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CVE-2020-27208 Detail


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.


CVSS 3.x Severity and Metrics:

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

NVD Analysts use publicly available information to associate vector strings and CVSS scores. We also display any CVSS information provided within the CVE List from the CNA.

Note: NVD Analysts have published a CVSS score for this CVE based on publicly available information at the time of analysis. The CNA has not provided a score within the CVE List.

References to Advisories, Solutions, and Tools

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Hyperlink Resource
https://eprint.iacr.org/2021/640 Third Party Advisory 
https://github.com/solokeys/solo/commit/a9c02cd354f34b48195a342c7f524abdef5cbcec Patch  Third Party Advisory 
https://solokeys.com Product 
https://twitter.com/SoloKeysSec Product 
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 Exploit  Third Party Advisory 

Weakness Enumeration

CWE-ID CWE Name Source
CWE-326 Inadequate Encryption Strength cwe source acceptance level NIST  

Known Affected Software Configurations Switch to CPE 2.2

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Change History

3 change records found show changes

Quick Info

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