CVE-2018-18203 Code injection in n/a
An attacker with physical USB access can inject malicious firmware into Subaru StarLink head units, achieving root-level arbitrary code execution.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2018-18203?
CVE-2018-18203 is a medium-severity code injection vulnerability in n/a, published on 28 Nov 2018. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
A vulnerability in the update mechanism of Subaru StarLink Harman head units 2017, 2018, and 2019 may give an attacker (with physical access to the vehicle's USB ports) the ability to rewrite the firmware of the head unit. This occurs because the device accepts modified QNX6 filesystem images (as long as the attacker obtains access to certain Harman decryption/encryption code) as a consequence of a bug where unsigned images pass a validity check. An attacker could potentially install persistent malicious head unit firmware and execute arbitrary code as the root user.
Weakness: CWE-347
Which versions are affected by CVE-2018-18203?
It affects 3 products.
Products include Subaru Starlink 2017 Firmware, Subaru Starlink 2018 Firmware, Subaru Starlink 2019 Firmware.
How do I fix CVE-2018-18203?
No fix has been published for CVE-2018-18203 yet. Limit exposure of the affected software until one is available.
Upgrade, and never evaluate templates, expressions or code built from user input. More about Code injection.
Is CVE-2018-18203 being exploited?
There is no known exploitation of CVE-2018-18203 in the wild and no public exploit code.
Sources
Also known as GHSA-77mp-2cr5-w6pc.