CVE-2024-30871
📋 TL;DR
This vulnerability allows attackers to execute arbitrary SQL commands on Netentsec NS-ASG 6.3 devices via the /WebPages/applyhardware.php endpoint. Successful exploitation could lead to data theft, authentication bypass, or complete system compromise. Organizations using NS-ASG 6.3 are affected.
💻 Affected Systems
- Netentsec NS-ASG
📦 What is this software?
Ns Asg Firmware by Netentsec
⚠️ Risk & Real-World Impact
Worst Case
Complete compromise of the NS-ASG device, allowing attackers to steal all stored data, pivot to internal networks, and maintain persistent access.
Likely Case
Data exfiltration from the database, including user credentials, configuration data, and network information.
If Mitigated
Limited impact if proper input validation and WAF rules are in place, potentially only causing denial of service.
🎯 Exploit Status
Exploit details are publicly available in GitHub repositories, making this easy to weaponize.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: Unknown
Restart Required: No
Instructions:
Check Netentsec's official website or contact vendor support for patch availability and installation instructions.
🔧 Temporary Workarounds
Block Vulnerable Endpoint
linuxRestrict access to /WebPages/applyhardware.php via firewall or web server configuration.
iptables -A INPUT -p tcp --dport 80 -m string --string "/WebPages/applyhardware.php" --algo bm -j DROP
iptables -A INPUT -p tcp --dport 443 -m string --string "/WebPages/applyhardware.php" --algo bm -j DROP
Implement WAF Rules
allDeploy web application firewall rules to detect and block SQL injection attempts.
🧯 If You Can't Patch
- Isolate the NS-ASG device from the internet and restrict internal access to authorized users only.
- Implement network segmentation to limit potential lateral movement if the device is compromised.
🔍 How to Verify
Check if Vulnerable:
Test the /WebPages/applyhardware.php endpoint with SQL injection payloads (e.g., single quote) and observe error responses or unexpected behavior.Check Version:
Check the device web interface or CLI for version information; typically accessible via admin login.Verify Fix Applied:
After applying mitigations, retest the endpoint to ensure SQL injection attempts are blocked or no longer produce vulnerable responses.📡 Detection & Monitoring
Log Indicators:
- Unusual SQL error messages in web server logs
- Multiple failed login attempts or unusual query patterns to /WebPages/applyhardware.php
Network Indicators:
- HTTP requests containing SQL keywords (e.g., UNION, SELECT, INSERT) targeting the vulnerable endpoint
SIEM Query:
source="web_logs" AND uri="/WebPages/applyhardware.php" AND (query CONTAINS "'" OR query CONTAINS "UNION" OR query CONTAINS "SELECT")