CVE-2024-52320: Command Injection RCE Vulnerability

CVE-2024-52320 Overview

CVE-2024-52320 is a critical command injection vulnerability affecting industrial network management devices. The vulnerability allows unauthenticated attackers to inject and execute arbitrary commands through specially crafted malicious HTTP requests, potentially resulting in complete remote code execution on the affected system.

Critical Impact

An unauthenticated remote attacker can achieve full system compromise through command injection via malicious HTTP requests, enabling arbitrary code execution without requiring any credentials or user interaction.

Affected Products

• Planet Technology Industrial Network Devices
• Firmware versions prior to v1.305b241111
• Network management and monitoring equipment

Discovery Timeline

• 2024-12-06 - CVE-2024-52320 published to NVD
• 2024-12-06 - Last updated in NVD database

Technical Details for CVE-2024-52320

Vulnerability Analysis

This command injection vulnerability (CWE-78: Improper Neutralization of Special Elements used in an OS Command) exists in the HTTP request handling mechanism of the affected industrial network devices. The vulnerability allows attackers to bypass authentication entirely and execute arbitrary operating system commands on the underlying system.

The attack requires network access to the device's management interface. Once exploited, an attacker gains the ability to execute commands with the privileges of the web server process, which often runs with elevated permissions on embedded industrial devices. This can lead to complete device compromise, persistent backdoor installation, lateral movement within industrial networks, and potential disruption of critical infrastructure operations.

Industrial control system (ICS) environments are particularly at risk, as these devices often manage critical network infrastructure and may have limited monitoring capabilities.

Root Cause

The root cause of CVE-2024-52320 is improper input validation and sanitization of user-supplied data in HTTP request parameters. The affected firmware fails to adequately neutralize special characters and command separators before passing user input to system shell functions. This allows attackers to break out of the intended command context and inject arbitrary operating system commands.

Command injection vulnerabilities of this type typically occur when web applications construct system commands by concatenating user input without proper escaping or validation, allowing metacharacters such as semicolons, pipes, or backticks to be interpreted as command separators.

Attack Vector

The attack is conducted remotely over the network by sending malicious HTTP requests to the device's web management interface. No authentication is required, making this vulnerability particularly dangerous in environments where the management interface is exposed to untrusted networks.

An attacker would craft HTTP requests containing command injection payloads embedded within vulnerable parameters. Common injection techniques include using shell metacharacters to chain commands or redirect output. The injected commands execute in the context of the web server process, potentially granting full control over the device.

Due to the network-based attack vector requiring no user interaction or authentication, exploitation can be automated and scaled across multiple vulnerable devices.

Detection Methods for CVE-2024-52320

Indicators of Compromise

• Unusual HTTP requests containing shell metacharacters (;, |, $(), backticks) in URL parameters or POST data
• Unexpected outbound network connections from industrial network devices
• Anomalous process spawning from web server processes on affected devices
• Unauthorized configuration changes or new user accounts on network management devices

Detection Strategies

• Deploy network intrusion detection systems (IDS) with signatures for command injection patterns in HTTP traffic
• Monitor HTTP access logs for suspicious requests containing shell metacharacters or encoded special characters
• Implement application-layer firewalls (WAF) to filter malicious payloads targeting management interfaces
• Establish behavioral baselines for network device activity and alert on deviations

Monitoring Recommendations

• Continuously monitor network traffic to and from industrial network management devices
• Enable verbose logging on affected devices and forward logs to a centralized SIEM
• Implement network segmentation to isolate management interfaces from untrusted networks
• Regularly audit device configurations and firmware versions against known vulnerable releases

How to Mitigate CVE-2024-52320

Immediate Actions Required

• Update affected devices to firmware version v1.305b241111 or later immediately
• Restrict network access to device management interfaces using firewall rules and network segmentation
• Place industrial network devices behind VPNs or jump hosts to limit exposure
• Review access logs for signs of exploitation attempts prior to patching

Patch Information

Planet Technology has released a security update to address this vulnerability. The patched firmware version v1.305b241111 is available through the Planet Download Support Portal. Organizations should prioritize applying this update to all affected devices.

For additional technical details and guidance, refer to the CISA ICS Advisory ICSA-24-340-02.

Workarounds

• Isolate affected devices from untrusted networks and the internet using network segmentation
• Implement strict access control lists (ACLs) to limit which IP addresses can reach the management interface
• Deploy a web application firewall (WAF) in front of the device to filter malicious HTTP requests
• Disable the web management interface if not operationally required and use alternative management methods

# Example: Network segmentation using iptables to restrict management access
# Allow management access only from trusted administrator subnet
iptables -A INPUT -p tcp --dport 80 -s 10.10.10.0/24 -j ACCEPT
iptables -A INPUT -p tcp --dport 443 -s 10.10.10.0/24 -j ACCEPT
iptables -A INPUT -p tcp --dport 80 -j DROP
iptables -A INPUT -p tcp --dport 443 -j DROP