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Eric Brandwine (VP/DE @ AWS) said publicly in 2019 that EC2 had never scheduled different tenants on the same physical core at the same time, even before we lea
by segfaultbuserr 3y ago
Eric Brandwine (VP/DE @ AWS) said publicly in 2019 that EC2 had never scheduled different tenants on the same physical core at the same time, even before we learned about these kinds of side-channel attacks.
https://www.youtube.com/watch?v=kQ4H6XO-iao&t=2485s https://www.youtube.com/watch?v=kQ4H6XO-iao&t=2485s
- yencabulator 3y agoYes (lowest vCPU seems to be 2 everywhere), and that protects against this attack. However, this thread was talking about airgapping hosts, which is needed for the general threat of VM escapes.
- fulafel 3y agoAt least Fargate and Lightsail can select < 2 vCPU. (and maybe micro EC2 instance types?)
- yencabulator 3y agoWell, that does sound like those were vulnerable then, if they happened to run on Zen 2. (Obviously microcode patched by now.) As usual, cost is the biggest hindrance to security.
- vetrom 3y agoEven before then, the sufficiently paranoid (but still bound to AWS for whatever reason) would track usage/steal/IO reporting along with best guesses for Amazon hardware expidenture and use that information to size instances to attempt to coincide with 1:1 node membership.