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From the Spectre paper- We have empirically verified the vulnerability of several Intel processors to Spectre attacks, including Ivy Bridge, aswell and Skylake
by guardiangod 9y ago
From the Spectre paper-
We have empirically verified the vulnerability of several Intel processors to Spectre attacks, including Ivy Bridge, aswell 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.
So in other word, the researcher haven't tried it on AMD processors, but they think the attack would work. AMD, on the other hand, is saying the attack won't work.
Frankly, I believe in PoC||GTFO, so AMD is safe in my book for now.
- civilitty 9y agoSpectre and Meltdown are two different exploits. In this case, the paper is talking about Spectre and they did have a POC that worked on all three major processor families (except for deterministic execution engines in microcontrollers and low end CPUs from ARM as well as a few early Atoms from Intel). AMD is saying that Meltdown, which at first glance seems like the most serious one, doesn't effect their processors.
- guardiangod 9y agoI read the Spectre paper front to back. Where did the paper mention that they have a working PoC for AMD x86 CPUs?
- mike_hearn 9y agoThat seems like a rather fragile interpretation of the statement. I had interpreted it to mean they tried the attack on Ryzen and it worked. Given the general nature of their technique why would it not work on AMD chips?