Older YubiKeys compromised by unpatchable 2FA bug — side-channel attack is critical, but expensive and difficult to execute

Many two-factor authentication keys from Yubico have become vulnerable to a side-channel attack resulting in cloning 2FA keys, due to a weakness with integrated Infineon security chips. 

Many two-factor authentication keys from Yubico have become vulnerable to a side-channel attack resulting in cloning 2FA keys, due to a weakness with integrated Infineon security chips.