CVEvulnerability

CVE-2020-27211

5.7 MEDIUM Published 2021-05-21 Modified 2026-06-17 Official page ↗

Status: Modified
Published: 2021-05-21
Last modified: 2026-06-17
Assigner: [email protected]
CVSS 3.1 ([email protected]): 5.7 MEDIUM — CVSS:3.1/AV:P/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
CVSS 2.0 ([email protected]): 3.3 LOW — AV:L/AC:M/Au:N/C:P/I:P/A:N
Weaknesses: CWE-203

Description

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.

Affected configurations

• nordicsemi nrf52840 firmware (<= 2020-10-19)

Weakness · CWE (1)

CWE-203 Observable Discrepancy weakness

Referenced by CWE · observed example (3)

CWE-1300 Improper Protection of Physical Side Channels weakness
CWE-1319 Improper Protection against Electromagnetic Fault Injection (EM-FI) weakness
CWE-1419 Incorrect Initialization of Resource weakness

References

https://eprint.iacr.org/2021/640 Third Party Advisory
https://infocenter.nordicsemi.com/pdf/in_133_v1.0.pdf Third Party Advisory
https://limitedresults.com/2020/06/nrf52-debug-resurrection-approtect-bypass/ Third Party Advisory
https://www.aisec.fraunhofer.de/de/das-institut/wissenschaftliche-exzellenz/security-and-trust-in-open-source-security-tokens.html Third Party Advisory
https://www.aisec.fraunhofer.de/en/FirmwareProtection.html Third Party Advisory
https://eprint.iacr.org/2021/640 Third Party Advisory
https://infocenter.nordicsemi.com/pdf/in_133_v1.0.pdf Third Party Advisory
https://limitedresults.com/2020/06/nrf52-debug-resurrection-approtect-bypass/ Third Party Advisory
https://www.aisec.fraunhofer.de/de/das-institut/wissenschaftliche-exzellenz/security-and-trust-in-open-source-security-tokens.html Third Party Advisory
https://www.aisec.fraunhofer.de/en/FirmwareProtection.html Third Party Advisory