mox@lemmy.sdf.org to Technology@lemmy.worldEnglish · 6 months agoUnpatchable vulnerability in Apple chip leaks secret encryption keysarstechnica.comexternal-linkmessage-square63fedilinkarrow-up1632arrow-down17file-textcross-posted to: technology@lemmy.ml
arrow-up1625arrow-down1external-linkUnpatchable vulnerability in Apple chip leaks secret encryption keysarstechnica.commox@lemmy.sdf.org to Technology@lemmy.worldEnglish · 6 months agomessage-square63fedilinkfile-textcross-posted to: technology@lemmy.ml
minus-squareKilling_Spark@feddit.delinkfedilinkEnglisharrow-up9·edit-25 months agoSo the attack is (very basically, if I understand correctly) Setup: I control at least one process on the machine I am targeting another process on I can send data to the target process and the process will decrypt that Attack: I send data that in some intermediate state of decryption will look like a pointer This “pointer” contains some information about the secret key I am trying to steal The prefetcher does it’s thing loading the data “pointed to” in the cache I can observe via a cache side channel what the prefetcher did, giving me this “pointer” containing information about the secret key Repeat until I have gathered enough information about the secret key Is this somewhat correct? Those speculative execution vulnerabilities always make my brain hurt a little
So the attack is (very basically, if I understand correctly)
Setup:
Attack:
Is this somewhat correct? Those speculative execution vulnerabilities always make my brain hurt a little