The National Highway Traffic Safety Administration has opened an investigation into Harman car radios following a recent recall of 1.4 million Fiat Chrysler cars and trucks due to a hacking vulnerability.
Hackers got into a Jeep Cherokee SUV through an electronic opening in the radio and were able to take control of the car over the Internet. The vulnerability, exposed by two security experts and well-known hackers, was first disclosed in Wired magazine.
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In response, Fiat Chrysler said it sealed off a loophole in its internal cellular telephone network with vehicles to prevent similar attacks and issued a voluntary recall.
The NHTSA is investigating which other cars have the affected radios and whether they are vulnerable.