Security Flaws In Carmaker's Web Portal Let a Hacker Remotely Unlock Cars

Three years ago security researcher Eaton Zveare discovered a vulnerability in Jacuzzi's SmartTub interface allowing access to the personal data of every hot tub owner.

Now Zverae says flaws in an unnamed carmaker's dealership portal 'exposed the private information and vehicle data of its customers,' reports TechCrunch, 'and could have allowed hackers to remotely break into any of its customers' vehicles.'

Zveare, who works as a security researcher at software delivery company Harness, told TechCrunch the flaw he discovered allowed the creation of a ['national'] admin account that granted 'unfettered access' to the unnamed carmaker's centralized web portal. With this access, a malicious hacker could have viewed the personal and financial data of the carmaker's customers, tracked vehicles, and enrolled customers in features that allow owners — or the hackers — to control some of their cars' functions from anywhere.

Zveare said he doesn't plan on naming the vendor, but said it was a widely known automaker with several popular sub-brands.

In an interview with TechCrunch ahead of his talk at the Def Con security conference in Las Vegas on Sunday, Zveare said the bugs put a spotlight on the security of these dealership systems, which grant their employees and associates broad access to customer and vehicle information... The flaws were problematic because the buggy code loaded in the user's browser when opening the portal's login page, allowing the user — in this case, Zveare — to modify the code to bypass the login security checks. Zveare told TechCrunch that the carmaker found no evidence of past exploitation, suggesting he was the first to find it and report it to the carmaker.
When logged in, the account granted access to more than 1,000 of the carmakers' dealers across the United States, he told TechCrunch... With access to the portal, Zveare said it was also possible to pair any vehicle with a mobile account, which allows customers to remotely control some of their cars' functions from an app, such as unlocking their cars... 'The takeaway is that only two simple API vulnerabilities blasted the doors open, and it's always related to authentication,' said Zveare. 'If you're going to get those wrong, then everything just falls down.'

Zveare told TechCrunch the portals even included 'telematics systems that allowed the real-time location tracking of rental or courtesy cars...

'Zveare said the bugs took about a week to fix in February 2025 soon after his disclosure to the carmaker.'
Thanks to long-time Slashdot reader schwit1 for sharing the article.

Read more of this story at Slashdot.