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Boffins find if you torture AMD Zen+, Zen 2 CPUs enough, they are vulnerable to Meltdown-like attack

mmj_uk said:
Are they immune though? the paper talks about "Zen family" and lists only Zen+/Zen2 models as having being tested. Their conclusion sounds pretty generic but that it was only verified by them on Zen+/Zen2.
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Zen 1 double jabbed
Zen 2 double jabbed and tested positive for antibodies.
Zen 3 double jabbed and tested positive for antibodies+Tcells
 
Natural immunity is better so the question is did AMD find and fix the flaw before Zen3 launched? It just sounds like they didn't test any Zen3 CPU so didn't mention it.
 
mmj_uk said:
Natural immunity is better so the question is did AMD find and fix the flaw before Zen3 launched? It just sounds like they didn't test any Zen3 CPU so didn't mention it.
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You shouldn't read too much in to how idiots write headlines, if they tested Zen and Zen 2 they will have tested Zen 3.
 
Ice Tea said:
https://www.theregister.com/2021/08/30/amd_meltdown_zen/

I lost interest when it became apparent that it's not as straight forward as exploiting intel...
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Eventually give it long enough these kind of attacks and other clever exploits will be found on just about any hardware if there is a reason for people to keep trying - not to say Intel could or couldn't have done more to prevent them in the first place but Intel's problem was just dragging out iterations of hardware for over a decade.

Second paragraph of that article is pertinent:

Exploiting this weakness is an academic exercise, it seems; there are more practical and easier ways for malware and malicious users to interfere with systems. If anything, it reminds us that modern CPU architectures have all kinds of side-channels, with some probably still left to find.
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At least for desktop users most of these kind of attacks are a long way behind other forms of malware in terms of threat - though that can be a different story in server/multi-user (i.e. VM/VPS) environments.
 
humbug said:
You shouldn't read too much in to how idiots write headlines, if they tested Zen and Zen 2 they will have tested Zen 3.
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I read the paper it lists what CPU's were tested and there is no mention of a Zen3 processor, just the models in the article. If they had tested Zen3 it would be listed/mentioned along with the result of the test otherwise what would be the point in testing it.

They didn't test an original Zen (1st gen) CPU either but you'd assume given that later models are affected by it then so will they be.
 
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mmj_uk said:
I read the paper it lists what CPU's were tested and there is no mention of a Zen3 processor, just the models in the article. If they had tested Zen3 it would be listed/mentioned along with the result of the test otherwise what would be the point in testing it.

They didn't test an original Zen (1st gen) CPU either but you'd assume given that later models are affected by it then so will they be.
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Strange that they didn't.
 
I though AMD came out and said Zen 3 was susceptible?

And not being as simple to exploit as Intel is moot, when has that ever stopped anyone.

I dare to say it makes AMD a larger target, even simply for bragging rights.
 
jigger said:
Intel went the natural route and developed long COVID.
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I was just thinking while funny and not so funny, this Spectre/Meltdown thing feels like Covid variants for processors. It never goes away and keeps coming back to haunt them.
 
Theres probably a lot more security flaws with amd cpus but since they dont pay a bug bounty like intel do people dont go looking for the bugs.
 
Pretty sure other companies pay people to find bugs in AMD products…

But lol, Intel’s payment is for silence! to keep the issues out of the public domain. How many flaws have Intel managed to hide so far?
 
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