CVE-2025-8638
📋 TL;DR
This vulnerability allows physically present attackers to execute arbitrary code with root privileges on Kenwood DMX958XR car multimedia systems by exploiting command injection during firmware updates. Attackers can gain complete control of the device without authentication. Only users of the specific Kenwood car stereo model are affected.
💻 Affected Systems
- Kenwood DMX958XR
📦 What is this software?
Dmx958xr Firmware by Jvckenwood
⚠️ Risk & Real-World Impact
Worst Case
Attacker gains full root access to the car multimedia system, potentially compromising connected devices, stealing personal data, or using the system as an entry point to other vehicle systems.
Likely Case
Local attacker in physical proximity executes malicious code to modify system behavior, install malware, or disrupt normal operation of the car stereo.
If Mitigated
With physical security controls preventing unauthorized access to the vehicle, the vulnerability cannot be exploited.
🎯 Exploit Status
Exploitation requires physical access to the device and knowledge of command injection techniques. No authentication is required.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check Kenwood support for latest firmware
Vendor Advisory: https://www.kenwood.com/usa/support/
Restart Required: Yes
Instructions:
1. Visit Kenwood support website. 2. Download latest firmware for DMX958XR. 3. Copy firmware to USB drive. 4. Insert USB into car stereo. 5. Follow on-screen update instructions. 6. Restart device after update completes.
🔧 Temporary Workarounds
Physical Security Controls
allPrevent unauthorized physical access to the vehicle where the stereo is installed
Disable USB Port
allPhysically block or disable USB ports to prevent firmware update attempts
🧯 If You Can't Patch
- Implement strict physical security measures for vehicles
- Disconnect or physically secure USB ports on the device
🔍 How to Verify
Check if Vulnerable:
Check firmware version in device settings menu. If version is older than the patched version, device is vulnerable.Check Version:
Navigate to Settings > System Information > Firmware Version on the deviceVerify Fix Applied:
After updating firmware, verify the version number matches the latest patched version from Kenwood's website.📡 Detection & Monitoring
Log Indicators:
- Unusual firmware update attempts
- Unexpected system command execution
- USB device insertion logs
Network Indicators:
- No network indicators - physical access required
SIEM Query:
Not applicable - physical access vulnerability