Vulnerability in Nitrokey Fido2
CVE-2020-27208
The flash read-out protection (RDP) level is not enforced during the device initialization phase of the SoloKeys Solo 4.0.0 & Somu and the Nitrokey FIDO2 token. This allows an adversary to downgrade the RDP level and access secrets such as private ECC keys from SRAM via the debug interface.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.8 (Medium). Vector: CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.003 (23.4th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 23rd percentile — 23.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: 0.000
Affected products
Weakness classification (CWE)
References
- www.aisec.fraunhofer.de/en/FirmwareProtection.html (Exploit, Third Party Advisory)
- twitter.com/SoloKeysSec (Product)
- solokeys.com (Product)
- eprint.iacr.org/2021/640 (Third Party Advisory)
- github.com/solokeys/solo/commit/a9c02cd354f34b48195a342c7f524abdef5cbcec (Patch, Third Party Advisory)
- www.aisec.fraunhofer.de/de/das-institut/wissenschaftliche-exzellenz/security-an… (Third Party Advisory)
Frequently asked questions
- What is CVE-2020-27208?
- CVE-2020-27208 is a medium-severity vulnerability in Nitrokey Fido2, classified under Inadequate Encryption Strength. CVSS score: 6.8/10. Published 2021-05-21.
- How severe is CVE-2020-27208?
- Medium severity. CVSS v3 base score is 6.8 out of 10.