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Technology Stocks : AMD, ARMH, INTC, NVDA
AMD 259.65+2.3%Jan 23 3:59 PM EST
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To: neolib who wrote (35674)3/7/2020 11:50:19 AM
From: neolibRead Replies (1) of 73990
 
Here is the conclusion from the paper:

The key takeaway of this paper is that AMD’s cache way predictorsleak secret information. To understand the implementation details,we reverse engineered AMD’s L1D cache way predictor, leadingto two novel side-channel attack techniques. First, Collide+Probeallows monitoring memory accesses on the current logical corewithout the knowledge of physical addresses or shared memory.Second, Load+Reload obtains accurate memory-access traces ofapplications co-located on the same physical core.We evaluated our new attack techniques in different scenarios.We established a high-speed covert channel and utilized it in aSpectre attack to leak secret data from the kernel. Furthermore,we reduced the entropy of different ASLR implementations fromnative code and sandboxed JavaScript. Finally, we recovered a keyfrom a vulnerable AES implementation.Our attacks demonstrate that AMD’s design is vulnerable to side-channel attacks. However, we propose countermeasures in softwareand hardware, allowing to secure existing implementations andfuture designs of way predictors

They provide no estimates of performance hits using their software mitigations.

This will either be a nothingburger or a major issue for AMD's data center push.
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