[Phoronix] Intel 又爆漏洞



影響Haswell - Coffeelake 。只可以partial fix。未知AMD有無同一問題。

"Intel has implemented its mitigation for the SRBDS vulnerability in a microcode update distributed to software vendors on Tuesday June 9, 2020 or earlier. The mitigation locks the entire memory bus before updating the staging buffer and only unlocks it after clearing its content. This strategy ensures no information is exposed to offcore requests issued from other CPU cores. Due to the considerable performance overhead of locking the entire system’s memory bus, Intel only applied the mitigation to harden a small number of security-critical instructions, specifically RDRAND, RDSEED, and EGETKEY (a leaf of the ENCLU instruction). This means that output from any other instruction (e.g., RDMSR) that issues offcore requests can be still leaked across CPU cores."

https://www.phoronix.com/scan.ph ... erability&num=1

https://www.vusec.net/projects/crosstalk/

patch again, - 20% performance

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Coffeelake 即係 9XXX 喎
最新果 D 冇事?
係咪 intel 自己爆 D 漏洞逼你 UPGRADE

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我覺得自己已經習慣左.....冇咩感覺了.

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當某一日, 有新聞話Intel CPU無新漏洞, 全世界一定震驚。

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patch again, - 20% performance
funny1 發表於 2020-6-10 14:16


好快慢到用唔到。

之後公司又更換intel机,loopX∞

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Coffeelake 即係 9XXX 喎
最新果 D 冇事?
係咪 intel 自己爆 D 漏洞逼你 UPGRADE  ...
doggiestyle 發表於 2020-6-10 14:49


Cascade Lake 之後無事。

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回覆 7# Stiggy930


    未發現啫

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其實Haswell - Coffeelake patch晒剩返幾多percent performance...

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回覆 1# Stiggy930


    咁搞法,幾快既CPU都沒用

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