Auth bypass in Yubico Yubikey 5 Nfc
CVE-2020-15001
An information leak was discovered on Yubico YubiKey 5 NFC devices 5.0.0 to 5.2.6 and 5.3.0 to 5.3.1. The OTP application allows a user to set optional access codes on OTP slots. This access code is intended to prevent unauthorized changes to OTP configurations. The access code is not checked when updating NFC specific components of the OTP configurations. This may allow an attacker to access configured OTPs and passwords stored in slots that were not configured by the user to be read over NFC, despite a user having set an access code. (Users who have not set an access code, or who have not configured the OTP slots, are not impacted by this issue.)
Vulnerability class: Broken Access Control
EPSS: 0.006 (42.9th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N.
Affected products
- Yubico Yubikey_5_nfc
- Yubico Yubikey_5_nfc_firmware
- N/a — versions n/a
Weakness classification (CWE)
References
- cve@mitre.org (x_refsource_CONFIRM, Exploit, Mitigation, Vendor Advisory)
Frequently asked questions
- What is CVE-2020-15001?
- CVE-2020-15001 is a medium-severity vulnerability in Yubico Yubikey 5 Nfc, classified under Missing Authorization. CVSS score: 5.3/10. Published 2020-07-09.
- How severe is CVE-2020-15001?
- Medium severity. CVSS v3 base score is 5.3 out of 10.