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by jcranmer
3085 days ago
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It's sort of been well-known that speculative execution opens up the possibility of side-channel attacks for quite some time. Hell, it's long-known that SMT (e.g., HyperThreading) can leak keys in a not-really-fixable way. What's new and surprising is the power of these side-channel attacks--you can use these, reliably, to exfiltrate arbitrary memory, including across privilege modes in some cases (apparently, some ARM cores are affected by the latter vulnerability, in addition to Intel). |
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