CVE-2020-27208
MEDIUM
6.8
CVSS Score
Published: May 21, 2021 at 11:17 AM UTC
Updated: June 17, 2026 at 03:08 AM UTC
6 products affected across 2 vendorsSolo FirmwareFIDO2 FirmwareSomu Firmware
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Severity
MEDIUM6.8
Exploit prediction
EPSS 0.3%
Description
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.
Affected
Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.
Fido2· Nitrokeydevice
80%All versions
Solo· Solokeysdevice
80%All versions
Somu· Solokeysdevice
80%All versions
Remediation
No guide yetNo remediation guidance has been written for this CVE yet. What the record does show:
Patch and advisory references
References (6)
x_refsource_MISCPatchThird Party Advisory
Source: [email protected]
https://github.com/solokeys/solo/commit/a9c02cd354f34b48195a342c7f524abdef5cbcecx_refsource_MISCThird Party Advisory
Source: [email protected]
https://www.aisec.fraunhofer.de/de/das-institut/wissenschaftliche-exzellenz/security-and-trust-in-open-source-security-tokens.htmlx_refsource_MISCExploitThird Party Advisory
Source: [email protected]
https://www.aisec.fraunhofer.de/en/FirmwareProtection.htmlCVSS
- Attack Vector
- PHYSICAL
- Complexity
- LOW
- Privileges
- NONE
- User Interaction
- NONE
- Scope
- UNCHANGED
- Confidentiality
- HIGH
- Integrity
- HIGH
- Availability
- HIGH
Vector?
Quick Info
StatusMODIFIED
CWE
CWE-326
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