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Apple iOS/macOS - Sandbox Escape due to mach Message sent from Shared Memory

Multiple,dos,

发布于2022年11月4日2年前

io_hideventsystem sets up a shared memory event queue; at the end of this shared memory buffer it puts
a mach message which it sends whenever it wants to notify a client that there's data available
in the queue.

As a client we can modify this mach message such that the server (hidd on MacOS, backboardd on iOS)
will send us an arbitrary mach port from its namespace with an arbitrary disposition.

This is a minimal PoC to demonstrate the issue. Interpose it in to the PoC for P0 1623, Apple issue 695930632

Attaching two PoCS:
deja-xnu: exploit for this issue on iOS 11.4.1 to get code execution as backboardd, and then trigger p0  issue 1658 
dq8: exploit for this issue, and a new exploit for the original pangu variant of this issue to get a real tfp0 on iOS 7.1.2


Proof of Concept:
https://github.com/offensive-security/exploitdb-bin-sploits/raw/master/bin-sploits/45650.zip