Medium severity · published May 21, 2021
CVE-2020-27211
Nordic Semiconductor nRF52840 devices through 2020-10-19 have improper protection against physical side channels
5.7
CVSS
0.3%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:P/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
Attack vector
Physical
Complexity
High
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 22% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
NF
Nrf52840 Firmware · Nordicsemi
through 2020-10-19 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-27211
CVE.org
https://www.cve.org/CVERecord?id=CVE-2020-27211
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
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