#VU96776 Observable discrepancy in Yubico products
Published: September 4, 2024
Vulnerability identifier: #VU96776
Vulnerability risk: Low
CVSSv4.0: CVSS:4.0/AV:P/AC:L/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: N/A
CWE-ID: CWE-203
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerable software:
YubiKey 5 Series
Security Key Series
YubiKey Bio Series
YubiHSM
YubiKey 5 Series
Security Key Series
YubiKey Bio Series
YubiHSM
Software vendor:
Yubico
Yubico
Description
The vulnerability allows an attacker to recover an ECDSA private key.
The vulnerability exists due to observable discrepancy within the Infineon’s cryptographic library used by the YubiKey 5 Series and Security Key Series firmware. An attacker with physical access to the token can perform a side-channel attack to recover the ECDSA private key and compromise the hardware token.
Remediation
Install updates from vendor's website.