CVE-2025-67037 Overview
CVE-2025-67037 is a command injection vulnerability discovered in the Lantronix EDS5000 serial device server, specifically affecting version 2.1.0.0R3. An authenticated attacker can inject arbitrary operating system commands into the tunnel parameter when terminating a tunnel connection via the device's management interface. Successfully exploited commands execute with root privileges, allowing complete system compromise of the affected device.
Critical Impact
Authenticated attackers can achieve full root-level command execution on vulnerable Lantronix EDS5000 devices, potentially compromising industrial control systems and critical infrastructure where these serial device servers are deployed.
Affected Products
- Lantronix EDS5000 version 2.1.0.0R3
Discovery Timeline
- 2026-03-11 - CVE-2025-67037 published to NVD
- 2026-03-12 - Last updated in NVD database
Technical Details for CVE-2025-67037
Vulnerability Analysis
This vulnerability is classified as CWE-94 (Improper Control of Generation of Code), manifesting as an OS command injection flaw in the tunnel management functionality of the Lantronix EDS5000. The device fails to properly sanitize user-supplied input in the tunnel parameter before passing it to system shell commands. When an authenticated user attempts to terminate a tunnel connection, the parameter value is concatenated directly into a command string that is subsequently executed by the underlying operating system with root privileges.
The attack can be conducted remotely over the network and requires only low-privilege authentication to exploit. No user interaction is necessary beyond the initial authentication. A successful attack results in complete compromise of confidentiality, integrity, and availability of the affected device.
Root Cause
The root cause of this vulnerability lies in insufficient input validation and sanitization within the tunnel termination functionality. The application directly incorporates user-controlled input from the tunnel parameter into shell commands without proper escaping or validation, enabling command injection attacks. This represents a fundamental secure coding violation where untrusted input is passed to a privileged system interpreter.
Attack Vector
The attack is network-based, requiring the attacker to first authenticate to the EDS5000 device's management interface. Once authenticated, the attacker can craft a malicious request containing OS command sequences within the tunnel parameter. Common injection techniques include using shell metacharacters such as semicolons (;), pipes (|), or command substitution operators ($(...) or backticks) to chain additional commands. Because the injected commands execute with root privileges, the attacker gains complete control over the device, enabling actions such as:
- Installing persistent backdoors or malware
- Modifying device configuration to disrupt operations
- Pivoting to attack other systems on the network
- Exfiltrating sensitive configuration data and credentials
- Disrupting serial-to-network communications in industrial environments
Given the EDS5000's role as a serial device server commonly deployed in industrial control system (ICS) environments, successful exploitation could have significant operational technology (OT) security implications. CISA has issued an ICS advisory (ICSA-26-069-02) regarding this vulnerability.
Detection Methods for CVE-2025-67037
Indicators of Compromise
- Unusual process execution spawned from the EDS5000 web server or management processes
- Unexpected outbound network connections from the device to external IP addresses
- Modified system files or new files in temporary directories on the device
- Anomalous authentication attempts followed by tunnel termination requests containing special characters
Detection Strategies
- Monitor HTTP/HTTPS traffic to EDS5000 devices for requests to tunnel management endpoints containing shell metacharacters such as ;, |, &, $(), or backticks
- Implement network-based intrusion detection rules to identify command injection patterns in requests to serial device servers
- Review device logs for unusual administrative actions, particularly tunnel management operations from unexpected source IPs
- Deploy application-layer firewalls to inspect and filter malicious input patterns targeting management interfaces
Monitoring Recommendations
- Establish baseline behavior for EDS5000 management interface access and alert on deviations
- Implement centralized logging for all serial device server management activities
- Monitor for privilege escalation indicators and unauthorized configuration changes on industrial network segments
- Regularly audit authenticated sessions and access patterns to identify potentially compromised credentials
How to Mitigate CVE-2025-67037
Immediate Actions Required
- Restrict network access to EDS5000 management interfaces using firewalls and network segmentation
- Implement strong authentication controls and review all user accounts with access to the device
- Place EDS5000 devices behind VPNs or jump servers to limit exposure
- Monitor the Lantronix security page for firmware updates addressing this vulnerability
Patch Information
Consult the CISA ICS Advisory ICSA-26-069-02 and Lantronix security resources for official patch availability and installation guidance. Additionally, the EDS5000 resource page may contain updated firmware releases.
Workarounds
- Disable remote management access to the EDS5000 where operationally feasible, limiting configuration to local or console-based methods
- Implement network access control lists (ACLs) to restrict management interface access to trusted administrator IP addresses only
- Deploy a web application firewall (WAF) in front of the device to filter requests containing shell metacharacters
- Enable enhanced logging and monitoring to detect exploitation attempts while awaiting a vendor patch
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
