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Linux Porter Discovered M1 Covert Channel Flaw Named ‘M1RACLES’


Hector Martin, a hacker who is porting Linux to Apple Silicon Macs through Asahi Linux, has discovered a novel covert channel vulnerability on the M1 chip, calling it ‘M1RACLES’ and tracked as CVE-2021-30747. The flaw lies in the design of the chip itself, allowing any two applications running under an OS to covertly exchange data between them without using memory, sockets, files, or any other features that are meant to be used for data exchange. "While this shouldn’t be allowed as it bypasses OS security layers, it is nothing to worry about in practice."

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