CVE-2025-8647
📋 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 in the firmware update process. Attackers can compromise the device without authentication, potentially gaining full control over the system. Only users of Kenwood DMX958XR devices are affected.
💻 Affected Systems
- Kenwood DMX958XR
📦 What is this software?
Dmx958xr Firmware by Jvckenwood
⚠️ Risk & Real-World Impact
Worst Case
Attacker gains complete root control of the device, can install persistent malware, intercept communications, manipulate audio/video systems, or use the device as a foothold into connected vehicle networks.
Likely Case
Local attacker in physical proximity (e.g., valet, service technician, thief) compromises the device to install malicious software, steal data, or disrupt functionality.
If Mitigated
With physical security controls preventing unauthorized access, impact is limited to authorized personnel who could still exploit the vulnerability.
🎯 Exploit Status
Exploitation requires physical access and knowledge of the firmware update process. No authentication needed. ZDI-CAN-26270 tracking number indicates coordinated disclosure.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check Kenwood support for latest firmware
Vendor Advisory: https://www.zerodayinitiative.com/advisories/ZDI-25-795/
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 device. 5. Navigate to Settings > System > Firmware Update. 6. Select update file and confirm installation. 7. Device will reboot automatically.
🔧 Temporary Workarounds
Disable physical access
allPrevent unauthorized physical access to the device by keeping vehicle locked and limiting who can interact with the multimedia system.
Disable firmware update feature
allIf possible, disable automatic or manual firmware updates through device settings to prevent exploitation via update process.
🧯 If You Can't Patch
- Implement strict physical security controls to prevent unauthorized access to the device
- Monitor for unusual device behavior or unexpected firmware update attempts
🔍 How to Verify
Check if Vulnerable:
Check firmware version in device settings (Settings > System > Information). If version is older than patched release, device is vulnerable.Check Version:
Navigate to Settings > System > Information on the device interfaceVerify Fix Applied:
After updating, verify firmware version matches latest patched version from Kenwood. Test that firmware update process still functions normally.📡 Detection & Monitoring
Log Indicators:
- Unexpected firmware update processes
- System command execution from update routines
- Unauthorized USB device connections
Network Indicators:
- None - purely local exploitation
SIEM Query:
Not applicable - no network exploitation vector