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Researcher Exhibits How Tesla Key Card Characteristic Can Be Abused to Steal Automobiles

By Eduard Kovacs on June 13, 2022

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A researcher has proven how a key card characteristic launched by Tesla final yr may very well be abused so as to add an unauthorized key that enables an attacker to open and begin a car.

The analysis was performed by Martin Herfurt, an Austria-based member of the Trifinite analysis group, which focuses on Bluetooth safety.

Herfurt’s evaluation focused a change made by Tesla in August 2021 to key card entry, eradicating the requirement for customers to put the important thing card on the central console after utilizing it to open the car.

The researcher discovered that when a Tesla is unlocked utilizing the important thing card through NFC, there’s a 130-second window when an attacker who’s inside Bluetooth vary of the focused car can add their very own key, which they will later use to unlock and drive the automotive.

The assault includes abusing Tesla’s VCSEC protocol, which handles communications between the automotive, the telephone app and the important thing fob. Throughout such an assault, the infotainment system doesn’t notify the sufferer in any approach {that a} new key has been added.

Herfurt has made a video to point out how this “authorization timer assault” works:

The researcher instructed SecurityWeek that he examined the assault towards Tesla Mannequin three and Mannequin Y, however he believes it also needs to work towards the newer Mannequin S and Mannequin X.

An exploit concentrating on Tesla’s infotainment system earned researchers $75,000 on the latest Pwn2Own 2022 hacking competitors. Herfurt additionally wished to show his assault at Pwn2Own, however relay assaults weren’t accepted. In truth, he mentioned he found the authorization timer assault vector in September 2021, however was saving it for Pwn2Own earlier than discovering out it was not in scope.

The researcher mentioned he didn’t inform Tesla about his newest analysis earlier than disclosing it as a result of he believed the carmaker needed to know in regards to the problem. Following his disclosure, he received affirmation that Tesla knew in regards to the vulnerability from others who reported a really related problem to the corporate months in the past.

In keeping with the researcher, Tesla recommends the usage of the PIN2Drive characteristic, which requires customers to enter a PIN earlier than they will drive off, however final week he printed a video displaying that an attacker can bypass PIN2Drive.

Tesla has not responded to a request for remark.

Herfurt is creating TeslaKee, an upcoming cell utility that may allegedly shield Tesla autos towards a majority of these relay assaults.

In Could, Herfurt confirmed one other methodology that may very well be used to steal a Tesla. The approach concerned a Bluetooth relay assault the place the attacker used two Raspberry Pi units to relay the radio sign between the Cellphone Key and a automotive over a protracted distance.

The assault depends on two people: one standing subsequent to the focused automotive, and one standing subsequent to the sufferer whereas they’re at a distance from their car. Every attacker has a Raspberry Pi and the 2 units are linked to one another, making a channel that permits the sufferer’s Cellphone Key to speak with the automotive over a protracted distance.

A really related Bluetooth-based assault towards Tesla automobiles — one which concerned the usage of specialised {hardware} as a substitute of Raspberry Pi computer systems — was introduced just lately by the NCC Group. The cybersecurity agency famous that the relay assault software it developed can be utilized towards any system speaking over BLE.

Associated: Tesla Automotive Hacked Remotely From Drone through Zero-Click on Exploit

Associated: Researchers Present Tesla Mannequin X Can Be Stolen in Minutes

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