CVE-2024-38923 is a use-after-free vulnerability identified in the nav2_amcl process of Open Robotics' Robotic Operating System 2 (ROS2) and Nav2 humble versions. The vulnerability arises when an attacker remotely sends a specially crafted request to change the dynamic parameter `/amcl odom_frame_id`. This triggers a use-after-free condition, a type of memory corruption where the program continues to use memory after it has been freed, potentially leading to arbitrary code execution or data corruption. The vulnerability does not require any authentication or user interaction, making it remotely exploitable over the network with low attack complexity. The CVSS v3.1 score of 9.1 reflects critical severity, with high impact on confidentiality and integrity, though availability impact is not indicated. The vulnerability is classified under CWE-416 (Use After Free). No patches or exploits are currently publicly available, but the risk is significant due to the nature of ROS2’s deployment in robotics systems that may control physical devices. This vulnerability could allow attackers to manipulate robotic navigation or sensor data, potentially causing operational failures or unauthorized data access.

The impact of CVE-2024-38923 is substantial for organizations deploying ROS2 and Nav2 in robotics environments. Exploitation could lead to unauthorized disclosure or modification of sensitive navigation and sensor data, undermining the integrity and confidentiality of robotic operations. This could result in incorrect robot behavior, safety hazards, or disruption of automated processes in industrial, commercial, or research settings. Given the critical nature of robotics in manufacturing, logistics, healthcare, and defense, successful exploitation could cause operational downtime, financial loss, and safety incidents. The vulnerability’s remote exploitability without authentication increases the attack surface, especially if ROS2 systems are exposed to untrusted networks. Although no active exploits are known, the potential for weaponization by threat actors targeting robotics infrastructure is significant.

Organizations should immediately restrict network access to ROS2 and Nav2 services, especially the nav2_amcl process, using firewalls, VPNs, or network segmentation to limit exposure to untrusted sources. Monitoring and logging of parameter change requests should be implemented to detect suspicious activity targeting `/amcl odom_frame_id`. Until an official patch is released, consider disabling or restricting dynamic parameter updates if feasible. Employ runtime protections such as memory safety tools or sandboxing to mitigate exploitation impact. Maintain up-to-date inventories of ROS2 deployments and apply security best practices for robotic systems, including secure configuration and access controls. Engage with Open Robotics community channels for updates on patches or workarounds. Conduct penetration testing focused on parameter manipulation to identify potential exploitation paths. Finally, develop incident response plans specific to robotic system compromises.