Wired: GM Took 5 Years To Fix Full-Takeover OnStar Attack

"...when [a] group of researchers quietly pulled off [a remote hack] five years earlier, their work was answered with [no recall or immediate fix]. That’s in part because the ... group of car hackers, researchers at the University of California at San Diego and the University of Washington, chose not to publicly name the make and model of the vehicle they tested, which has since been revealed to be General Motors’ 2009 Chevy Impala. They also discreetly shared their exploit code only with GM itself rather than publish it."

https://www.wired.com/2015/09/gm-took-5-years-fix-full-takeover-hack-millions-onstar-cars/