CVE-2024-39339 Overview
CVE-2024-39339 is an information disclosure vulnerability affecting all versions of Smartplay headunits used in Suzuki and Toyota vehicles. The flaw stems from an insecure storage of sensitive information weakness [CWE-922] that exposes diagnostic log traces, system logs, headunit passwords, and personally identifiable information (PII). An attacker reaching the affected system over the network can retrieve sensitive data without authentication or user interaction. The exposure threatens both user privacy and the integrity of the in-vehicle infotainment platform.
Critical Impact
Unauthenticated network-accessible information disclosure leaking headunit passwords, system logs, and PII from Smartplay infotainment systems deployed across Suzuki and Toyota vehicles.
Affected Products
- Smartplay headunits (all versions) deployed in Suzuki vehicles
- Smartplay headunits (all versions) deployed in Toyota vehicles
- Associated diagnostic and logging subsystems on the affected infotainment platform
Discovery Timeline
- 2024-09-18 - CVE-2024-39339 published to the National Vulnerability Database (NVD)
- 2026-06-17 - Last updated in NVD database
Technical Details for CVE-2024-39339
Vulnerability Analysis
The vulnerability resides in the storage and exposure mechanisms of the Smartplay headunit platform. Sensitive artifacts including diagnostic log traces, system logs, credentials, and PII are stored in a location reachable over the network without adequate access controls. An unauthenticated remote attacker can request these artifacts and read them in plaintext. The flaw is categorized under [CWE-922] Insecure Storage of Sensitive Information, indicating that the data is held without appropriate confidentiality protections. Successful retrieval enables follow-on attacks such as credential reuse against the headunit, reconnaissance of the vehicle subsystems, and privacy compromise of the driver and passengers. Because the issue affects all versions of the Smartplay headunit, the exposure scope spans both Suzuki and Toyota fleets that integrate this infotainment system.
Root Cause
The root cause is a misconfiguration in how the Smartplay headunit stores and serves sensitive data. Logs containing diagnostic traces, authentication material, and user data are accessible without authentication or authorization checks. The platform does not enforce confidentiality controls on data at rest or in transit between exposed services.
Attack Vector
The attack vector is network-based and requires no privileges or user interaction. An attacker on the same network as the headunit (for example, through an exposed wireless interface, paired interface, or in-vehicle network) can query the exposed endpoint and retrieve the leaked content directly. See the GitHub CVE-2024-39339 Analysis and the Google Document Overview for technical details. No verified public exploitation code is referenced in the NVD data.
Detection Methods for CVE-2024-39339
Indicators of Compromise
- Unexpected outbound or peer requests to headunit network services that return log, configuration, or credential content.
- Headunit log files showing repeated reads of diagnostic or system log endpoints from unknown clients.
- Evidence of stored headunit passwords being reused for authentication attempts against vehicle services.
Detection Strategies
- Inspect network captures from the vehicle environment for unauthenticated requests retrieving log, diagnostic, or configuration paths from the headunit.
- Review headunit service logs for access patterns that read sensitive files without prior authentication events.
- Correlate exposure of PII or credentials with subsequent authentication anomalies on associated vehicle or backend services.
Monitoring Recommendations
- Monitor the in-vehicle network for traffic to and from the infotainment unit and flag plaintext transfer of credentials or PII.
- Track firmware versions across affected Suzuki and Toyota fleets and alert when devices remain on unpatched Smartplay builds.
- Maintain an inventory of headunit network-exposed services and monitor for changes that increase the attack surface.
How to Mitigate CVE-2024-39339
Immediate Actions Required
- Restrict network access to the Smartplay headunit by disabling unused wireless and diagnostic interfaces when not required.
- Rotate any headunit credentials that may have been exposed through the leaked logs.
- Contact the vehicle manufacturer or authorized dealer to confirm availability of an updated infotainment firmware addressing CVE-2024-39339.
Patch Information
No vendor advisory or patch URL is referenced in the NVD record at the time of publication. Owners and fleet operators should track Suzuki and Toyota service bulletins for Smartplay headunit firmware updates and apply them through authorized service channels. Refer to the GitHub CVE-2024-39339 Analysis for additional technical context.
Workarounds
- Disable or restrict network-exposed diagnostic features on the headunit until a vendor fix is applied.
- Avoid pairing the headunit with untrusted Wi-Fi or Bluetooth networks that could allow an attacker to reach exposed services.
- Limit the storage of personal data such as contacts, call logs, and location history on the affected infotainment system.
# Configuration example
# Owners cannot directly patch the headunit firmware; reduce exposure with these operational steps:
# 1. Disable Wi-Fi hotspot/tethering on the headunit when not in use
# 2. Forget untrusted Bluetooth and Wi-Fi pairings
# 3. Remove stored PII (contacts, call history, navigation favorites) until firmware is updated
# 4. Request a firmware status check at the next authorized service appointment
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
