CVE-2020-12061

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.

• CWE-522

• https://cwe.mitre.org/data/definitions/523.htmlThird Party Advisory
• https://eprint.iacr.org/2021/640.pdfExploit, Third Party Advisory
• https://github.com/Nitrokey/nitrokey-fido-u2f-firmware/commits/masterPatch, Third Party Advisory
• https://github.com/Nitrokey/nitrokey-fido-u2f-firmware/releasesThird Party Advisory
• https://cwe.mitre.org/data/definitions/523.htmlThird Party Advisory
• https://eprint.iacr.org/2021/640.pdfExploit, Third Party Advisory
• https://github.com/Nitrokey/nitrokey-fido-u2f-firmware/commits/masterPatch, Third Party Advisory
• https://github.com/Nitrokey/nitrokey-fido-u2f-firmware/releasesThird Party Advisory

Published

May 21, 2021

Last Modified

Jun 17, 2026

Status

Modified

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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