CVE-2024-2647
📋 TL;DR
This critical SQL injection vulnerability in Netentsec NS-ASG Application Security Gateway allows remote attackers to execute arbitrary SQL commands via the loginId parameter in the /admin/singlelogin.php file. Organizations using NS-ASG 6.3 are affected, potentially enabling attackers to bypass authentication, access sensitive data, or compromise the gateway.
💻 Affected Systems
- Netentsec NS-ASG Application Security Gateway
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete compromise of the security gateway, credential theft, lateral movement into protected networks, and persistent backdoor installation.
Likely Case
Authentication bypass leading to administrative access, extraction of sensitive configuration data, and potential gateway takeover.
If Mitigated
Limited impact with proper network segmentation, WAF protection, and monitoring detecting SQL injection attempts.
🎯 Exploit Status
Exploit code is publicly available on GitHub, making this easily weaponizable. The vulnerability requires no authentication.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: None available - vendor did not respond to disclosure
Restart Required: No
Instructions:
No official patch available. Consider upgrading to a newer version if available, or implement workarounds.
🔧 Temporary Workarounds
Web Application Firewall Rule
allDeploy WAF rules to block SQL injection attempts targeting /admin/singlelogin.php
# Example ModSecurity rule: SecRule ARGS:loginId "@detectSQLi" "id:1001,phase:2,deny,status:403,msg:'SQLi attempt detected'"
# Example naxsi rule: MainRule "str:loginId" "msg:sql injection" "mz:ARGS" "s:$SQL:4" id:1001;
Access Restriction
allRestrict access to /admin/singlelogin.php to trusted IP addresses only
# Apache: <Location /admin/singlelogin.php> Order deny,allow Deny from all Allow from 192.168.1.0/24 </Location>
# Nginx: location /admin/singlelogin.php { allow 192.168.1.0/24; deny all; }
🧯 If You Can't Patch
- Isolate the NS-ASG appliance in a dedicated network segment with strict firewall rules limiting inbound/outbound traffic.
- Implement comprehensive monitoring and alerting for SQL injection patterns in web server logs and network traffic.
🔍 How to Verify
Check if Vulnerable:
Test by sending a SQL injection payload to https://[target]/admin/singlelogin.php?loginId=1' OR '1'='1 and observing if it returns different behavior than legitimate requests.Check Version:
Check the appliance web interface or administrative console for version information. Typically found in System > About or similar menu.Verify Fix Applied:
After implementing workarounds, test with the same SQL injection payloads to confirm they are blocked or return appropriate error responses.📡 Detection & Monitoring
Log Indicators:
- Unusual SQL syntax in loginId parameter values
- Multiple failed login attempts with SQL patterns
- Access to /admin/singlelogin.php from unexpected IP addresses
Network Indicators:
- HTTP requests containing SQL keywords (UNION, SELECT, INSERT, etc.) in loginId parameter
- Abnormal response patterns from the gateway
SIEM Query:
source="web_logs" AND uri="/admin/singlelogin.php" AND (loginId="*'*" OR loginId="* OR *" OR loginId="*--*" OR loginId="*/*")