Apple yesterday rolled out two-step verification, a security measure that promises to further shield Apple ID and iCloud accounts from being hijacked. Unfortunately, today a new exploit has been discovered that affects all customers who haven't yet enabled the new feature. It allows anyone with your email address and date of birth to reset your password — using Apple's own tools. We've been made aware of a step-by-step tutorial (which remains available as of this writing) that explains in detail how to take advantage of the vulnerability. The exploit involves pasting in a modified URL while answering the DOB security question on Apple's iForgot page. It's a process just about anyone could manage, and The Verge has confirmed the glaring security hole firsthand. Out of security concerns, we will not be linking to the website in question.
Needless to say, if you haven't enabled two-step verification for your Apple account, we urge you to waste no time in doing so. Unfortunately for those outside of the US, UK, Australia, Ireland, and New Zealand, the new security measure isn't even available to you yet. Those eligible can start the process here. Apple has also set up an FAQ page for any questions you may have. We've reached out to the company and will keep you posted as we hear more.
Update: We've had a little more time to explore the hack and have yet more bad news to report. Yesterday a number of users were told they'd need to wait three days before enabling two-step verification. As a result, these accounts are fully vulnerable to the exploit. As of right now, the only surefire way these individuals can avoid the security threat is by changing their birthdate through Apple's account settings page. This option is located at the bottom of "Password and Security."
Update 2: Apple's password reset tool is currently unavailable "due to maintenance," a strong indicator that the company is working to patch up the security blunder. We're still awaiting further details on the situation and will report back when we hear more.
Update 3: Apple has now confirmed the exploit and says it's "working on a fix."
Update 4: Apple's password reset tool is back online, and it appears the vulnerability has been fixed.