sandbox

It is apple's software based Hypervisor that was introduced in firmware 2.0 called sandbox

Problem's

• This made all App Store's apps need updating to work on the new iOS
• For app's to run they needed to have a folder called _Codesign in it was a file called CodeResources
• If a userland exploit was discovered in an App Store app the CodeResources would become invalid when a file was injected
• The checks are not as hard on app's in the firmware [[1]] (only version.plist is checked to prevent a soft_upgrade )

Exploit's

The dependency on the CodeResources file makes it vulnerable to the Incomplete Codesign Exploit