CVE-2020-15001

EUVD-2020-7131

09.07.2020, 19:15

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.)

Provider	Type	Base Score	Atk. Vector	Atk. Complexity	Priv. Required	Vector
NIST	Primary	5.3 MEDIUM	ADJACENT_NETWORK	HIGH	NONE	CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

Base Score

CVSS 3.x

EPSS Score

Percentile: 24%

Affected Products (NVD)

Vendor	Product	Version
yubico	yubikey_5_nfc_firmware	5.0.0 ≤ 𝑥 ≤ 5.2.6
yubico	yubikey_5_nfc_firmware	5.3.0 ≤ 𝑥 ≤ 5.3.1

𝑥

= Vulnerable software versions

Known Exploits!

Common Weakness Enumeration

CWE-862 - Missing Authorization
The software does not perform an authorization check when an actor attempts to access a resource or perform an action.

References

https://www.yubico.com/support/security-advisories/ysa-2020-04/