Side-channel Vulnerability Exposes Risks in Legacy Yubikey Devices

Thursday, 5 September 2024, 11:49

Side-channel vulnerability has been found in legacy Yubikey firmware affecting models like YubiKey 5 Series and YubiHSM 2. This flaw raises concerns over device security. With the inclusion of fingerprint biometrics in YubiKey Bio, the impact of this discovery is significant and calls for urgent attention.
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Side-channel Vulnerability Exposes Risks in Legacy Yubikey Devices

Unveiling the Side-channel Vulnerability in Yubikey Firmware

A recent report highlights a critical side-channel vulnerability present in the firmware of legacy Yubikey devices. This vulnerability affects several models including the YubiKey 5 Series, Security Key Series, YubiHSM 2, and YubiKey Bio Series, which utilize fingerprint biometrics for user authentication.

Potential Implications for Users

Given the widespread use of these authentication devices, the presence of this vulnerability poses risks to user data and security. Users are strongly advised to assess their device versions and consider applying available updates promptly. The implications of this flaw extend beyond individual users, potentially affecting organizational data security as well.


This article was prepared using information from open sources in accordance with the principles of Ethical Policy. The editorial team is not responsible for absolute accuracy, as it relies on data from the sources referenced.


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