Tuesday, 17 July, 2018


IOS 11.4.1 brings USB Restricted Mode but it has a bug

Enter your passcode tap switch to Off position Apple releases iOS 11.4.1 with USB Restricted Mode
Melba Vasquez | 10 July, 2018, 16:36

You can, however, find USB Restricted Mode under the Touch ID & Passcode section of the Settings app as "USB Accessories".

What ElcomSoft note is that any USB accessory can be plugged into the iOS device within the hour safe window, and this prevents the timeout from ever being reset.

Apple has released tvOS 11.4.1 for the Apple TV.

The team of researchers at ElcomSoft have reiterated that once the USB Restricted Mode is enabled, it restricts all the data communications that occur over the Lightning port. It also doesn't work if USB Restricted Mode has already been triggered (past the one-hour mark). The toggle is off by default, and that's how you'll want it in order to use the feature. The way it works is that when an hour has lapsed without the iPhone or iPad being unlocked with a passcode, the Lightning-USB connection will disable any data transfer.

USB Restricted Mode was most likely designed in response to hackers like Grayshift developing tools and methods to break into iOS devices.

The iOS 11.4.1 upgrade is small by Apple standards - coming in at around 200MB - but it represents a big headache for the Federal Bureau of Investigation and other organizations that want to gain access to someone else's phone because it kills off the most common route to bypassing the device's security. "Prior to iOS 11.4.1, isolating the iPhone inside a Faraday bag and connecting it to a battery pack would be enough to safely transport it to the lab", he concludes.

iOS 11.4.1 should improve the reliability of AirPods, along with syncing Mail, Contacts, and Noes with Exchange accounts. watchOS 4.3.2 and tvOS 11.4.1 should just have general fixes and improvements. However, this doesn't mean that the USB connectivity with an Apple device is entirely safe. The Grayshift boxes plug into the Lightning port and remove prolonged delays between PIN code attempts, allowing law enforcement (or criminals) to brute-force an unlock.

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