Source code for a key component of the iPhone’s operating system was posted on GitHub. It is for the iOS 9.3 version of iBoot, this is responsible for the booting of the OS. A user going by the handle ‘ZioShiba’ posted the code, the code has been found to be legitimate and after Apple filed a copyright takedown request, the code has been removed.
Hackers could use the code to locate flaws or buts that could allw them to crack or decrypt the phone. They could also use the information to mimic iOS on non-Apple devices.