Comment by librick

Comment by librick

Thanks :) My friends and I have made a few jokes about hacking my literal "daily driver". TLDR; didn't excise, mostly sat in my car.

I originally rooted the car using Honda Hack via http://www.autohack.org/. A paid service that afaik uses a webkit exploit and probably an old Android kernel exploit to gain root. Part of the motivation for this project was to encourage others to release open-source rooting tools so they don't have to shell out the $25 for the "pro" version that I did.

Once I had root, I installed a few apps via a USB drive, including a file manager and a third-party app for ADB over TCP (I don't think 4.2.2 had built-in support for networked ADB). Then I connected my car to a Wi-Fi hotspot on my phone (at one point editing Android's wpa_supplicant.conf file directly because it got corrupted). Once I made sure that the headunit would autostart ADB over TCP and always try to connect to a certain Wi-Fi network, I had a decent safety net.

So I spent a good amount of time sitting in my car with a laptop after that though I was able to pull partitions via dd and do a lot of research sitting at my desk, especially static analysis of APKs, native libs, and binaries, stopping back at my car on occasion to grep gpio pins or sysfs values.

I didn't want to risk pulling the headunit from the car; that was (and is) an emergency fallback in case I ever wipe flash or something and need to reflash to the physical board. Fortunately I never had the need. I'd be great to get detailed pictures of the unit though. A quick eBay search shows headunits going for ~$1,000, which imo is ridiculous given that they're glorified Android tablets c. 2012. But if anyone has an extra they're looking to donate, definitely get in touch

Replies librick · 2023-05-24
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