A mobile app for OnStar, General Motors’ vehicle communication system has a flaw which a researcher says can allow hackers to unlock cars and start engines remotely.
“White-hat” hacker Samy Kamkar posted a video on Thursday saying he had figured out a way to “locate, unlock and remote-start” vehicles by intercepting communications between the OnStar RemoteLink mobile app and the OnStar service.
Kamkar said he plans to provide technical details on the hack next week in Las Vegas at the Def Con conference, where tens of thousands of hacking aficionados will gather to learn about new cybersecurity vulnerabilities.
Kamkar released the video a week after Fiat Chrysler Automobiles recalled some 1.4 million vehicles after hacking experts demonstrated a more serious vulnerability in the Jeep Cherokee. That bug allowed them to gain remote control of a Jeep traveling at 70 miles per hour on a public highway.
OnStar Flaw Update “Days Away”
GM spokesman Terrence Rhadigan told Reuters via email that the company was preparing an update to the RemoteLink app that would address the vulnerability. “It’s days away,” Rhadigan said.
When asked via email if it was safe to use the app before an update is released, Rhadigan said: “We believe the chances of replicating this demonstration in the real world are unlikely. In addition, the action involves one user at a time, and would impact only that specific user’s account.”
The issue drew the attention of U.S. safety regulators from the National Highway Traffic Safety Administration.
Agency representatives discussed the issue with GM officials, who said the flaw could involve doors and engine start-stop but does not involve other critical safety systems, according to a person familiar with those discussions.
The agency responded by making some suggestions, including disabling the app’s function until customers perform the update, according to the person.
More than 3 million people have downloaded the OnStar RemoteLink mobile app for Apple iOS and Google Inc devices, according to OnStar’s website.
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