TLBleed - vusec

Overview TLBleed is a new side channel attack that has been proven to work on Intel CPU’s with Hyperthreading (generally Simultaneous Multi-threading, or SMT, or HT on Intel) enabled. It relies on concurrent access to the TLB, and it being shared between threads. We find that the L1dtlb and the STLB (L2 TLB) is shared between threads on Intel CPU cores. Result This means that co-resident hyperthr

[jovi0608]

さんざん噂になってた TLBleed ですが、ようやく発表者からのアブストとpaperが出てきましたね。17秒で256bit EdDSAを98%の確率で秘密鍵を取得できるのか。こりゃすごい。 HTをdisableするしか対策がないのかな。