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YubiKeys are vulnerable to cloning attacks thanks to newly discovered side channel
(arstechnica.com)
this post was submitted on 09 Sep 2024
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To be fair given some of the places and things YubiKeys protect, especially local government, finance, hospitals, and the like, this is one of the cases where a physical attack isn’t beyond the realm of possibility. I’m not cloning a Yubikey with specialized kit to break into a small business, but if it plus a password lets me log in as an accountant at an bank or investment firm on the target’s day off, well then it might be worth it for an attacker.
Yeah, I was thinking that when I wrote the comment, and aimed it at people working for a smaller company or using it in their personal life, I should have been clear on this.
All they would have to do to mitigate the threat is buy new keys. The vulnerability doesn't exist in their keys since May.