CVE-2024-38925
📋 TL;DR
This CVE describes a use-after-free vulnerability in ROS2 Nav2's AMCL (Adaptive Monte Carlo Localization) component. Attackers can remotely trigger memory corruption by sending a request to change the dynamic parameter '/amcl z_max', potentially leading to arbitrary code execution. This affects ROS2 Humble distributions with Nav2 navigation stack.
💻 Affected Systems
- ROS2 (Robot Operating System 2)
- Nav2 (Navigation2)
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution leading to complete system compromise, privilege escalation, and potential lateral movement within robotic networks.
Likely Case
Service disruption, denial of service affecting robot localization, and potential memory corruption leading to crashes.
If Mitigated
Limited impact if proper network segmentation and access controls prevent unauthorized parameter modification requests.
🎯 Exploit Status
Exploitation requires understanding of ROS2 parameter service and memory corruption techniques, but no authentication is needed.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Fixed in navigation2 pull request #4397
Vendor Advisory: https://github.com/ros-navigation/navigation2/issues/4379
Restart Required: Yes
Instructions:
1. Update navigation2 package to version containing fix from PR #4397. 2. Rebuild affected packages. 3. Restart all ROS2 nodes and services.
🔧 Temporary Workarounds
Disable AMCL Parameter Modification
linuxRestrict access to AMCL parameter modification services
ros2 param set /amcl use_dynamic_parameters false
Configure ROS2 security to restrict parameter service access
Network Segmentation
allIsolate ROS2 network from untrusted systems
Configure firewall rules to restrict ROS2 port access (typically 11311 for ROS1, DDS ports for ROS2)
Implement VLAN segmentation for robotic systems
🧯 If You Can't Patch
- Implement strict network access controls to limit who can communicate with ROS2 nodes
- Deploy runtime protection mechanisms and monitor for abnormal parameter modification attempts
🔍 How to Verify
Check if Vulnerable:
Check if running ROS2 Humble with Nav2 AMCL component and verify version against known vulnerable commitsCheck Version:
ros2 pkg list | grep navigation2 && apt show ros-humble-navigation2Verify Fix Applied:
Verify navigation2 package includes commit from PR #4397 and test parameter modification functionality📡 Detection & Monitoring
Log Indicators:
- Unexpected parameter modification requests to /amcl z_max
- AMCL process crashes or abnormal termination
- Memory access violation errors in system logs
Network Indicators:
- Unusual ROS2 parameter service requests from unauthorized sources
- Traffic to ROS2/DDS ports from unexpected IP addresses
SIEM Query:
source="ros2_logs" AND (message="*z_max*" OR message="*amcl*" OR message="*segmentation fault*")