MCU - LimitedResults

Enter the EFM32 Gecko

Posted on June 22, 2021June 26, 2021 by LimitedResults

This new post presents a hardware exploit to unlock the debug port on the EFM32 Gecko MCUs Series 1 designed by Silicon Labs. Once again, after the previous nRF52 episode, this security research reveals an entire range of products vulnerable to a silicon design vulnerability. The way to unlock these chips was quite challenging and…

Nuvoton M2351 MKROM

Posted on January 12, 2020June 10, 2020 by LimitedResults

TrustZone is the last hardware security mechanism integrated to ARMv8-M. This article presents some Fault Injection results achieved on Nuvoton M2351 (Cortex-M23), targeting MKROM crypto-functions and secure Code. ARMv8-M TrustZone TrustZone technology (TZ) is NOT really a NEW security concept. It has been available on ARM Cortex-A since more than 10 years now. The TrustZone…