[[H]ard OCP] A Reminder from AMD: Our Processors Aren't Affected by New "SPOILER" Vulnerability - Overclock.net - An Overclocking Community

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[[H]ard OCP] A Reminder from AMD: Our Processors Aren't Affected by New "SPOILER" Vulnerability

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post #1 of 67 (permalink) Old 03-17-2019, 02:57 PM - Thread Starter
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[[H]ard OCP] A Reminder from AMD: Our Processors Aren't Affected by New "SPOILER" Vulnerability

Quote:
AMD has published a support article confirming its chips should be immune to "SPOILER," a new CPU vulnerability outlined by computer scientists at Worcester Polytechnic Institute and the University of Lubeck. As explained in their paper, SPOILER takes advantage of "a weakness in the address speculation of Intel’s proprietary implementation of the memory subsystem." This makes it easier for memory attacks such as "Rowhammer" to be carried out, but evidently, only Intel users need worry.

https://www.hardocp.com/news/2019/03...vulnerability/
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post #2 of 67 (permalink) Old 03-17-2019, 03:26 PM
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post #3 of 67 (permalink) Old 03-17-2019, 05:38 PM
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Another click bait title by HardOCP

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We believe that our products are not susceptible to this issue because of our unique processor architecture.
How about you release an article when you confirm that your products are not susceptible?

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post #4 of 67 (permalink) Old 03-17-2019, 05:51 PM
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Quote: Originally Posted by WannaBeOCer View Post
Another click bait title by HardOCP



How about you release an article when you confirm that your products are not susceptible?
Because that costs them money, and may prove their statement to be false.
Right now it is 100% confirmed that Intel are affected by yet another vulnerability. And there is zero evidence that AMD processors are affected by this latest issue. Why would they risk that exposure? Though chances are that AMD have already investigated it and didnt find any similar weakness.

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post #5 of 67 (permalink) Old 03-17-2019, 06:07 PM
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Quote: Originally Posted by WannaBeOCer View Post
Another click bait title by HardOCP



How about you release an article when you confirm that your products are not susceptible?
I agree that they should do some testing but they likely didn't or maybe can't because the exploit simply doesn't apply since their cache verifies it's contents and won't run instructions that shouldn't be there. This seems like an exploit based around Intel's cache not doing that and if that's the case you couldn't perform the exploit to test it.

I'm having a hard time trying to explain it but I hope you see what I mean.


Also it's not from OCP, they're just spreading what AMD posted, likely because when this came out there were thousands of people wondering if their AMD chips were at risk.


https://www.amd.com/en/support/kb/faq/pa-240
Quote:
We are aware of the report of a new security exploit called SPOILER which can gain access to partial address information during load operations. We believe that our products are not susceptible to this issue because of our unique processor architecture. The SPOILER exploit can gain access to partial address information above address bit 11 during load operations. We believe that our products are not susceptible to this issue because AMD processors do not use partial address matches above address bit 11 when resolving load conflicts.

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post #6 of 67 (permalink) Old 03-17-2019, 07:03 PM
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Quote: Originally Posted by white owl View Post
I agree that they should do some testing but they likely didn't or maybe can't because the exploit simply doesn't apply since their cache verifies it's contents and won't run instructions that shouldn't be there. This seems like an exploit based around Intel's cache not doing that and if that's the case you couldn't perform the exploit to test it.

I'm having a hard time trying to explain it but I hope you see what I mean.


Also it's not from OCP, they're just spreading what AMD posted, likely because when this came out there were thousands of people wondering if their AMD chips were at risk.
I quoted AMD's article, they never said their products aren't affected by the new spoiler vulnerability. They said they believe they aren't affected. Tom's Hardware title is even worse since it says "AMD Confirms" https://www.tomshardware.com/news/am...ity,38841.html

I'll quote it again

Quote:
We believe that our products are not susceptible to this issue

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post #7 of 67 (permalink) Old 03-17-2019, 07:39 PM
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Quote: Originally Posted by WannaBeOCer View Post
I quoted AMD's article, they never said their products aren't affected by the new spoiler vulnerability. They said they believe they aren't affected. Tom's Hardware title is even worse since it says "AMD Confirms" https://www.tomshardware.com/news/am...ity,38841.html

I'll quote it again

CPU's are so complex that they can't vouch for something that could be even remotely similar ("gain access to partial address information during load operations") coming to light and then being perceived by the shareholders as having been deceitful, hence why they are very cautious.

Still, at least this exact type of attack seems impossible, and it would be reckless (read: lawsuits) of AMD to produce the statement below in bold if they hadn't actually tested the scenario:


Quote:
We are aware of the report of a new security exploit called SPOILER which can gain access to partial address information during load operations. We believe that our products are not susceptible to this issue because of our unique processor architecture. The SPOILER exploit can gain access to partial address information above address bit 11 during load operations. We believe that our products are not susceptible to this issue because AMD processors do not use partial address matches above address bit 11 when resolving load conflicts.

They are using the same phrasing as with Foreshadow:

https://www.amd.com/en/corporate/security-updates


Quote:
Foreshadow

8/14/18 – Updated
As in the case with Meltdown, we believe our processors are not susceptible to these new speculative execution attack variants: L1 Terminal Fault – SGX (also known as Foreshadow) CVE 2018-3615, L1 Terminal Fault – OS/SMM (also known as Foreshadow-NG) CVE 2018-3620, and L1 Terminal Fault – VMM (also known as Foreshadow-NG) CVE 2018-3646, due to our hardware paging architecture protections. We are advising customers running AMD EPYC™ processors in their data centers, including in virtualized environments, to not implement Foreshadow-related software mitigations for their AMD platforms.

For what it's worth, nobody has managed to prove otherwise up until now, it seems that AMD does not have the L1 Terminal Fault problem. They even advised customers to not implement Foreshadow mitigations.

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post #8 of 67 (permalink) Old 03-17-2019, 07:55 PM
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post #9 of 67 (permalink) Old 03-17-2019, 08:22 PM
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Intel is open to yet another security flaw and the problem is... AMD probably not being open to it? AMD is the bad guy in this situation?

Break free of the blue spell here for a second and think about that

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post #10 of 67 (permalink) Old 03-17-2019, 08:30 PM
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Quote: Originally Posted by WannaBeOCer View Post
I quoted AMD's article, they never said their products aren't affected by the new spoiler vulnerability. They said they believe they aren't affected. Tom's Hardware title is even worse since it says "AMD Confirms" https://www.tomshardware.com/news/am...ity,38841.html

I'll quote it again
So how is it clickbait? The exploit doesn't really apply so that's pretty similar to the title I've had come up with.
AMD did confirm that they aren't affected, they did not come out and say that it's impossible to attack the cache or ram. They need to be just a little bit vague in case someone figures out a similar but different way to do the same to AMD. As soon as you say it can't be done, someone will accept the challenge.

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