Comment by Retr0id
1 day ago
If you're prepared to get out a soldering iron and/or chip-clip, you can usually back up and restore whatever IC stores the firmware you're modifying, giving you a recovery path.
> we also need good glitching tools
There are a lot already, what do you feel is missing?
What about automotive? I suspect automotive firmwares to be more protected already, but where do I start with playing with the infotainment systems?
How should I learn more about how to do it, what to buy, etc ? I haven't found ChatGPT to be a good teacher about this topic, and in particular re glitching, AI will refuse to discuss specifics
I have enough basic soldering to get UART attached, but not sure what to try after that.
Equipment-wise, I currently just have a few ESP32-C3s and electronics basics kit and some basic soldering stuff.
I flashed coreboot on an x220 once [0], and I think that can give you a good overall idea of how backing up and reprogramming an SPI memory works. From that you could do your own research checking the ICs in your hardware, and extrapolating to the correct tools you will need to read/write the chip you have in mind.
[0] https://stoisavljevic.com/articles/coreboot
ch341a programmer with a clip attachment. That's basically it. A 10 USD investment. No soldering unless flash chip is SMD.
Please make sure you fix the 3.3 V output if you get that device. Most revisions have a PCB layout issue that will output 5V even in 3.3 V, which has bricked stuff before. There are many ways to fix it, one trace cut and one jumper is how I did it.
https://libreboot.org/docs/install/spi.html#do-not-buy-ch341...
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There are plenty of pre-2023 resources out there, especially conference talks. But, Claude has no issues discussing glitching if you have CVP.
I guess this is a fine reply but just seeing your earlier comment, mentioning there are tons of glitching tools out there, I would've hoped to hear about some specifics here. Just my 2c
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