CVE-2024-44856
📋 TL;DR
CVE-2024-44856 is a NULL pointer dereference vulnerability in ROS2 navigation2's nav2_smac_planner component that can cause denial of service. This affects robotic systems using ROS2 navigation2 v.humble for autonomous navigation. Attackers could crash the navigation system, potentially disrupting robotic operations.
💻 Affected Systems
- ROS2 navigation2
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete navigation system crash leading to robotic system failure, potentially causing physical damage or safety hazards in autonomous vehicles or industrial robots.
Likely Case
Denial of service causing navigation system to crash, requiring manual restart and disrupting robotic operations temporarily.
If Mitigated
Navigation system crash with automatic recovery mechanisms or manual restart capability, causing temporary service disruption.
🎯 Exploit Status
Exploitation requires access to trigger the vulnerable planner component, typically through ROS2 topics/services. No authentication bypass required but requires ROS2 network access.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Fixed in navigation2 commit 4463 and later
Vendor Advisory: https://github.com/ros-navigation/navigation2/issues/4468
Restart Required: Yes
Instructions:
1. Update navigation2 package: 'sudo apt update && sudo apt upgrade ros-humble-navigation2' 2. Restart ROS2 nodes using navigation2 3. Verify fix by checking navigation2 version
🔧 Temporary Workarounds
Disable SMAC Planner
linuxSwitch to alternative path planners not using nav2_smac_planner component
Modify navigation2 configuration to use different planner (e.g., NavFn, Theta*)
Update planner parameter in nav2_params.yaml
🧯 If You Can't Patch
- Implement network segmentation to isolate ROS2 systems from untrusted networks
- Monitor for navigation2 process crashes and implement automatic restart mechanisms
🔍 How to Verify
Check if Vulnerable:
Check navigation2 version: 'apt list --installed | grep navigation2' and verify if pre-fix humble versionCheck Version:
ros2 pkg list | grep navigation2 && dpkg -l | grep navigation2Verify Fix Applied:
Verify navigation2 is updated to version containing commit 4463 fix📡 Detection & Monitoring
Log Indicators:
- Segmentation fault errors in ROS2 logs
- nav2_smac_planner process crashes
- Navigation system restart messages
Network Indicators:
- Unusual ROS2 topic traffic to planner components
- Navigation service timeouts
SIEM Query:
process.name="nav2_smac_planner" AND event.action="crash"