CVE-2025-14704 Overview
A path traversal vulnerability has been identified in Shiguangwu sgwbox N3 firmware version 2.0.25. The vulnerability exists within the /eshell API endpoint, where improper input validation allows attackers to manipulate file paths and traverse directories outside the intended web root. This remotely exploitable flaw enables unauthorized access to sensitive files on the affected NAS device.
Critical Impact
Remote attackers can exploit this path traversal vulnerability to access arbitrary files on the sgwbox N3 NAS device, potentially exposing sensitive configuration files, credentials, and user data without authentication.
Affected Products
- Shiguangwu sgwbox N3 Firmware version 2.0.25
- sgwbox N3 Hardware Device
Discovery Timeline
- 2025-12-15 - CVE-2025-14704 published to NVD
- 2026-01-09 - Last updated in NVD database
Technical Details for CVE-2025-14704
Vulnerability Analysis
This path traversal vulnerability (CWE-22) affects the /eshell API component of the Shiguangwu sgwbox N3 NAS device running firmware version 2.0.25. The vulnerability allows remote attackers to escape the intended directory structure and access files anywhere on the filesystem where the web server process has read permissions.
The attack is network-accessible with low complexity and requires no authentication or user interaction, making it particularly dangerous for internet-exposed NAS devices. Successful exploitation can result in limited confidentiality, integrity, and availability impacts on the affected system.
The vendor was contacted regarding this vulnerability but did not respond to the disclosure, leaving affected users without an official patch or guidance.
Root Cause
The root cause of this vulnerability is improper input validation within the /eshell API endpoint. The application fails to properly sanitize user-supplied input containing path traversal sequences such as ../ before using it in file system operations. This allows attackers to break out of the web application's intended directory and access arbitrary files on the underlying system.
Attack Vector
The attack vector is network-based, targeting the /eshell API endpoint on the sgwbox N3 device. An attacker can craft malicious HTTP requests containing directory traversal sequences to navigate outside the application's root directory and read sensitive files.
The vulnerability manifests in the /eshell component where user input is processed without adequate sanitization. Attackers can leverage standard path traversal techniques using sequences like ../ or encoded variants to access files such as configuration files, credentials, or system information. For detailed technical analysis, refer to the Notion Security Analysis and VulDB Entry #336421.
Detection Methods for CVE-2025-14704
Indicators of Compromise
- HTTP requests to /eshell containing path traversal sequences such as ../, ..%2f, or URL-encoded variants
- Unexpected file access patterns in web server logs targeting system files outside the web root
- Access attempts to sensitive files like /etc/passwd, configuration files, or credential stores through the API endpoint
Detection Strategies
- Monitor HTTP traffic for requests to /eshell containing directory traversal patterns in parameters
- Implement web application firewall (WAF) rules to detect and block path traversal sequences in API requests
- Review web server access logs for anomalous requests targeting the /eshell endpoint with unusual path characters
Monitoring Recommendations
- Enable detailed logging for all requests to the /eshell API endpoint
- Configure alerts for any access attempts to sensitive system directories through the web interface
- Monitor network traffic for reconnaissance activity targeting NAS device APIs
How to Mitigate CVE-2025-14704
Immediate Actions Required
- Restrict network access to the sgwbox N3 device by placing it behind a firewall or VPN
- Disable remote access to the device if not required for business operations
- Implement network segmentation to limit exposure of the NAS device to untrusted networks
- Consider taking the device offline until a vendor patch becomes available
Patch Information
No official patch is currently available from the vendor. According to the vulnerability disclosure, the vendor (Shiguangwu) was contacted regarding this issue but did not respond. Users should monitor the VulDB Entry for updates on vendor response and potential patches.
Workarounds
- Deploy a web application firewall (WAF) to filter requests containing path traversal patterns
- Restrict access to the /eshell endpoint using network access control lists (ACLs)
- If possible, disable the vulnerable API endpoint entirely through device configuration
- Implement IP whitelisting to limit access to trusted administrative networks only
# Example: Block access to vulnerable endpoint using iptables (if applicable)
# Restrict access to the device's web interface to trusted IP ranges
iptables -A INPUT -p tcp --dport 80 -s 192.168.1.0/24 -j ACCEPT
iptables -A INPUT -p tcp --dport 80 -j DROP
iptables -A INPUT -p tcp --dport 443 -s 192.168.1.0/24 -j ACCEPT
iptables -A INPUT -p tcp --dport 443 -j DROP
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
