CVE-2021-29415

low-risk
Published 2021-05-21

The elliptic curve cryptography (ECC) hardware accelerator, part of the ARM® TrustZone® CryptoCell 310, contained in the NordicSemiconductor nRF52840 through 2021-03-29 has a non-constant time ECDSA implemenation. This allows an adversary to recover the private ECC key used during an ECDSA operation.

Do I need to act?

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0.08% chance of exploitation
EPSS score — low exploit probability
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Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
5
CVSS 5.5/10 Medium
LOCAL / LOW complexity

Affected Products (1)

Nrf52840 Firmware

Affected Vendors

Nordicsemi

References (6)

Third Party Advisory https://eprint.iacr.org/2021/640
Third Party Advisory https://www.aisec.fraunhofer.de/de/das-institut/wissenschaftliche-exzellenz/secu...
Not Applicable https://www.sit.fraunhofer.de/en/news-events/downloads-services/cve/
Third Party Advisory https://eprint.iacr.org/2021/640
Third Party Advisory https://www.aisec.fraunhofer.de/de/das-institut/wissenschaftliche-exzellenz/secu...
Not Applicable https://www.sit.fraunhofer.de/en/news-events/downloads-services/cve/
23
/ 100
low-risk
Severity 18/34 · Moderate
Exploitability 0/34 · Minimal
Exposure 5/34 · Minimal