Moxa Service Missing Authentication for Critical Function

The lack of authentication in Moxa Service presents a severe risk. An attacker can leverage this vulnerability to execute arbitrary commands on the affected system without proper authorization. This could involve downloading sensitive configuration files containing credentials or other critical data, uploading malicious code to gain persistent access, or even taking complete control of the system. The potential impact extends beyond the immediate system, as compromised Moxa Service instances could be used as a springboard for lateral movement within the network, potentially impacting other connected devices and systems. The ability to execute arbitrary commands effectively grants the attacker root-level access, allowing for significant disruption and data theft.

Organizations utilizing Moxa Service for industrial automation, data acquisition, or remote device management are at significant risk. Specifically, deployments with limited network segmentation or those relying on default configurations are particularly vulnerable. Any environment where Moxa Service is exposed to untrusted networks should be considered at high risk.

• windows / other: Monitor process execution for unexpected commands originating from the Moxa Service. Use Sysinternals Process Monitor to track file access and registry modifications.

Get-Process -Name "MoxaService" | Select-Object -ExpandProperty Path

• linux / server: Monitor system logs (e.g., /var/log/syslog) for unusual command execution patterns associated with the Moxa Service. Use auditd to track command execution.

journalctl -u moxa-service -f

• generic web: Monitor network traffic for unusual outbound connections from the Moxa Service to external hosts. Examine access logs for suspicious requests targeting the Moxa Service endpoint.

1. 2024-10-14Disclosure

   disclosure

1. आरक्षित2024-09-24
2. प्रकाशित2024-10-14
3. संशोधित2025-09-19
4. EPSS अद्यतन2026-04-02

The primary mitigation for CVE-2024-9137 is to immediately upgrade Moxa Service to version 6.5.1 or later. If upgrading is not immediately feasible due to compatibility issues or downtime concerns, consider implementing temporary workarounds. Network segmentation can limit the potential blast radius by isolating the Moxa Service instance from other critical systems. Restrict network access to the Moxa Service to only authorized IP addresses. Monitor network traffic for suspicious command execution attempts. While a WAF or proxy cannot directly prevent the underlying vulnerability, it can potentially block known malicious command patterns. After upgrading, verify the fix by attempting to send commands to the Moxa Service without providing authentication credentials; the service should reject these requests.