CVE-2020-27208

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    CVE-2020-27208

    Published: 21 May 2021Last Modified: 5 Feb 2026

    Summary:

    Details: 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.

    References: https://solokeys.com, https://twitter.com/SoloKeysSec, https://eprint.iacr.org/2021/640, https://github.com/solokeys/solo/commit/a9c02cd354f34b48195a342c7f524abdef5cbcec, https://www.aisec.fraunhofer.de/de/das-institut/wissenschaftliche-exzellenz/security-and-trust-in-open-source-security-tokens.html, https://www.aisec.fraunhofer.de/en/FirmwareProtection.html, https://github.com/solokeys/solo/commit/a9c02cd354f34b48195a342c7f524abdef5cbcec, https://www.aisec.fraunhofer.de/en/FirmwareProtection.html

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 0
    Fixed -a9c02cd354f34b48195a342c7f524abdef5cbcec

    Affected versions

    1.0.1
    1.0.2

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High
    CVE-2020-27208 | CVE-DB