CVE-2024-40427
📋 TL;DR
A stack buffer overflow vulnerability in PX4-Autopilot v1.14.3 allows attackers to execute arbitrary commands, potentially leading to denial of service or remote code execution. This affects users running vulnerable versions of the PX4 flight stack software for drones and autonomous vehicles.
💻 Affected Systems
- PX4-Autopilot
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution allowing complete system compromise, potential drone hijacking, or permanent system damage.
Likely Case
Denial of service causing drone/vehicle system crashes, flight termination, or loss of control.
If Mitigated
Limited impact with proper network segmentation and access controls, potentially only local denial of service.
🎯 Exploit Status
Exploitation requires sending specially crafted commands to vulnerable components. Buffer overflow manipulation needed for code execution.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Fixed in commit e03e0261a1a0c82f545e66a1e3795956c886db71 and later versions
Vendor Advisory: https://github.com/PX4/PX4-Autopilot/security/advisories/GHSA-55wq-2hgm-75m4
Restart Required: Yes
Instructions:
1. Update PX4-Autopilot to latest version or apply commit e03e0261a1a0c82f545e66a1e3795956c886db71
2. Rebuild and redeploy flight stack
3. Restart affected drone/vehicle systems
🔧 Temporary Workarounds
Network Segmentation
allIsolate drone/vehicle control networks from untrusted networks
Input Validation
allImplement additional input validation for PX4 command interfaces
🧯 If You Can't Patch
- Implement strict network access controls to limit who can communicate with PX4 systems
- Monitor for abnormal command patterns and implement rate limiting on command interfaces
🔍 How to Verify
Check if Vulnerable:
Check PX4 version: 'px4 --version' or examine build version in system logsCheck Version:
px4 --versionVerify Fix Applied:
Verify version is newer than v1.14.3 or includes commit e03e0261a1a0c82f545e66a1e3795956c886db71📡 Detection & Monitoring
Log Indicators:
- Stack overflow errors in PX4 logs
- Abnormal command sequences
- System crashes/restarts
Network Indicators:
- Unusual command traffic to PX4 ports
- Large payloads sent to command interfaces
SIEM Query:
source="px4.log" AND ("stack overflow" OR "buffer overflow" OR "segmentation fault")