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For someone who loves reading technical write ups like this, is there a guide on how to get to a point where I’m doing this kind of work full time? I work as a software engineer and do RE challenges in my down time but would love to get to a point like this - developing and researching hardware/middleware exploits. Is it just as simple “keep learning till you get noticed?”
The second research paper from the SEEMOO labs team demonstrated an attack to enable AWDL using Bluetooth low energy advertisements to force arbitrary devices in radio proximity to enable their AWDL interfaces for Airdrop. SEEMOO didn't publish their code for this attack so I decided to recreate it myself.
The title really doesn't convey the Herculean efforts of the author in figuring this all out. It was literally months of finding multiple exploits, chaining them together, and improving them, to get to the endgame.
The term "hacker" is thrown around way too easily today, but the author is a real hacker in the true sense of the word, and I salute him and bow before his abilities.
I'm not even half way yet, I'm like a quarter of the way in, but i love the 'By the way, here is what i though must be a bug but is actually an unfixed memory leak I encountered while figuring out where to drop the payload'
It's almost perfect apart from one crucial point; how can we free these allocations?
Through static reversing I couldn't find how these allocations would be free'd, so I wrote a dtrace script to help me find when those exact kalloc allocations were free'd. Running this dtrace script then running a test AWDL client sending SRDs I saw the allocation but never the free. Even disabling the AWDL interface, which should clean up most of the outstanding AWDL state, doesn't cause the allocation to be freed.
This is possibly a bug in my dtrace script, but there's another theory: I wrote another test client which allocated a huge number of SRDs. This allocated a substantial amount of memory, enough to be visible using zprint. And indeed, running that test client repeatedly then running zprint you can observe the inuse count of the target zone getting larger and larger. Disabling AWDL doesn't help, neither does waiting overnight. This looks like a pretty trivial memory leak.
It's monumental work.
> The second research paper from the SEEMOO labs team demonstrated an attack to enable AWDL using Bluetooth low energy advertisements to force arbitrary devices in radio proximity to enable their AWDL interfaces for Airdrop. **SEEMOO didn't publish their code for this attack so I decided to recreate it myself.**
NOTE: This specific issue was fixed before the launch of Privacy-Preserving Contact Tracing in iOS 13.5 in May 2020.
In this demo I remotely trigger an unauthenticated kernel memory corruption vulnerability which causes all iOS devices in radio-proximity to reboot, with no user interaction. Over the next 30'000 words I'll cover the entire process to go from this basic demo to successfully exploiting this vulnerability in order to run arbitrary code on any nearby iOS device and steal all the user data