Jonathan Grynspan on Twitter: "@mjtsai It's worth noting that the machine must have already been booted past the grey FV2 login screen. But once it's running, hole ahoy!"

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Jonathan Grynspan ‏@grynspan 5 Aug 2012

@mjtsai I've determined there's a bug that leaves it stuck in the "on" position if you're not careful when enabling FileVault 2.
Michael Tsai ‏@mjtsai 5 Aug 2012

@grynspan Wow.
Jonathan Grynspan ‏@grynspan 5 Aug 2012

@mjtsai Sarcastic wow?
Michael Tsai ‏@mjtsai 5 Aug 2012

@grynspan Surprised wow. If it just says “A recovery key has been set” hopefully that means I didn’t share it with Apple…
Jonathan Grynspan ‏@grynspan 5 Aug 2012

@mjtsai It says that in the FV2 prefs, of course. But during login there's still the option to reset your PW with an Apple ID. Which is bad.
Michael Tsai ‏@mjtsai 5 Aug 2012

@grynspan So the only way to check whether Apple has your recovery key is to fail a login and see whether it offers to reset for you?
Jonathan Grynspan ‏@grynspan 5 Aug 2012

@mjtsai I can confirm I was able to log into an account on an FV2-protected disk with a password I didn't know using the Apple ID password.
Michael Tsai ‏@mjtsai 5 Aug 2012

@grynspan Is there anywhere in the UI that shows, after setup, whether your login password can be changed via Apple ID?
Jonathan Grynspan ‏@grynspan 5 Aug 2012

@mjtsai Physical access screws with a lot of security, but this defeats the purpose of FV2: prevent data access if physical access occurs.
Michael Tsai ‏@mjtsai 5 Aug 2012

@grynspan This sounds like the worst Mac security bug I’ve ever heard of. You’re basically basically that Apple has a backdoor to FileVault.

‏@grynspan

@mjtsai It's worth noting that the machine must have already been booted past the grey FV2 login screen. But once it's running, hole ahoy!

11:34 AM - 5 Aug 2012

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