacheout-speculative-execution-vulnerability-hits-intel.html
| Lutzifer wrote: | | and yes, mine is only average |
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Frant
King's Bounty
Posts: 24950
Location: Your Mom
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| Posted: Tue, 28th Jan 2020 17:29 Post subject: |
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And another microcode update that may affect performance. I wonder how big the aggregate performance hit from the new and all previous microcode fixes is by now.
Ph'nglui mglw'nafh Cthulhu R'lyeh wgah'nagl fhtagn!
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| Posted: Tue, 28th Jan 2020 17:58 Post subject: |
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The affected CPU's aren't from an era where AMD was strong though. The 6000 series are from 2015 and Ryzen wasn't released until 2017. So if they cut corners, it wasn't to beat AMD.
If Ryzen hadn't come around, we'd be still buying the same re-hashed 4-core Intel CPU's with 50MHz more here and there... and of course every update would require a new mainboard 
*hugsHis3800X*
*getsAnIcepackFromTheFridgeToCoolHisBurnedFace*
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| Posted: Tue, 28th Jan 2020 19:58 Post subject: |
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| sabin1981 wrote: | 
True enough, though this isn't just about Ryzen.. it goes all the way back to the Core2 processors and Intel vs AMD's Athlon/FX range too. Always cutting corners. I love my R5-2600X but I'm definitely going to drop in a 3600 at some point, the IPC jump between Zen+ and Zen2 is great \o/
Oh and speaking of Zen+
https://www.techspot.com/review/1977-amd-ryzen-1600-af/
$85 brand new for a Ryzen 2600 slighly underclocked and rebranded as a Ryzen 1600AF  |
It’s cheap af
Ryzen 9850X3D CO Per Core ~-29 | Light Loop 360 & 3x Phanteks T30 | ProArt X870E-CREATOR WIFI | MSI GeForce RTX 5090 Ventus OC | Fury Renegade RGB 64GB (2x 32GB) DDR5 6400MHz C32 @ 6000MHz C28 | FURY Renegade G5 4TB PCIe 5.0 | 40" G75F | S.M.S.L RAW-MDA1 & HiFiMAN Arya Organic | Lancool III Snow White + 4x be quiet! Silent Wings Pro 4 140mm | HX1200i | G Pro X SUPERLIGHT 2 & POWERPLAY | Win 11 Pro | Logitech MX MECHANICAL
Sometimes I publish YouTube videos: https://www.youtube.com/@RandomTechChannel |
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| Posted: Tue, 28th Jan 2020 20:11 Post subject: |
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| Posted: Tue, 28th Jan 2020 20:15 Post subject: ***** |
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*****
Last edited by Areius on Fri, 19th Sep 2025 16:25; edited 1 time in total
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| Posted: Tue, 28th Jan 2020 20:20 Post subject: |
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Except there hasn't been a single confirmed "victim" of Meltdown/Spectre in the wild, just because something "can" happen doesn't mean it "will" -- which is the nature of speculative attacks.
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Przepraszam
VIP Member
Posts: 14809
Location: Poland. New York.
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| Posted: Tue, 28th Jan 2020 23:25 Post subject: |
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I guess my next upgrade will be AMD at this rate 
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| Posted: Tue, 28th Jan 2020 23:28 Post subject: |
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BTW wasn't there some power target fix for the 3800 to let it run at 3700 levels?
| sabin1981 wrote: | | $85 brand new for a Ryzen 2600 slighly underclocked and rebranded as a Ryzen 1600AF |
I got the 2600x for 94€ (incl. taxes) during black friday 
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| Posted: Tue, 28th Jan 2020 23:32 Post subject: |
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I bought mine in November 2018, cost me roughly £165 on a special offer, great proc \o/
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LeoNatan
☢ NFOHump Despot ☢
Posts: 75355
Location: Israel
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| Posted: Wed, 29th Jan 2020 04:33 Post subject: |
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All yalls are traitors.
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| Posted: Wed, 29th Jan 2020 05:50 Post subject: |
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| Posted: Wed, 29th Jan 2020 06:30 Post subject: |
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I've been back on AMD since the Ryzen 1700 which I recently gave away to a good friend (along with board, RAM, and an RX570) when I got a 3700x.
Intel and their shenanigans can suck my dick.
Gustave the Steel
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| Posted: Wed, 29th Jan 2020 13:12 Post subject: ***** |
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*****
Last edited by Areius on Fri, 19th Sep 2025 16:25; edited 1 time in total
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LeoNatan
☢ NFOHump Despot ☢
Posts: 75355
Location: Israel
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| Posted: Wed, 29th Jan 2020 16:58 Post subject: |
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It's a shame the updates are not optional. I agree with Sabin, the likelihood of hitting this is very low.
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| Posted: Thu, 30th Jan 2020 13:15 Post subject: |
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Welcome to party guys!
https://attack.mitre.org/
Ryzen 9850X3D CO Per Core ~-29 | Light Loop 360 & 3x Phanteks T30 | ProArt X870E-CREATOR WIFI | MSI GeForce RTX 5090 Ventus OC | Fury Renegade RGB 64GB (2x 32GB) DDR5 6400MHz C32 @ 6000MHz C28 | FURY Renegade G5 4TB PCIe 5.0 | 40" G75F | S.M.S.L RAW-MDA1 & HiFiMAN Arya Organic | Lancool III Snow White + 4x be quiet! Silent Wings Pro 4 140mm | HX1200i | G Pro X SUPERLIGHT 2 & POWERPLAY | Win 11 Pro | Logitech MX MECHANICAL
Sometimes I publish YouTube videos: https://www.youtube.com/@RandomTechChannel
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| Posted: Thu, 30th Jan 2020 18:47 Post subject: |
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no real need to swap i7 6700k for anything newer,right?
| paxsali wrote: |
Now, I don't know what hardware costs in Poland, I guess it's cheaper because everything is stolen from Germany and resold... |
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| Posted: Thu, 30th Jan 2020 19:27 Post subject: |
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| BettyShikle wrote: | | no real need to swap i7 6700k for anything newer,right? |
not for normal desktop usage/gaming. wait what intel will show to beat amd again. until then the 6700k will be just fine.
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jackbomb
Posts: 2583
Location: Tortilla de patatas
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| Posted: Thu, 30th Jan 2020 22:39 Post subject: |
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And here I am, recently adquiring a 6-core no-HT i5 9400f ;(
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| Posted: Fri, 31st Jan 2020 01:44 Post subject: |
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| sabin1981 wrote: |
Doesn't AMD/Intel push microcode updates via WUpdate too? Surely that will undo the BIOS patching you've done? |
Dunno? I'm an LTSC guy, so if they are included in any CU updates, which maybe so?, then I'm unaware.
I use all necessary means to exclude from OS also, usual Reg edits, InSpectre etc.
Over on the Gigabyte forums, we have been monitoring the last few BIOS updates, and with each iteration of the microcodes, it has dramatically declined performance, without doubt, hence, we always edit latest BIOS with the fastest ones tested.
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| Posted: Fri, 31st Jan 2020 02:15 Post subject: |
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| sabin1981 wrote: | 
Honestly, I'm with Leo; we should be given the CHOICE. End-users should be given the choice whether to be forced into mitigation patches or not. |
I agree, wholeheartedly.
Of course, some will lose out on this procedure, as in the likes of my board, no 9900KS support, if you wish the fastest codes, as the ones that do run well, pre-date this chip
So yeah, forced is correct, for some, awful!
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| Posted: Fri, 31st Jan 2020 10:46 Post subject: |
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God damn Anti-Patchers! Patches do not lead to performance drops! Every non-patched CPU can infect a number of also non-patched CPUs! We have to increase the herd immunity 
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