Vulnerability in Nitrokey Fido U2f
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.019 (78.3th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 78th percentile — 78.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.019 · newest: 0.019 · change: 0.000
Affected products
Weakness classification (CWE)
Public proof-of-concept exploits
References
- github.com/Nitrokey/nitrokey-fido-u2f-firmware/releases (Third Party Advisory)
- github.com/Nitrokey/nitrokey-fido-u2f-firmware/commits/master (Patch, Third Party Advisory)
- eprint.iacr.org/2021/640.pdf (Exploit, Third Party Advisory)
- cwe.mitre.org/data/definitions/523.html (Third Party Advisory)
Frequently asked questions
- What is CVE-2020-12061?
- CVE-2020-12061 is a critical-severity vulnerability in Nitrokey Fido U2f, classified under Insufficiently Protected Credentials. CVSS score: 9.8/10. Published 2021-05-21.
- How severe is CVE-2020-12061?
- Critical severity. CVSS v3 base score is 9.8 out of 10.
- Is CVE-2020-12061 known to be exploited?
- 3 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.