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Friday, March 31, 2023

Here’s How USB Restricted Mode in Ios 11.4.1 Could Be Easily Circumvented by Hackers

An oversight in the implementation of USB Restricted Mode in iOS 11.4.1 and the iOS 12 Beta 2 potentially allows malicious actors to override the new security feature intended to prevent unauthorized device access. According to a blog post by Oleg Afonin, a security researcher at Elcomsoft, plugging a device into the Lightning port before USB Restricted Mode is engaged interrupts the countdown timer.

As a quick review, USB Restricted Mode is a new feature that limits an iOS-powered device to only charge via USB if it has not been unlocked in the last hour. After one hour, the USB port cannot be used to communicate with a computer or other device. Similarly, this also affects the ability to use USB accessories on a given device. Apple’s support page on the topic indicates that iOS-powered devices will need to be unlocked in order for USB accessories plugged in to a given device to be recognized.

Starting with iOS 11.4.1, if you use USB accessories with your iPhone, iPad, or iPod touch, or if you connect your device to a Mac or PC, you might need to unlock your device for it to recognize and use the accessory. Your accessory then remains connected, even if your device is subsequently locked.

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