Four-Byte Write and Timing Bug Let Researchers Run Code in Windows SmartScreen Enclave

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Security researchers ran their own code inside a protected part of Windows that is meant to stay sealed off even when the rest of the computer is taken over.

The protected area is a VBS enclave, an isolated slice of memory the operating system uses to guard secrets, and the one they broke into handles passwords for a Windows anti-phishing feature.

The work was done in a lab as a proof of

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