What are some interesting uses of WebUSB you have come across?

Re:What are some interesting uses of WebUSB you have come ac... by taviso on Sunday January 29, 2023 @06:52PM (#34574083)

The attack here was that if you get tricked into giving a phishing site your password and Web USB access to your U2F key and then you press your U2F key, then the attacker can bypass the 2FA. I highly doubt this ever happened in real life, it was just a proof of concept.

In my opinion, the Chrome team overreacted and blocked all WebUSB access to any U2F/HID device.

Now if you want to update the firmware or configure your key you need to download an .exe and run it instead, which seems unfortunate to me.

If the phisher had said "Your U2F firmware is out of date, please download and run this update to continue", would that have been a vulnerability? That could also bypass 2FA (or anything else, for that matter).

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Re:What are some interesting uses of WebUSB you have come ac... by ocdtrekkie on Sunday January 29, 2023 @08:39PM (#34574850)

That is a trivial phishing path. In fact, the phishing site could easily justify that process as being required for security! "We need access to your YubiKey to use it to sign you in" seems extremely plausible.

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Re:What are some interesting uses of WebUSB you have come ac... by taviso on Sunday January 29, 2023 @11:40PM (#34575824)

It's literally impossible, because U2F devices are not permitted with Web USB.

I personally think it's no more plausible than "Your USB firmware is outdated, please run this updated to continue logging in". Malicious sites do regularly pretend to require software updates and ask you to install them. That can still and does bypass U2F today, and actually happens in the wild.

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