CVE-2025-1338: NUUO Camera Command Injection Vulnerability

CVE-2025-1338 Overview

A critical command injection vulnerability has been identified in NUUO Camera devices running firmware versions up to 20250203. The vulnerability exists in the print_file function within the /handle_config.php file, where improper handling of the log parameter allows attackers to inject and execute arbitrary commands on the affected device. This flaw can be exploited remotely without authentication, making it a significant security concern for organizations using affected NUUO surveillance systems.

Critical Impact

Remote attackers can execute arbitrary commands on vulnerable NUUO Camera devices by manipulating the log parameter in /handle_config.php, potentially leading to complete device compromise, unauthorized access to video feeds, and lateral movement within the network.

Affected Products

• NUUO Camera firmware versions up to 20250203
• NUUO Camera devices with /handle_config.php endpoint accessible

Discovery Timeline

• February 16, 2025 - CVE-2025-1338 published to NVD
• February 16, 2025 - Last updated in NVD database

Technical Details for CVE-2025-1338

Vulnerability Analysis

This command injection vulnerability (CWE-74: Improper Neutralization of Special Elements in Output Used by a Downstream Component) stems from insufficient input validation in the print_file function. When processing requests to /handle_config.php, the application fails to properly sanitize the log parameter before passing it to system-level commands. This allows an attacker to craft malicious input containing shell metacharacters that escape the intended command context and execute arbitrary commands with the privileges of the web server process.

The vulnerability is network-accessible, requires no authentication or user interaction, and has been publicly disclosed. The exploit has been made available, which significantly increases the risk of active exploitation in the wild. The vendor was contacted about this vulnerability but did not respond.

Root Cause

The root cause of this vulnerability is improper input validation in the print_file function of /handle_config.php. The log parameter is directly incorporated into system commands without adequate sanitization or escaping of special characters. This failure to implement proper input validation allows shell metacharacters such as semicolons, pipes, and backticks to be interpreted by the underlying shell, enabling command injection attacks.

Attack Vector

The attack can be initiated remotely over the network. An attacker sends a specially crafted HTTP request to the /handle_config.php endpoint with a malicious payload in the log parameter. The payload typically includes command separators (such as ;, |, or &&) followed by arbitrary commands the attacker wishes to execute. Since no authentication is required, any attacker with network access to the vulnerable device can exploit this vulnerability.

The exploitation typically involves appending shell commands to the log parameter value. When processed by the print_file function, these injected commands are executed with the privileges of the web server, allowing attackers to read sensitive files, establish reverse shells, modify system configurations, or pivot to other systems on the network.

Detection Methods for CVE-2025-1338

Indicators of Compromise

• Unusual HTTP requests to /handle_config.php containing shell metacharacters (;, |, &&, `, $()) in the log parameter
• Unexpected outbound network connections from NUUO Camera devices
• Presence of unauthorized files or modified configurations on affected devices
• Anomalous process spawning from web server processes on camera devices

Detection Strategies

• Implement web application firewall (WAF) rules to detect and block requests containing command injection payloads targeting /handle_config.php
• Monitor network traffic for suspicious requests to NUUO Camera web interfaces, particularly requests with special characters in parameters
• Deploy intrusion detection signatures to identify command injection attempts against IoT devices
• Review web server access logs for requests to /handle_config.php with abnormal parameter values

Monitoring Recommendations

• Enable comprehensive logging on NUUO Camera devices and forward logs to a centralized SIEM solution
• Monitor for unusual process creation or file system modifications on camera devices
• Set up alerts for unexpected outbound connections from surveillance network segments
• Regularly audit network traffic patterns from IoT and surveillance devices for anomalies

How to Mitigate CVE-2025-1338

Immediate Actions Required

• Isolate affected NUUO Camera devices from untrusted networks immediately
• Restrict network access to the /handle_config.php endpoint using firewall rules or access control lists
• Place vulnerable devices behind a properly configured reverse proxy or WAF with command injection protection
• Audit affected devices for signs of compromise before reconnecting to production networks

Patch Information

As of the publication date, the vendor (NUUO) was contacted about this vulnerability but did not respond. No official patch is currently available. Organizations should monitor vendor communications and the VulDB entry for updates regarding patch availability. In the absence of an official fix, implementing the workarounds below is strongly recommended.

Workarounds

• Block external access to NUUO Camera web interfaces at the network perimeter
• Implement strict network segmentation to isolate surveillance systems from critical infrastructure
• Deploy a web application firewall with rules to filter command injection attempts targeting the log parameter
• Consider replacing affected devices with alternative solutions from vendors with active security support
• If device must remain accessible, implement IP whitelisting to restrict access to authorized management systems only

# Example iptables rules to restrict access to NUUO Camera web interface
# Only allow management access from trusted IP range
iptables -A INPUT -p tcp --dport 80 -s 192.168.1.0/24 -j ACCEPT
iptables -A INPUT -p tcp --dport 443 -s 192.168.1.0/24 -j ACCEPT
iptables -A INPUT -p tcp --dport 80 -j DROP
iptables -A INPUT -p tcp --dport 443 -j DROP