[Various] Spectre & Meltdown: Critical vulnerabilities in modern processors - Page 168 - Overclock.net - An Overclocking Community

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[Various] Spectre & Meltdown: Critical vulnerabilities in modern processors

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post #1671 of 1814 (permalink) Old 05-03-2018, 10:41 AM
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Ah, nevermind

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post #1672 of 1814 (permalink) Old 05-03-2018, 10:53 AM
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Quote: Originally Posted by Offler View Post

So they made a similar mistake patching Meltdown on Windows 10 that they had already made when patching the 64-bit version of Windows 7?

Luckily, the Windows 7 flaw was found out earlier and has already been patched; Windows 10 was only patched now with the RS4 build and there are still no backports for earlier versions (if there ever will be is anyone's guess).

They should spend some more money on QC.

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post #1673 of 1814 (permalink) Old 05-03-2018, 10:57 AM
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Quote: Originally Posted by Pro3ootector View Post
Just for the record, I'll dump this here where it belongs:

Quote: Originally Posted by Mysticial View Post
I wonder if an AVX-based Spectre is one of the 8. This is something that we've been chatting about in the office for some time.

The idea is to use speculative execution to trigger the AVX or AVX512 offset on Intel processors. Then you can measure the speed of a piece of code against a baseline to determine whether the CPU is running at the full speed or the AVX/AVX512 speed. Which speed it's running at will tell you whether the data bit that you're attacking is a 0 or a 1.

Intel's manuals state that the AVX/AVX512 offsets can be triggered by speculation. And they stay in force for many milliseconds - that's large enough to overcome any sort of timer fuzzying mitigations that current browsers are doing.

-----

If this does turn out to be the case, I really hope the software mitigation doesn't involve disabling AVX/AVX512 instructions completely...
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post #1674 of 1814 (permalink) Old 05-03-2018, 06:31 PM
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Quote: Originally Posted by TinyRichard View Post
So, now that the e-hype, blogger noise and other various wannabe "journalists" have moved on to other clicks, what was the final tally on quantifiable damages?

Like maybe 3 PCs mining bitcoins in Montana?
Server workloads, SQL servers, Hypervisors, at least in my real world experience so far : (


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post #1675 of 1814 (permalink) Old 05-03-2018, 07:37 PM
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Looks like i'll be getting a 2700x soon

Exclusive: Spectre-NG - Multiple new Intel CPU flaws revealed, several serious
https://www.heise.de/ct/artikel/Excl...s-4040648.html
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post #1676 of 1814 (permalink) Old 05-04-2018, 02:26 AM
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Quote: Originally Posted by somethingname View Post
Looks like i'll be getting a 2700x soon

Exclusive: Spectre-NG - Multiple new Intel CPU flaws revealed, several serious
https://www.heise.de/ct/artikel/Excl...s-4040648.html
This is it. I will not allow any more update geared towards altering the behaviour and performance of my CPU. And if i can't help it, i will do everything i can to disable it.
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post #1677 of 1814 (permalink) Old 05-04-2018, 08:00 PM
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Oh dear more gimping to my Intel PCs , where does it ends !

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post #1678 of 1814 (permalink) Old 05-06-2018, 05:45 AM
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Quote: Originally Posted by somethingname View Post
Looks like i'll be getting a 2700x soon

Exclusive: Spectre-NG - Multiple new Intel CPU flaws revealed, several serious
https://www.heise.de/ct/artikel/Excl...s-4040648.html
Hi,
Yeah the gift that just keeps giving
Wonder how these will be handled bios or mostly os bubble gum patches :/

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post #1679 of 1814 (permalink) Old 05-08-2018, 08:52 PM
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Any updated info on how Intel plans to patch this new 8 vulnerabilities ?

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post #1680 of 1814 (permalink) Old 05-09-2018, 02:51 AM
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Quote: Originally Posted by chispy View Post
Any updated info on how Intel plans to patch this new 8 vulnerabilities ?

Yes, there are news and they aren't good: they delayed the patches:

[TH] Intel Postpones Patching 'Spectre NG' CPU Flaws

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