CVE-2025-12916: Sangfor Security Management System RCE

CVE-2025-12916 Overview

A command injection vulnerability has been identified in Sangfor Operation and Maintenance Security Management System version 3.0. The vulnerability exists in the /fort/portal_login endpoint within the Frontend component, where improper handling of the loginUrl argument allows attackers to inject and execute arbitrary commands. This network-accessible vulnerability has been publicly disclosed, increasing the risk of exploitation in the wild.

Critical Impact

Remote attackers with low privileges can exploit this command injection vulnerability to execute arbitrary system commands on affected Sangfor Operation and Maintenance Security Management System installations, potentially leading to full system compromise.

Affected Products

• Sangfor Operation and Maintenance Security Management System 3.0
• Sangfor Operation and Maintenance Security Management System versions prior to 3.0.11
• Sangfor Operation and Maintenance Security Management System versions prior to 3.0.12

Discovery Timeline

• 2025-11-09 - CVE-2025-12916 published to NVD
• 2025-12-09 - Last updated in NVD database

Technical Details for CVE-2025-12916

Vulnerability Analysis

This vulnerability is classified as a command injection flaw (CWE-77) with an underlying injection vulnerability (CWE-74). The weakness resides in the /fort/portal_login file of the Frontend component, which fails to properly sanitize the loginUrl parameter before processing. When user-supplied input containing shell metacharacters or command sequences is passed to the loginUrl argument, the application executes these commands with the privileges of the web service process.

The attack requires network access and low-level authentication, making it remotely exploitable by authenticated users. The successful exploitation can lead to limited compromise of system confidentiality, integrity, and availability. The exploit has been publicly disclosed, which significantly increases the likelihood of active exploitation attempts.

Root Cause

The root cause of this vulnerability is insufficient input validation and sanitization of the loginUrl parameter in the /fort/portal_login endpoint. The application directly passes user-controlled input to system command execution functions without proper escaping or filtering of shell metacharacters. This allows specially crafted input to break out of the intended command context and execute arbitrary commands on the underlying operating system.

Attack Vector

The attack is network-based and targets the Frontend component's /fort/portal_login functionality. An attacker with low privileges can submit a malicious request containing command injection payloads in the loginUrl parameter. The payload could include command separators such as semicolons, pipes, or backticks to chain additional commands. Upon processing the malicious input, the server executes the injected commands, potentially allowing the attacker to read sensitive files, modify system configurations, establish persistence, or pivot to other systems on the network.

The vulnerability can be exploited by crafting a malicious HTTP request to the /fort/portal_login endpoint with command injection payloads embedded in the loginUrl parameter. Attackers may use common shell metacharacters such as ;, |, &&, backticks, or $() to append or substitute commands. Technical details and proof-of-concept information have been disclosed via the H4cker Blog Post and additional information is available through VulDB #331634.

Detection Methods for CVE-2025-12916

Indicators of Compromise

• Unusual HTTP requests to /fort/portal_login containing shell metacharacters in the loginUrl parameter
• Unexpected child processes spawned by the web server process handling the Sangfor application
• Log entries showing command injection patterns such as semicolons, pipes, backticks, or $() syntax in request parameters
• Unauthorized file access or modifications in system directories following web application requests

Detection Strategies

• Implement web application firewall (WAF) rules to detect and block command injection patterns in HTTP parameters targeting /fort/portal_login
• Configure intrusion detection systems (IDS) to alert on suspicious command execution patterns from web server processes
• Enable detailed logging for the Sangfor Operation and Maintenance Security Management System and monitor for anomalous loginUrl parameter values
• Deploy endpoint detection and response (EDR) solutions to identify unusual process execution chains originating from the web application

Monitoring Recommendations

• Monitor web server access logs for requests to /fort/portal_login with unusually long or encoded loginUrl parameter values
• Set up alerts for process creation events where the parent process is the Sangfor web application and the child process is a shell or system utility
• Review authentication logs for suspicious login patterns that may indicate attackers establishing the low-privilege access required for exploitation
• Implement network traffic analysis to detect data exfiltration attempts following successful exploitation

How to Mitigate CVE-2025-12916

Immediate Actions Required

• Upgrade Sangfor Operation and Maintenance Security Management System to version 3.0.11 or 3.0.12 immediately
• If immediate patching is not possible, implement network segmentation to limit access to the /fort/portal_login endpoint
• Deploy web application firewall rules to block requests containing command injection patterns
• Conduct a security review of systems that may have been exposed to determine if exploitation has occurred

Patch Information

Sangfor has addressed this vulnerability in versions 3.0.11 and 3.0.12 of the Operation and Maintenance Security Management System. Organizations should prioritize upgrading to these patched versions to remediate the command injection vulnerability. For additional vulnerability tracking information, refer to VulDB CTI ID #331634 and VulDB Submission #678377.

Workarounds

• Restrict network access to the /fort/portal_login endpoint to trusted IP addresses only using firewall rules
• Implement strict input validation on the loginUrl parameter at the network perimeter using a WAF
• Monitor and log all access attempts to the vulnerable endpoint for forensic purposes until patching is complete
• Consider temporarily disabling the affected Frontend component if it is not critical to operations

# Example firewall rule to restrict access to vulnerable endpoint
# Adjust network range and interface as appropriate for your environment
iptables -A INPUT -p tcp --dport 443 -m string --string "/fort/portal_login" --algo bm -j DROP
# Allow only from trusted management network
iptables -I INPUT -p tcp --dport 443 -s 10.0.0.0/24 -j ACCEPT