DER Entitlements: The (Brief) Return of the Psychic Paper

Project Zero revisits Broadcom's Wi-Fi stack through Apple devices, mapping new attack surfaces and building toward a full over-the-air exploit chain against iPhones.

Research into auditing and exploiting Apple IPC, aiming to find at least one bug in each OS X/iOS IPC mechanism, starting with Distributed Objects as an underexplored attack surface.

A Google Project Zero rundown of sandbox escape and privilege escalation bugs in Mac OS X and iOS fixed by Apple in OS X 10.9.5 and iOS 8.

A step-by-step analysis of an in-the-wild iOS exploit that escapes Safari's WebContent process into the GPU process, covering the underlying bug and exploitation strategy.

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While doing research for the one-byte exploit technique, I considered several ways it might be possible to bypass Apple's Page Protection Layer (PPL) using just a physical address mapping primitive, that is, before obtaining kernel read/write or defeating PAC. Given that PPL is even more privileged than the rest of the XNU kernel, the idea of compromising PPL "before" XNU was appealing. In the end, though, I wasn't able to think of a way to break PPL using the physical mapping primitive alone.