Awesome

brokentooth

POC for CVE-2018-4327 (at least I think so since CVE-2018-4327 and CVE-2018-4330 were both discussed by @SparkZheng but it's not clear from him which one relates to which bug but since he described this one first I'm taking a guess).

Tested on iPhone 6S 11.3.1
Should work until 11.4

Let's you set the PC (ARM's version for IP register) to a value of your choice on SpringBoard and a few services. You need to run the code and then go to the BT settings and connect to a device. If it doesn't work turn the BT off and on.
Pretty annoying to exploit but I liked it so I wanted to make a POC and learn on the way.

Used @raniXCH bluetoothdPoC code to handle all the preparation of the Mach message and the sending of it to the BT service and adapted it to fit into this POC.
Used jtool to find the ordinal and other stuff.
Had to do a bit RE to find the correct message sizes.

credits: @SparkZheng - for his awesome lecture on DEFCON 26.
@raniXCH - for the excellent HITB presentation and the bluetoothdPoC.
Jonathan Levin - for the great book and jtool.

refrences: http://www.newosxbook.com/tools/jtool.html - jtool which I used in order to find the ordinal and other stuff.
https://www.weibo.com/ttarticle/p/show?id=2309404271293301154324 - @SparkZheng material.
https://github.com/rani-i/bluetoothdPoC - @raniXCH's POC code.
https://gsec.hitb.org/materials/sg2018/D2%20-%20The%20Road%20to%20iOS%20Sandbox%20Escape%20-%20Rani%20Idan.pdf - @raniXCH's material part 1.
https://blog.zimperium.com/cve-2018-4087-poc-escaping-sandbox-misleading-bluetoothd/ - @raniXCH's material part 2.