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It is with the arrival of iOS 11.4.1 that Apple has presented to the public its last security measure. The restricted USB mode is intended to ensure that it is impossible to unlock the iPhone or the iPad after their use.
If this is a good idea, it actually presents a serious security problem and prevents unlocking of restricted USB mode. The restricted mode of the iPhone is supposed to be Apple's answer to anyone who can unlock the iPhone with successive attempts to access it by blocking it. Lightning door after one hour stop.
Only with a new unlock with the user data this return can be used for data transmission, thus being only limited to the loading of the iPhone.
A team of researchers evaluated this new feature and discovered a very simple failure to exploit and reject the concept and mechanisms created by Apple. According to these researchers, something as simple as an external camera adapter from Lightning to USB, an official product of the company, is just as easy to use as an external Lightning camera adapter to USB.
Apple, to reset the counter.
We ran several tests and now we can confirm that the restricted USB mode is maintained by reboots and that the software restores continue in recovery mode. In other words, we have not found any obvious way to break the restricted USB mode when it is already turned on.
What we found is that iOS will reset the USB Restrict mode countdown even if you connect the iPhone to a USB accessory that has never been associated with the iPhone before (The accessories do not need to be paired). In other words, as soon as the police seize an iPhone, it will immediately connect this iPhone to a compatible USB accessory to avoid locking the restricted USB mode after one hour. Important, this only helps if the iPhone has not yet entered USB restricted mode.
With this little flaw, simple and seemingly harmless, Apple eventually blocks the restricted USB mode, rendering it unusable to protect any iPhone that has been grasped and accessed. 19659002] After this step, it will be easy to reuse equipment such as GrayShift or others, who knows how to unlock the iPhone without much effort. Probably, Apple will solve this problem very soon, but until then its protection is unachievable.
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