IPhone SE, iPhone 6s suffer fast battery drain on iOS 11.4


But nearly immediately after this feature made it out to the public, a cybersecurity firm found a loophole (ElcomSoft via The Verge) that resets the counter that determines whether it's been an hour since you've locked the phone. The feature is created to lock an iPhone's or iPad's Lightning port after one hour of device inactivity, preventing the port from being used for anything except basic charging until a password is entered again. The restriction persists through reboots and even while trying to restore an iPhone using a firmware file via Recovery mode. In order to let the accessory connect, you have to unlock the iPhone with a passcode, Touch ID, or Face ID.

USB Restricted Mode is created to shut off access to data on an iPhone or iPad when new USB accessories are plugged into the Lightning port, as long as it's been more than an hour since you last unlocked your iPhone.

According to researchers at ElcomSoft, if a USB accessory is plugged into the phone before the one-hour time limit has elapsed, it will reset the counter.

However, ElcomSoft says that merely plugging in almost any device (not just ones that have previously been connected to that phone), such as Apple's Lightning to USB 3 Camera Adapter, will disable the timer. All iOS 11.4, 11.4.1 and iOS 12 users are recommended to downgrade to 11.4 beta 3 for jailbreak! The security measure turns off the data transfer capabilities of the Lightning port if the phone has been locked for more than an hour. "Apple already took care of the people who don't want the new feature, so we'd like to see some love for those of us who just can't have too much security", he said. Law enforcement and private companies could leverage the loophole and design new hardware to continue to crack passcodes through the Lightning port.

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Apple also today released security updates for.

Now, Apple should be testing iOS 12, watchOS 5, and tvOS 12 exclusively, as you shouldn't expect to see anymore iOS 11 updates. With nothing more than a Lightning to USB 3 Camera Adapter - available to buy direct from Apple - you can prevent USB Restricted Mode from kicking in. The only way for Apple to now fix this flaw would be to require authentication of all iPhone accessories, but this likely won't happen anytime soon.

In the middle of writing this report, an additional update - iOS 11.4.1 - has been pushed out by Apple, though it's not clear whether this explicitly fixes the battery drain issue or not.