CVE-2025-59736: Andsoft E-tms RCE Vulnerability

CVE-2025-59736 Overview

CVE-2025-59736 is a critical operating system command injection vulnerability affecting AndSoft's e-TMS version 25.03. This vulnerability enables an unauthenticated attacker to execute arbitrary operating system commands on the server by sending a specially crafted POST request containing malicious input through the m parameter in the /clt/LOGINFRM_DJO.ASP endpoint.

Critical Impact

Successful exploitation allows remote attackers to execute arbitrary commands on the underlying server without authentication, potentially leading to complete system compromise, data exfiltration, and lateral movement within the network.

Affected Products

• AndSoft e-TMS version 25.03
• Transportation Management System (TMS) deployments using vulnerable versions

Discovery Timeline

• October 2, 2025 - CVE-2025-59736 published to NVD
• October 2, 2025 - Last updated in NVD database

Technical Details for CVE-2025-59736

Vulnerability Analysis

This command injection vulnerability (CWE-77, CWE-78) exists in the login functionality of AndSoft's e-TMS web application. The vulnerable endpoint /clt/LOGINFRM_DJO.ASP fails to properly sanitize user-supplied input in the m parameter before passing it to operating system command execution functions.

The attack can be performed remotely over the network without requiring any authentication or user interaction. When exploited, an attacker gains the ability to execute commands with the same privileges as the web server process, potentially allowing full control over the affected system.

Root Cause

The root cause of this vulnerability is improper input validation and sanitization of the m parameter in the /clt/LOGINFRM_DJO.ASP endpoint. The application passes user-controlled input directly to system command execution functions without proper escaping or validation, allowing attackers to inject and execute arbitrary operating system commands.

Attack Vector

The attack is performed by sending a malicious POST request to the vulnerable endpoint. An attacker can append OS commands to the m parameter value using command separators (such as ;, |, &, or backticks depending on the underlying OS). Since no authentication is required, any network-accessible attacker can exploit this vulnerability remotely.

The vulnerable endpoint processes the m parameter in a way that concatenates user input into a command string that is subsequently executed by the server. This allows injection of additional commands that will be executed in the context of the web server process. For detailed technical information regarding exploitation techniques, refer to the INCIBE Security Notice.

Detection Methods for CVE-2025-59736

Indicators of Compromise

• Unusual POST requests to /clt/LOGINFRM_DJO.ASP containing shell metacharacters or command separators in the m parameter
• Web server logs showing requests with encoded command injection payloads (e.g., %7C, %26, %60)
• Unexpected child processes spawned by the web server process (IIS worker process or equivalent)
• Evidence of reconnaissance commands (whoami, hostname, ipconfig, netstat) in process execution logs

Detection Strategies

• Implement web application firewall (WAF) rules to detect and block command injection patterns in POST requests to /clt/LOGINFRM_DJO.ASP
• Monitor IIS or web server logs for suspicious requests containing shell metacharacters (|, ;, &, backticks) in parameter values
• Deploy endpoint detection and response (EDR) solutions to detect anomalous process creation from web server processes
• Configure SIEM rules to alert on multiple failed command injection attempts from the same source IP

Monitoring Recommendations

• Enable verbose logging on the e-TMS application and web server to capture full POST request bodies
• Monitor for outbound connections from the web server to unusual external hosts, which may indicate successful exploitation and command-and-control communication
• Track process creation events on servers hosting e-TMS, particularly looking for command shells or scripting engines spawned by the web server process

How to Mitigate CVE-2025-59736

Immediate Actions Required

• Restrict network access to the e-TMS application to trusted IP ranges only using firewall rules
• Implement web application firewall (WAF) rules to block requests containing command injection patterns in the m parameter
• Review web server and application logs for evidence of exploitation attempts
• Consider taking the vulnerable endpoint offline until a patch is available

Patch Information

Consult the INCIBE Security Notice for the latest information regarding patches and updates from AndSoft. Organizations should contact AndSoft directly for patch availability and apply updates as soon as they become available.

Workarounds

• Implement strict input validation at the web application firewall level to filter out command injection metacharacters from the m parameter
• Restrict access to the /clt/LOGINFRM_DJO.ASP endpoint using IP whitelisting or VPN requirements
• Deploy network segmentation to isolate the e-TMS server from critical infrastructure
• Enable enhanced monitoring and alerting on the affected system until a vendor patch is applied

# Example IIS URL Rewrite rule to block command injection attempts
# Add to web.config in the e-TMS application directory
# This blocks common command injection metacharacters in the 'm' parameter
# Note: This is a temporary workaround - apply vendor patches when available