I See Dead µops: Leaking Secrets via Intel/AMD Micro-Op Caches
I See Dead µops: Leaking Secrets via Intel/AMD Micro-Op Caches
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我看到死微操作:通过 Intel/AMD 微操作缓存泄露秘密
DOI:
10.1109/isca52012.2021.00036
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发表时间:
2021
期刊:
影响因子:
--
通讯作者:
Venkat, Ashish
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文献类型:
--
作者:
Ren, Xida;Moody, Logan;Taram, Mohammadkazem;Jordan, Matthew;Tullsen, Dean M.;Venkat, Ashish
Modern Intel, AMD, and ARM processors translate complex instructions into simpler internal micro-ops that are then cached in a dedicated on-chip structure called the micro-op cache. This work presents an in-depth characterization study of the micro-op cache, reverse-engineering many undocumented features, and further describes attacks that exploit the micro-op cache as a timing channel to transmit secret information. In particular, this paper describes three attacks – (1) a same thread cross-domain attack that leaks secrets across the user-kernel boundary, (2) a cross-SMT thread attack that transmits secrets across two SMT threads via the micro-op cache, and (3) transient execution attacks that have the ability to leak an unauthorized secret accessed along a misspeculated path, even before the transient instruction is dispatched to execution, breaking several existing invisible speculation and fencing-based solutions that mitigate Spectre.
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DOI:
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发表时间:
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期刊:
2020 53rd Annual IEEE/ACM International Symposium on Microarchitecture (MICRO)
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作者:
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DOI:
10.1109/isca45697.2020.00022
发表时间:
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期刊:
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影响因子:
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作者:
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通讯作者:
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