Arm acknowledges side-channel attack but denies Cortex-M is crocked
at the Black Hat Asia infosec conference last week – titled"Hand Me Your Secret, MCU! Microarchitectural Timing Attacks on Microcontrollers are Practical" – alleged that the chip design firm's microcontrollers are susceptible to side-channel attacks.
The researchers are calling their discovery the first microarchitectural side-channel attack for MCUs. A side-channel attack is a technique which uses observation to recover or steal information about a system, thus bypassing CPU memory isolation protections.
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