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Give Me the Green Light Part 1: Hacking Traffic Control Systems
Adventures in Responsible Disclosure
Its primary function is to control the sequence of traffic lights (red, yellow, and green) to ensure the orderly and safe flow of vehicles and pedestrians. The correct way to do this write-up would be to start from the boring and mundane parts of acquiring hardware and figuring out how to power it on and get it running, but sometimes it’s okay to eat your dessert before dinner and get to the good stuff first. I’d love to write a long detailed blog about getting a root shell via UART or extracting the firmware via JTAG and then reversing it, but the honest truth is I found a vulnerability in the webapp in the first 15 minutes of having the unit online and it was the first thing I tried.
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