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CVE-2020-12061

CRITICAL
9.8
CVSS Score
Published: May 21, 2021 at 11:03 AM UTC
Updated: June 17, 2026 at 02:51 AM UTC
2 products affected across 1 vendorFido U2F FirmwareFido U2F

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Severity
CRITICAL9.8
Exploit prediction
EPSS 2%

Description

An issue was discovered in Nitrokey FIDO U2F firmware through 1.1. Communication between the microcontroller and the secure element transmits credentials in plain. This allows an adversary to eavesdrop the communication and derive the secrets stored in the microcontroller. As a result, the attacker is able to arbitrarily manipulate the firmware of the microcontroller.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Fido U2F Firmware· Nitrokey
95%
v ≤ 1.1
nitrokey-fido-u2f (same device)
Fido U2F· Nitrokeydevice
80%
All versions

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (4)

x_refsource_MISCThird Party Advisory
Source: [email protected]
https://cwe.mitre.org/data/definitions/523.html
x_refsource_MISCExploitThird Party Advisory
Source: [email protected]
https://eprint.iacr.org/2021/640.pdf
x_refsource_MISCPatchThird Party Advisory
Source: [email protected]
https://github.com/Nitrokey/nitrokey-fido-u2f-firmware/commits/master
x_refsource_MISCThird Party Advisory
Source: [email protected]
https://github.com/Nitrokey/nitrokey-fido-u2f-firmware/releases

CVSS

9.8CRITICAL[email protected]
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-522

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