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Sanity check: Yubikeys and password shares (reddthat.com)

submitted 2 months ago by Telorand@reddthat.com to c/cybersecurity@sh.itjust.works

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I've been thinking about getting a couple of Yubikeys for a partner and myself, but we share certain accounts. While I would love to have the Yubikey 5 that can store TOTP, that seems like it could be problematic for shared accounts.

Would using the cheaper Yubico Security Keys to unlock Bitwarden Premium vaults, that use a Shared Organization, be a better/more sane option than trying to sync up TOTP secrets every time a new shared account gets added? Any other critiques or suggestions?

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[–] Cort@lemmy.world 4 points 2 months ago (2 children)

You may already be aware, but a vulnerability has been recently documented on those.

https://lemmy.zip/post/22094344

[–] Telorand@reddthat.com 3 points 2 months ago

I'm aware. It doesn't affect Yubikeys with firmware v5.7 and above, which should be any keys bought in May onward (June to be safe).

I don't have one yet, so when I buy a key, it should be safe from that particular attack; I'll RMA it if it's the unpatched firmware version.

[–] WolfLink@sh.itjust.works 1 points 2 months ago

The attacker would need physical possession of the YubiKey, Security Key, or YubiHSM, knowledge of the accounts they want to target and specialized equipment to perform the necessary attack. Depending on the use case, the attacker may also require additional knowledge including username, PIN, account password, or authentication key.

Yeah that’s not a dealbreaker IMO