Cybersecurity · 45 views
New Interrupt Injection Attack Can Bypass Spectre v2 Defenses on Intel and AMD CPUs
INTERRUPT INJECTION lets unprivileged Linux code bypass Spectre v2 defenses and leak AMD Zen 2 kernel memory at 5.47 bytes per second.
Summary
An unprivileged Linux program can time a hardware interrupt to land in the gap between a processor sanitizing its branch predictor and the kernel using it, re-poisoning the predictor after the defense has run. MIT CSAIL researchers Daniël Trujillo and Mengjia Yan named the technique INTERRUPT INJECTION.
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