CVE-2025-8645
📋 TL;DR
This CVE describes a command injection vulnerability in Kenwood DMX958XR firmware update process that allows physically present attackers to execute arbitrary code as root without authentication. The vulnerability affects Kenwood DMX958XR car multimedia systems with vulnerable firmware versions. Attackers can exploit this to gain complete control of the device.
💻 Affected Systems
- Kenwood DMX958XR
📦 What is this software?
Dmx958xr Firmware by Jvckenwood
⚠️ Risk & Real-World Impact
Worst Case
Attacker gains root access to the device, can install persistent malware, intercept vehicle data, manipulate audio/video systems, or use the device as a pivot point into connected vehicle networks.
Likely Case
Local attacker executes arbitrary commands to modify device settings, install unauthorized applications, or disrupt normal operation of the multimedia system.
If Mitigated
With physical security controls preventing unauthorized access to the device, impact is limited to authorized users who would need to deliberately exploit the vulnerability.
🎯 Exploit Status
Exploitation requires physical access to the device and knowledge of command injection techniques. No authentication bypass needed as vulnerability is in unauthenticated firmware update process.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Specific version not provided in available references; check Kenwood security advisory
Vendor Advisory: https://www.zerodayinitiative.com/advisories/ZDI-25-793/
Restart Required: No
Instructions:
1. Check Kenwood website for firmware updates. 2. Download latest firmware for DMX958XR. 3. Follow manufacturer's firmware update procedure via USB or authorized service center. 4. Verify update completes successfully.
🔧 Temporary Workarounds
Physical Access Control
allRestrict physical access to the vehicle and multimedia system to prevent unauthorized individuals from exploiting the vulnerability
Disable Unauthorized USB Ports
allIf possible, disable USB ports or restrict USB device usage to prevent unauthorized firmware update attempts
🧯 If You Can't Patch
- Implement strict physical security controls for vehicles containing vulnerable units
- Monitor for unauthorized device behavior or unexpected system modifications
🔍 How to Verify
Check if Vulnerable:
Check current firmware version against Kenwood's security advisory. If version is older than patched version, device is vulnerable.Check Version:
Navigate to Settings > System Information on the DMX958XR interface to view firmware versionVerify Fix Applied:
After firmware update, verify version matches or exceeds patched version specified in Kenwood advisory📡 Detection & Monitoring
Log Indicators:
- Unexpected firmware update attempts
- System command execution logs showing unusual commands
- Unauthorized process execution
Network Indicators:
- Unusual network activity from vehicle multimedia system if connected to Wi-Fi/Cellular
SIEM Query:
Not applicable - primarily physical access based attack with limited network telemetry