CVE-2025-15499: Sangfor Operation System RCE Flaw

CVE-2025-15499 Overview

A critical OS command injection vulnerability has been identified in Sangfor Operation and Maintenance Management System up to version 3.0.8. This vulnerability exists in the uploadCN function within the VersionController.java file, where improper handling of the filename argument allows attackers to inject and execute arbitrary operating system commands. The attack can be initiated remotely by authenticated users, making this a significant security concern for organizations using this management platform.

Critical Impact

Remote attackers with low privileges can achieve complete system compromise through arbitrary OS command execution, potentially leading to data exfiltration, lateral movement, and full infrastructure takeover.

Affected Products

• Sangfor Operation and Maintenance Management System versions up to 3.0.8
• All deployments utilizing the vulnerable VersionController.java component
• Network-accessible instances of the management system

Discovery Timeline

• 2026-01-09 - CVE-2025-15499 published to NVD
• 2026-01-22 - Last updated in NVD database

Technical Details for CVE-2025-15499

Vulnerability Analysis

This vulnerability falls under CWE-77 (Improper Neutralization of Special Elements used in a Command) and CWE-78 (Improper Neutralization of Special Elements used in an OS Command). The uploadCN function in VersionController.java fails to properly sanitize or validate the filename parameter before incorporating it into system command execution. This allows an attacker to craft malicious filename values containing shell metacharacters or command sequences that are interpreted and executed by the underlying operating system.

The vulnerability is network-accessible, requiring only low-level authentication to exploit. No user interaction is required for successful exploitation, and the impact spans confidentiality, integrity, and availability of the affected system. The exploit has been publicly disclosed through security research channels, increasing the urgency for remediation.

Root Cause

The root cause of this vulnerability is insufficient input validation and sanitization in the uploadCN function. When processing the filename argument, the application directly passes user-controlled input to system command execution without proper escaping or validation of shell metacharacters such as semicolons (;), backticks (`), pipes (|), or command substitution sequences ($()). This implementation flaw allows arbitrary command injection through carefully crafted filename values.

Attack Vector

The attack vector is network-based, allowing remote exploitation through the management system's web interface. An attacker with low-privilege access to the system can submit a specially crafted request to the upload functionality with a malicious filename parameter. The injected commands execute with the privileges of the application server process, potentially providing access to sensitive system resources, configuration files, and the ability to pivot to other network systems.

Exploitation involves crafting HTTP requests to the vulnerable endpoint with filename parameters containing shell command sequences. For example, an attacker might submit a filename value that includes command separators and arbitrary system commands that execute when the filename is processed by the server-side Java code.

Detection Methods for CVE-2025-15499

Indicators of Compromise

• Unusual HTTP requests to upload endpoints containing shell metacharacters (;, |, `, $()) in filename parameters
• Unexpected child processes spawned by the Java application server process
• Suspicious command execution logs showing commands not typically associated with normal application operation
• Web application firewall (WAF) alerts for command injection patterns in request parameters

Detection Strategies

• Implement web application firewall rules to detect and block command injection patterns in HTTP request parameters
• Enable detailed logging for the VersionController.java component and monitor for anomalous filename patterns
• Deploy endpoint detection and response (EDR) solutions to identify suspicious process chains originating from the application server
• Configure SIEM rules to correlate web server access logs with system command execution events

Monitoring Recommendations

• Monitor application server processes for unexpected shell command execution or child process spawning
• Track file upload activities and validate filename patterns against expected naming conventions
• Implement network traffic analysis to identify potential exploitation attempts targeting the management system
• Review authentication logs for unusual access patterns preceding suspicious upload activities

How to Mitigate CVE-2025-15499

Immediate Actions Required

• Restrict network access to the Sangfor Operation and Maintenance Management System to trusted IP addresses only
• Implement web application firewall rules to block requests containing command injection patterns
• Review and strengthen authentication requirements for accessing the upload functionality
• Consider temporarily disabling the affected upload feature if operationally feasible until a patch is available

Patch Information

No vendor patch information is currently available. The vendor was contacted early about this disclosure but did not respond. Organizations should monitor VulDB Entry #340344 and the GitHub issue discussion for updates on vendor response and potential patches. Consider contacting Sangfor support directly to inquire about security updates for this vulnerability.

Workarounds

• Implement strict input validation on the server side to whitelist acceptable characters in filename parameters
• Deploy a web application firewall (WAF) with rules specifically blocking command injection payloads
• Restrict access to the management system using network segmentation and VPN requirements
• Run the application with minimal required privileges to limit the impact of successful exploitation

# Example WAF rule (ModSecurity) to block command injection in filename parameters
SecRule ARGS:filename "@rx [;|`$()]" "id:1001,phase:2,deny,status:403,log,msg:'Potential command injection in filename parameter'"

# Restrict network access using iptables
iptables -A INPUT -p tcp --dport 443 -s 10.0.0.0/8 -j ACCEPT
iptables -A INPUT -p tcp --dport 443 -j DROP