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STM32F205 write-protection issue

Reported on February 12, 2018

The bootloader memory write-protection is not working as intended in the STM32F205, which is used in the Trezor One. The issue was solved by activating the Memory Protection Unit, keeping the bootloader safe from unauthorized write-access.

Reported by Saleem Rashid
Trezor Model One

Resolved vulnerabilities

Reported by community. Investigated. Resolved. Because your security is never optional.