macOS < 10.14.3 / iOS < 12.1.3 - Sandbox Escapes due to Type Confusions and Memory Safety Issues in iohideventsystem

/ It's possible that this should be two separate issues but I'm filing it as one as I'm still understanding this service. com.apple.iohideventsystem is hosted in hidd on MacOS and backboardd on iOS. You can talk to it from the app sandbox on iOS. It uses an IOMIGMachPortCache to translate between...