CVE-2020-8539
📋 TL;DR
This vulnerability in Kia Motors vehicle head units allows attackers to execute unauthorized commands by exploiting the micomd daemon. Attackers can inject commands to generate CAN frames sent to the vehicle's Multimedia CAN bus, potentially affecting vehicle systems. Affects Kia vehicles with specific head unit software versions.
💻 Affected Systems
- Kia Motors Head Unit
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete vehicle compromise allowing control over multimedia systems, potential safety-critical functions via CAN bus manipulation, and vehicle theft or remote control.
Likely Case
Unauthorized access to vehicle multimedia systems, potential data theft from connected devices, and limited CAN bus manipulation affecting non-critical functions.
If Mitigated
Isolated compromise of entertainment system only, with no access to critical vehicle control systems due to proper network segmentation.
🎯 Exploit Status
Exploitation requires physical access to vehicle or access to vehicle's internal network. Public proof-of-concept demonstrates command injection via micomd daemon.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: No official vendor advisory found
Restart Required: No
Instructions:
Contact Kia Motors dealership for software updates. No documented patching process available.
🔧 Temporary Workarounds
Physical Security Controls
allRestrict physical access to vehicle and its diagnostic ports
Network Segmentation
allIsolate vehicle multimedia systems from critical control networks
🧯 If You Can't Patch
- Disable unnecessary vehicle connectivity features
- Implement strict physical access controls to vehicle diagnostic ports
🔍 How to Verify
Check if Vulnerable:
Check head unit software version in vehicle settings menu. If version matches affected versions, system is vulnerable.Check Version:
Check via vehicle head unit settings menu: Settings > System > Software InformationVerify Fix Applied:
Verify software version has been updated to a version not listed in affected versions.📡 Detection & Monitoring
Log Indicators:
- Unauthorized access attempts to micomd daemon
- Unusual CAN bus traffic patterns
- Unexpected command execution in head unit logs
Network Indicators:
- Unusual network traffic to/from vehicle head unit
- CAN bus frame anomalies
SIEM Query:
No standard SIEM query available for automotive systems