CVE-2023-34403
📋 TL;DR
This vulnerability in Mercedes-Benz NTG6 head units allows attackers with physical access to Ethernet pins to access the internal vehicle network. Through a race condition, they can spoof file paths and access arbitrary files via USB backup. This affects Mercedes-Benz vehicles equipped with NTG6 infotainment systems.
💻 Affected Systems
- Mercedes-Benz NTG6 Head Unit
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Attacker gains full control of vehicle infotainment system, potentially accessing sensitive user data, modifying system files, or establishing persistence for further attacks.
Likely Case
Local attacker with physical access extracts user data or modifies system configuration through USB backup manipulation.
If Mitigated
With proper physical security controls, risk is limited to authorized service personnel only.
🎯 Exploit Status
Requires physical disassembly of head unit to access Ethernet pins and knowledge of race condition timing.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown specific version - check with Mercedes-Benz dealer
Vendor Advisory: Not publicly available
Restart Required: Yes
Instructions:
1. Contact authorized Mercedes-Benz dealer. 2. Request NTG6 head unit software update. 3. Allow dealer to perform update procedure. 4. Verify update completion with dealer.
🔧 Temporary Workarounds
Physical Access Control
allRestrict physical access to vehicle interior and head unit components
USB Port Disable
allDisable USB backup functionality if not required
🧯 If You Can't Patch
- Implement strict physical security controls for vehicle access
- Disable or restrict USB functionality through system settings
🔍 How to Verify
Check if Vulnerable:
Check head unit model and software version with authorized dealer diagnostic toolsCheck Version:
Requires Mercedes-Benz diagnostic system - not user accessibleVerify Fix Applied:
Confirm with dealer that latest NTG6 software update has been applied📡 Detection & Monitoring
Log Indicators:
- Unusual USB backup activity
- File system access anomalies
Network Indicators:
- Unexpected Ethernet traffic from head unit
SIEM Query:
Not applicable - proprietary automotive system