Remote Scheduler Contention Attacks
<|reference_start|>Remote Scheduler Contention Attacks: In this paper, we investigate unexplored aspects of scheduler contention: We systematically study the leakage of all scheduler queues on AMD Zen 3 and show that all queues leak. We mount the first scheduler contention attacks on Zen 4, with a novel measurement method evoking an out-of-order race condition, more precise than the state of the art. We demonstrate the first inter-keystroke timing attacks based on scheduler contention, with an F1 score of $\geq$ 99.5 % and a standard deviation below 4 ms from the ground truth. Our end-to-end JavaScript attack transmits across Firefox instances, bypassing cross-origin policies and site isolation, with 891.9 bit/s (Zen 3) and 940.7 bit/s (Zen 4).<|reference_end|>
@article{gast2024remote,
    title={Remote Scheduler Contention Attacks},
    author={Stefan Gast and Jonas Juffinger and Lukas Maar and Christoph Royer and
  Andreas Kogler and Daniel Gruss (Graz University of Technology)},
    journal={arXiv preprint arXiv:2404.07042},
    year={2024},
    archivePrefix={arXiv},
    eprint={2404.07042},
    primaryClass={cs.CR}
}