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No Hat 2021 - LimitedResults - The Quest of the Geckos

Analysts investigate attack surfaces and defenses concerning No Hat 2021 - LimitedResults - The Quest of the Geckos.

Summary

Targets Silicon Labs EFM32 Gecko ARM Cortex-M microcontrollers, bypassing Authentication Access Port debug protection via electromagnetic fault injection. Successful attack permanently reactivates the SWD debug interface with full flash, RAM, and register read-write access. Follows prior work on ESP32 and nRF52 debug-resurrection attacks; Silicon Labs issued Security Advisory A-00000310 confirming the findings.

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