iOS 10.3.2 Userland Exploit Released [Video]

Security researcher Ian Beer has released a userland exploit for iOS 10.3.2. The exploit allows you to access the task pool for any process on the iPhone apart from the kernel.

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This is an exploit for CVE-2017-7047, a logic error in libxpc which allowed malicious message senders to send xpc_data objects that were backed by shared memory. Consumers of xpc messages did not seem to expect that the backing buffers of pc_data objects could be modified by the sender whilst being processed by the receiver.

This project exploits CVE-2017-7047 to build a proof-of-concept remote lldb debug server stub capable of attaching to and allowing the remote debugging all userspace processes on iOS 10.0 to 10.3.2.
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In the video below, Billy Ellis explains how to use the triple_fetch tool released by Beer.

"Currently this project only allows you to mess with user land processes such as backboardd, launchd, SpringBoard, etc & is DOES NOT provide a method of fully jailbreaking & patching the kernel and installing Cydia and other jailbroken packages onto the device."

Jonathan Levin, author of macOS and iOS Internals, recently said that the exploit can be adapted to a jailbreak. We'll let you know if that happens. If you are interested in jailbreaking, we'd advise you downgrade to iOS 10.3.2 before the signing window closes.

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Take a look at the video below!