Star-V Lab security researchers have discovered a vulnerability in Honda key fobs that allow hackers to unlock and start the engines of cars.
noted by the researchers
, this kind of attack should be prevented by the vehicle's rolling codes mechanism — a system introduced to prevent replay attacks by providing a new code for each authentication of a remote keyless entry. Vehicles have a counter that checks the chronology of the generated codes, increasing the count when it receives a new code.
Kevin2600 and Wesley Li found that the counter in Honda vehicles is resynchronized when the car vehicle gets lock and unlock commands in a consecutive sequence, causing the car to accept codes from previous sessions that should have been invalidated.By sending the commands in a consecutive sequence to the Honda vehicles, it will be resynchronizing the counter,” the researchers write. “Once counter resynced, commands from the previous cycle of the counter worked again.
The researchers say they tested their attack on several Honda models, including the Honda Civic 2012, Honda Accord2022, but warn that the security vulnerability could affect"all Honda vehicles currently existing on the market" and may also affect other manufacturers’ cars. The security researchers say they attempted to contact Honda about the vulnerability but found that the company “does not have a department to deal with security-related issues for their products.” As such, they reported the issue to Honda customer service but have not yet received a response.
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