CVE-2024-3457: Netentsec ASG SQLi Vulnerability

CVE-2024-3457 Overview

A critical SQL injection vulnerability has been identified in Netentsec NS-ASG Application Security Gateway version 6.3. The vulnerability exists in the /admin/config_ISCGroupNoCache.php file, where improper handling of the GroupId parameter allows attackers to inject malicious SQL commands. This flaw enables unauthenticated remote attackers to manipulate database queries, potentially leading to unauthorized data access, data modification, or complete system compromise.

Critical Impact

This SQL injection vulnerability allows unauthenticated remote attackers to execute arbitrary SQL commands against the backend database, potentially resulting in complete data breach, unauthorized administrative access, and full system compromise of the security gateway.

Affected Products

• Netentsec NS-ASG Application Security Gateway 6.3
• Netentsec Application Security Gateway (specific versions unconfirmed)

Discovery Timeline

• 2024-04-08 - CVE-2024-3457 published to NVD
• 2025-02-06 - Last updated in NVD database

Technical Details for CVE-2024-3457

Vulnerability Analysis

This vulnerability is classified as CWE-89: Improper Neutralization of Special Elements used in an SQL Command (SQL Injection). The flaw exists in the administrative interface of the Netentsec NS-ASG Application Security Gateway, specifically within the config_ISCGroupNoCache.php endpoint.

The vulnerable component fails to properly sanitize or parameterize the GroupId input parameter before incorporating it into database queries. This allows attackers to craft malicious input that breaks out of the intended query structure and executes arbitrary SQL commands. The network-accessible nature of this vulnerability, combined with the lack of authentication requirements, makes it particularly dangerous for internet-facing deployments.

The exploit has been publicly disclosed, increasing the risk of widespread exploitation. Technical documentation is available through GitHub CVE Documentation and VulDB #259713.

Root Cause

The root cause of this vulnerability is insufficient input validation and the use of unsanitized user input directly in SQL query construction. The GroupId parameter in /admin/config_ISCGroupNoCache.php is not properly escaped or validated before being concatenated into SQL statements. This classic SQL injection pattern occurs when dynamic SQL queries are built using string concatenation rather than parameterized queries or prepared statements.

Attack Vector

The attack can be initiated remotely over the network without requiring any authentication or user interaction. An attacker can send specially crafted HTTP requests to the /admin/config_ISCGroupNoCache.php endpoint with a malicious GroupId parameter value containing SQL injection payloads.

The exploitation process typically involves:

1. Identifying the vulnerable endpoint at /admin/config_ISCGroupNoCache.php
2. Crafting a malicious GroupId parameter containing SQL injection syntax
3. Sending the request to extract sensitive data, modify database contents, or escalate privileges
4. Potentially leveraging database access to achieve remote code execution through database-specific features

For detailed technical information about exploitation techniques, refer to the GitHub CVE Documentation.

Detection Methods for CVE-2024-3457

Indicators of Compromise

• Unusual HTTP requests to /admin/config_ISCGroupNoCache.php containing SQL syntax characters such as single quotes, UNION SELECT statements, or comment sequences
• Database error messages appearing in web server logs indicating malformed queries
• Unexpected database queries or data extraction patterns in database audit logs
• Authentication bypass attempts or unauthorized administrative access to the gateway

Detection Strategies

• Deploy web application firewall (WAF) rules to detect SQL injection patterns in the GroupId parameter
• Monitor HTTP access logs for requests to /admin/config_ISCGroupNoCache.php with suspicious parameter values
• Enable database query logging and alert on anomalous query patterns or syntax errors
• Implement intrusion detection signatures for common SQL injection attack patterns targeting this endpoint

Monitoring Recommendations

• Configure real-time alerting for access attempts to the vulnerable endpoint from external IP addresses
• Implement database activity monitoring to detect unauthorized data extraction or modification
• Review authentication logs for signs of privilege escalation following successful exploitation
• Monitor network traffic for data exfiltration patterns that may indicate post-exploitation activity

How to Mitigate CVE-2024-3457

Immediate Actions Required

• Restrict network access to the administrative interface /admin/ to trusted IP addresses only using firewall rules
• Implement a web application firewall (WAF) with SQL injection protection rules in front of the application
• Review database and web server logs for signs of prior exploitation
• Consider taking the vulnerable endpoint offline until a patch is available

Patch Information

As of the last update, no vendor patch has been publicly announced for this vulnerability. Organizations should monitor Netentsec's official channels for security updates. In the absence of a vendor patch, implementing the workarounds below is strongly recommended. For additional vulnerability details, consult VulDB CTI ID #259713.

Workarounds

• Implement network-level access controls to restrict administrative interface access to internal networks or VPN connections only
• Deploy a web application firewall with strict SQL injection filtering rules for the affected endpoint
• If possible, disable or rename the vulnerable PHP file /admin/config_ISCGroupNoCache.php if the functionality is not required
• Implement input validation at the application layer using a reverse proxy that sanitizes the GroupId parameter

# Example: Restrict access to admin directory using iptables
iptables -A INPUT -p tcp --dport 443 -m string --string "/admin/" --algo bm -j DROP
iptables -A INPUT -p tcp --dport 443 -s 10.0.0.0/8 -j ACCEPT

# Example: Apache mod_security rule to block SQL injection in GroupId
SecRule ARGS:GroupId "@detectSQLi" "id:1001,phase:2,deny,status:403,msg:'SQL Injection Attempt Blocked'"