CVE-2024-2329: Netentsec ASG SQL Injection Vulnerability

CVE-2024-2329 Overview

A critical SQL injection vulnerability has been discovered in Netentsec NS-ASG Application Security Gateway version 6.3. The vulnerability exists in the /admin/list_resource_icon.php file when processing the action=delete request. An attacker can exploit this flaw by manipulating the IconId parameter to inject malicious SQL commands, potentially leading to unauthorized access to the underlying database, data exfiltration, or complete system compromise.

Critical Impact

This SQL injection vulnerability allows unauthenticated remote attackers to execute arbitrary SQL commands against the backend database, potentially compromising sensitive data and system integrity of the security gateway appliance.

Affected Products

• Netentsec NS-ASG Application Security Gateway 6.3
• Netentsec Application Security Gateway (cpe:2.3:a:netentsec:application_security_gateway:6.3)

Discovery Timeline

• 2024-03-09 - CVE-2024-2329 published to NVD
• 2025-02-05 - Last updated in NVD database

Technical Details for CVE-2024-2329

Vulnerability Analysis

This vulnerability is classified as CWE-89 (SQL Injection), a severe input validation flaw that allows attackers to interfere with database queries. The affected endpoint /admin/list_resource_icon.php fails to properly sanitize user-supplied input in the IconId parameter when handling delete operations. This lack of input validation enables attackers to inject arbitrary SQL syntax that gets executed directly against the database server.

The vulnerability is particularly dangerous because it exists in the administrative interface of a security gateway product—an appliance specifically designed to protect network resources. Successful exploitation could allow an attacker to bypass the security gateway's protective functions entirely, extract sensitive configuration data, modify access rules, or pivot to other systems in the protected network.

Root Cause

The root cause of this vulnerability is improper input validation in the list_resource_icon.php file. The IconId parameter is directly incorporated into SQL queries without proper sanitization, parameterization, or prepared statements. When the action=delete functionality is invoked, the application constructs a dynamic SQL query using user-controlled input, creating a classic SQL injection attack surface.

Attack Vector

The attack can be launched remotely over the network without requiring authentication. An attacker can craft malicious HTTP requests to the vulnerable endpoint, injecting SQL payloads through the IconId parameter. The exploit has been publicly disclosed, meaning threat actors have access to the technical details needed to reproduce the attack. The vendor was contacted about this vulnerability but did not respond, leaving systems potentially without an official patch.

The attack flow involves sending specially crafted requests to the administrative interface with SQL injection payloads in the IconId parameter. Since the vulnerability requires no authentication and can be exploited over the network, any internet-exposed NS-ASG appliance running version 6.3 is at significant risk.

Detection Methods for CVE-2024-2329

Indicators of Compromise

• Unusual HTTP requests to /admin/list_resource_icon.php containing SQL keywords in the IconId parameter (e.g., UNION, SELECT, OR, AND, --, ;)
• Database error messages in application logs indicating malformed SQL syntax
• Unexpected database query patterns or high-volume read/write operations
• Evidence of data exfiltration or unauthorized access to sensitive database tables

Detection Strategies

• Deploy Web Application Firewall (WAF) rules to detect and block SQL injection patterns targeting the /admin/list_resource_icon.php endpoint
• Implement intrusion detection signatures for common SQL injection payloads in HTTP request parameters
• Monitor access logs for requests containing typical SQL injection characters and keywords in URL parameters
• Configure database activity monitoring to alert on unusual query patterns or excessive data access

Monitoring Recommendations

• Enable verbose logging on the NS-ASG appliance to capture all administrative interface requests
• Set up real-time alerting for any access attempts to /admin/list_resource_icon.php from untrusted IP addresses
• Monitor network traffic for suspicious patterns indicating reconnaissance or exploitation attempts against the administrative interface
• Implement file integrity monitoring on web application files to detect any unauthorized modifications

How to Mitigate CVE-2024-2329

Immediate Actions Required

• Restrict network access to the administrative interface (/admin/) to trusted IP addresses only using firewall rules
• If possible, disable or remove the /admin/list_resource_icon.php functionality until a patch is available
• Place a Web Application Firewall in front of the NS-ASG administrative interface to filter SQL injection attempts
• Review database logs for any signs of prior exploitation and assess potential data exposure

Patch Information

The vendor (Netentsec) was contacted about this vulnerability but did not respond. As of the last modification date (2025-02-05), no official patch has been publicly announced. Organizations should contact Netentsec directly for updated firmware or consider alternative mitigation strategies. Technical details about the vulnerability are available through the GitHub SQL Resource List and VulDB entry #256280.

Workarounds

• Implement network segmentation to isolate the NS-ASG administrative interface from untrusted networks
• Deploy a reverse proxy with input validation rules to sanitize requests before they reach the vulnerable endpoint
• Consider disabling the affected functionality if it is not critical to operations
• Evaluate alternative security gateway solutions if the vendor does not provide a timely security update
• Implement virtual patching through IPS/IDS rules to block exploitation attempts at the network level

# Example: Restrict administrative interface access using iptables
# Allow admin access only from trusted management network
iptables -A INPUT -p tcp --dport 443 -s 10.0.0.0/24 -j ACCEPT
iptables -A INPUT -p tcp --dport 443 -j DROP

# Block requests containing SQL injection patterns (example using ModSecurity)
# SecRule ARGS:IconId "@detectSQLi" "id:100001,phase:2,deny,status:403,log,msg:'SQL Injection attempt blocked'"