Symbolic Link Vulnerability

By restoring files, directories and symlinks to the iOS device, the path is carefully checked, so that no write accesses outside of certain domains are possible. By creating a symlink that points to somewhere else, it is possible to overcome this limitation.

Usage in evasi0n jailbreak
In the case of evasi0n, the following files, directories and symlinks are restored, all in the Media Domain:
 * directory:
 * directory:
 * symlink:  pointing to
 * directory:
 * several files in,  ,  ,  ,  ,  ,
 * file:

This results in the following directory and file structure: /var/mobile/Media/Recordings/ (folder) /var/mobile/Media/Recordings/.haxx (symlink) /var/mobile/DemoApp.app/Info.plist /var/mobile/DemoApp.app/DemoApp /var/mobile/DemoApp.app/Icon.png /var/mobile/DemoApp.app/Icon@2x.png /var/mobile/DemoApp.app/Icon-72.png /var/mobile/DemoApp.app/Icon-72@2x.png /var/mobile/Library/Caches/com.apple.mobile.installation.plist