Apple iOS Passcode Crack Revealed by Security Researcher. Watch the Exploit in Action
26 June, 2018, 00:05
Apple has been in a fix recently where a security researcher claimed to have found a method to guess iPhone passcodes using bruteforce method despite the hard limits of iOS.
Hickeysaid that if an iPhone is plugged in and a hacker sends it passcode guesses using keyboard input, the tries triggers a risky interrupt request. Because this doesn't give the software any breaks, the keyboard input routine takes priority over the device's data-erasing feature, he explained.
One of the most prominent iPhone security features is the ability to set a limited number of passcode entry attempts to unlock the device. Also, after ten incorrect attempts to enter the correct passcode, the iPhone gets wiped and the information inside the device is lost forever. Hickey later tweeted saying that not all passcodes are sent to the secure enclave, which protects the device from a brute force attack.
The Secure enclave chip keeps a count of the number of times an incorrect passcode is entered and then progressively makes it more hard to enter a passcode. Hickeys says you should send your entries in one very long string of inputs instead of entering passcodes one at a time and waiting after each entry. But it appears to be effective, even against iOS devices running version 11.3 of the mobile operating system.
While Hickey's hack can work with six-digit passcodes, it is extremely long as it runs one passcode in about free to five seconds and takes about an hour to run over a hundred four-digit codes. In this way, the attacker could send a single access request but full of billions of passwords to try to unlock any type of device. Apple is introducing a new USB Restricted Mode with iOS 12 that will prevent use of the iPhone's USB connection if your iPhone hasn't been unlocked in the past hour.
That being said, Hickey has since followed up with an update in which he admits that maybe the hack would not have functioned as he had initially thought, so for now iOS users can rest assured that that particular hacking method is not possible.
But it was missed the mark, which is when you connect your iPhone to the computer and entering the code begins the automatic selection of password.
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