CVE-2025-14707: Sgwbox N3 Firmware RCE Vulnerability

CVE-2025-14707 Overview

A command injection vulnerability has been discovered in Shiguangwu sgwbox N3 firmware version 2.0.25. The flaw exists within the /usr/sbin/http_eshell_server component associated with the DOCKER Feature. An attacker can exploit this vulnerability by manipulating the params argument, allowing arbitrary command execution on the affected device. The attack can be initiated remotely without authentication, posing a significant risk to exposed devices. The exploit has been publicly disclosed, and the vendor was contacted but did not respond to disclosure attempts.

Critical Impact

Unauthenticated remote attackers can execute arbitrary system commands on vulnerable Shiguangwu sgwbox N3 devices via command injection in the DOCKER feature, potentially leading to complete device compromise.

Affected Products

• Shiguangwu sgwbox N3 Firmware version 2.0.25
• Shiguangwu sgwbox N3 Hardware

Discovery Timeline

• 2025-12-15 - CVE-2025-14707 published to NVD
• 2026-01-09 - Last updated in NVD database

Technical Details for CVE-2025-14707

Vulnerability Analysis

This vulnerability is classified as a command injection flaw (CWE-77) with broader injection characteristics (CWE-74). The vulnerable component is the http_eshell_server binary located at /usr/sbin/http_eshell_server, which handles HTTP requests related to the DOCKER feature on the sgwbox N3 NAS device.

The vulnerability stems from improper handling of the params argument within the HTTP request processing logic. When user-controlled input is passed to this parameter, it is not properly sanitized before being used in system command execution contexts. This allows attackers to inject shell metacharacters and arbitrary commands that will be executed with the privileges of the running service.

The network-accessible nature of this vulnerability significantly increases its risk profile, as it can be exploited remotely without requiring physical access to the device. The lack of authentication requirements further compounds the severity, enabling any network-adjacent or internet-exposed attacker to potentially compromise vulnerable devices.

Root Cause

The root cause of this vulnerability is insufficient input validation and sanitization of the params argument in the http_eshell_server component. The application fails to properly escape or filter shell metacharacters and special characters before incorporating user input into system commands. This classic command injection pattern allows attackers to break out of the intended command context and execute arbitrary commands.

Attack Vector

The attack vector is network-based, requiring no authentication or user interaction. An attacker can craft malicious HTTP requests targeting the /usr/sbin/http_eshell_server endpoint with specially crafted params values containing shell metacharacters (such as ;, |, &&, or backticks). When the vulnerable server processes these requests, the injected commands are executed on the underlying system.

The exploitation typically involves:

1. Identifying an exposed sgwbox N3 device running vulnerable firmware
2. Crafting an HTTP request to the DOCKER feature endpoint
3. Including malicious command injection payloads in the params argument
4. The server executes the injected commands with its operational privileges

For detailed technical analysis of this vulnerability, refer to the Notion Security Analysis on NAS N3 and the VulDB entry #336424.

Detection Methods for CVE-2025-14707

Indicators of Compromise

• Unusual HTTP requests to the DOCKER feature endpoints containing shell metacharacters or encoded command sequences in the params parameter
• Unexpected processes spawned by http_eshell_server or child processes executing commands unrelated to normal DOCKER operations
• Outbound network connections from the NAS device to unknown external hosts indicating potential reverse shell activity
• System log entries showing command execution errors or unusual shell activity originating from the HTTP server process

Detection Strategies

• Monitor HTTP access logs for requests to /usr/sbin/http_eshell_server related endpoints containing suspicious characters like ;, |, &&, $(), or backticks in parameters
• Implement network intrusion detection rules to identify command injection patterns in HTTP traffic destined for sgwbox N3 devices
• Deploy endpoint detection to monitor process creation chains, specifically watching for shell processes spawned by the HTTP server component
• Utilize SentinelOne Singularity Platform's behavioral AI to detect anomalous command execution patterns on IoT and NAS devices

Monitoring Recommendations

• Enable verbose logging on sgwbox N3 devices to capture all HTTP requests and system commands executed
• Configure network monitoring to alert on unusual traffic patterns from NAS devices, including reverse shell indicators
• Implement regular vulnerability scanning to identify exposed sgwbox N3 devices on your network
• Monitor for firmware version 2.0.25 on inventory systems and flag for immediate remediation

How to Mitigate CVE-2025-14707

Immediate Actions Required

• Isolate affected sgwbox N3 devices from untrusted networks and the internet immediately
• Implement network segmentation to restrict access to the vulnerable DOCKER feature endpoint
• Apply strict firewall rules to limit which hosts can communicate with the sgwbox N3 management interfaces
• Monitor affected devices for signs of compromise and conduct forensic analysis if suspicious activity is detected

Patch Information

At the time of this publication, no vendor patch is available for this vulnerability. The vendor (Shiguangwu) was contacted during the disclosure process but did not respond. Organizations should monitor the vendor's official channels for any future security updates and apply patches immediately when available.

Given the lack of vendor response, affected organizations should consider:

• Replacing vulnerable devices with supported alternatives
• Implementing compensating controls as described in the workarounds section
• Engaging with the vendor directly to request a security fix

Workarounds

• Disable the DOCKER feature on sgwbox N3 devices if not required for business operations
• Place vulnerable devices behind a reverse proxy or web application firewall (WAF) that can filter malicious request patterns
• Implement network access control lists (ACLs) to restrict access to the device's HTTP management interface to trusted IP addresses only
• Consider deploying VPN requirements for any remote access to the NAS device management interface

# Example firewall rule to restrict access to sgwbox N3 management interface
# Replace 192.168.1.100 with your sgwbox N3 IP and 10.0.0.0/24 with trusted network
iptables -A INPUT -d 192.168.1.100 -p tcp --dport 80 -s 10.0.0.0/24 -j ACCEPT
iptables -A INPUT -d 192.168.1.100 -p tcp --dport 80 -j DROP
iptables -A INPUT -d 192.168.1.100 -p tcp --dport 443 -s 10.0.0.0/24 -j ACCEPT
iptables -A INPUT -d 192.168.1.100 -p tcp --dport 443 -j DROP