ST. LOUIS (CBS SF) — Two hackers were able to take remote control of a Jeep as a journalist drove at 70 mph on a St. Louis road, and Chrysler has quietly issued a software patch to fix the security flaw.

Wired reporter Andy Greenburg worked with the hackers to reveal the flaw in Chrysler’s Uconnect infotainment system, which allowed them to remotely hack the Jeep and take control of various systems like the stereo, windshield wipers, and even disconnect the engine from the gearbox.

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Greenburg wrote that he was a “willing subject on whom they (the hackers) could test the car-hacking technique-what the security industry calls a zero-day exploit-that can target Jeep Cherokees and give the attacker wireless control, via the internet, to any of thousands of vehicles.”

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Chrysler quietly issued a software update to “improve vehicle electronic security and communications system enhancements.”

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