New hardware device can RAM into encrypted memory, expose your data

Computer security researchers have identified a design flaw in modern encryption hardware that allows access to protected memory in notionally confidential computing environments. But the attacker would need physical access to the victim system. Boffins affiliated with KU Leuven, ETH Zurich, Durham University, and Google have found that scalable memory encryption hardware fails to check whether the data in memory is fresh. As a result, they've been able to devise a small hardware interposer, dubbed DDRop, that when wired to an appropriate circuit board, interferes with DDR5 write operations. Unable to tell that memory isn't fresh, a protected VM becomes vulnerable to a replay attack that uses stale, attacker-selected data. They describe...

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