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TI-2018-12876 Aliases CVE-2018-18203GHSA-77mp-2cr5-w6pc

A vulnerability in the update mechanism of Subaru StarLink Harman head units 2017, 2018…

Priority LOW 28CWE-347Published · Updated

Key facts

Attack vector
Physical
Privileges required
None
User interaction
None
Attack complexity
High
Impact type
Security bypass
Confidentiality · integrity · availability
High · High · High
Fix status
No fix listed

Attack profile from CVSS 3.0 · NVD. Fix status from CNA. Impact type from CWE-347.

Summary

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.

Why it matters now

EPSS 0.00241 15th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
——all versions—No fix listedCNA
  • — Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 6

CPEVersionsRoleVendor
cpe:2.3:o:subaru:starlink_2017_firmware:-:*:*:*:*:*:*:*not specified by NVDVulnerableSubaru
cpe:2.3:h:subaru:starlink_2017:-:*:*:*:*:*:*:*not specified by NVDRunning onSubaru
cpe:2.3:o:subaru:starlink_2018_firmware:-:*:*:*:*:*:*:*not specified by NVDVulnerableSubaru
cpe:2.3:h:subaru:starlink_2018:-:*:*:*:*:*:*:*not specified by NVDRunning onSubaru
cpe:2.3:o:subaru:starlink_2019_firmware:-:*:*:*:*:*:*:*not specified by NVDVulnerableSubaru
cpe:2.3:h:subaru:starlink_2019:-:*:*:*:*:*:*:*not specified by NVDRunning onSubaru
  • cpe:2.3:o:subaru:starlink_2017_firmware:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Subaru
  • cpe:2.3:h:subaru:starlink_2017:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Subaru
  • cpe:2.3:o:subaru:starlink_2018_firmware:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Subaru
  • cpe:2.3:h:subaru:starlink_2018:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Subaru
  • cpe:2.3:o:subaru:starlink_2019_firmware:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Subaru
  • cpe:2.3:h:subaru:starlink_2019:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Subaru

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2018-18203
  2. 2026-10-03 Alias added: GHSA-77mp-2cr5-w6pc

References

Exploit 1

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences