Illustration: Researcher gains root on Renault Latitude 2014 TomTom GPS
Unidade de navegação TomTok do Renault… · Public exploit code

Researcher gains root on Renault Latitude 2014 TomTom GPS

· 1 min read

Researcher Rasmus Moorats gained root on the TomTom navigation unit of his 2014 Renault Latitude, which runs Linux 2.6.28, using a path traversal bug in master.script on the SD card to point the kernel's crash handler at his own script; the goal was fixing the clock after daylight saving time ended. The flaw requires physical access to the vehicle and the driver tapping Yes on an "Execute master.script?" prompt. No fix has been disclosed in the sources.

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LowVulnerabilityPublic exploit codeFix unconfirmed
In this article
  1. What happened
  2. Why it matters
  3. What to do
  4. For the technical team
  5. Timeline
  6. Sources

What happened

A researcher gained root access on the TomTom navigation unit of his own 2014 Renault Latitude. His goal was fixing the car's clock, which the unit would not let him adjust after daylight saving time ended. The technique relied on a flaw in a file on the SD card.

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Why it matters

The case shows a vehicle head unit can be fully taken over through an SD card. On the affected model, risk is low: the flaw requires physical access to the car and the driver confirming a screen prompt. No fix has been disclosed.

What to do

No fix or mandatory action is indicated in the sources. If the fleet runs the 2014 Latitude, tell drivers to refuse unexpected script-execution prompts. Monitor Renault statements.

For the technical team

Affected
Unidade de navegação TomTok do Renault Latitude 2014 (Linux 2.6.28) · TomTom navigation unit in a 2014 Renault Latitude, running Linux 2.6.28 (researcher's report about his own car).
Exploitation
Working proof of concept by researcher Rasmus Moorats on his own vehicle, reported by @IntCyberDigest. No reports of malicious exploitation.
Fix
No fix disclosed in the sources.
Vector
Path traversal in master.script, a file on the unit's SD card. The researcher pointed the kernel's crash handler at his own script and deliberately crashed a program; the kernel ran the script as root. Exploitation requires physical access and the driver tapping Yes on an "Execute master.script?" prompt.
More details
Motive: the clock could not be adjusted after daylight saving time ended. The researcher said he did not even want the maps: "I just want to change the damn time."

Timeline

  1. Incident opened.

Sources 1 source

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