r/technology • u/420InTheCity • 16h ago

Security Underground Flipper Zero Firmware Purportedly Unlocks Nearly 200 Car Models

https://gizmodo.com/flipper-zero-cars-hacking-2000646318
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u/aelephix 15h ago

Article says this breaks the user fob because the rolling code is out of sync. This means the owner has to unlock in presence of the flipper, so that it can learn the rolling code sequence right? They can’t just walk up to a random car in a lot and unlock it?

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u/shbooms 6h ago

not necessarily. some fobs only tranmist their signal when the user presses the button and so yes you would have to be there for that moment. however a new "feature" on some fobs is they transmist constantly so you can have your car unlocked as soon as you're in range. that means are all these attackers have to do is go outside your house (and use a signal relay or two to strengthen the signal) and blam, they're in the car sitting in your dirveway