Nordic Semiconductor nRF52840 devices through 2020-10-19 have improper protection against physical side channels. The flash read-out protection (APPROTECT) can be bypassed by injecting a fault during the boot phase.
Source: https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-27211
Reference (s):
- https://eprint.iacr.org/2021/640
- https://infocenter.nordicsemi.com/pdf/in_133_v1.0.pdf
- https://limitedresults.com/2020/06/nrf52-debug-resurrection-approtect-bypass/
- https://www.aisec.fraunhofer.de/de/das-institut/wissenschaftliche-exzellenz/security-and-trust-in-open-source-security-tokens.html
- https://www.aisec.fraunhofer.de/en/FirmwareProtection.html