CVE-2024-3685: DedeCMS SQL Injection Vulnerability

CVE-2024-3685 Overview

A critical SQL injection vulnerability has been identified in DedeCMS version 5.7.112-UTF8, a widely-used Chinese content management system. The vulnerability exists in the stepselect_main.php file, where improper handling of the ids parameter allows remote attackers to inject malicious SQL commands. This flaw enables unauthenticated attackers to compromise the database, potentially leading to full system compromise through data theft, modification, or deletion.

Critical Impact

Remote attackers can exploit this SQL injection vulnerability without authentication to access, modify, or delete sensitive database contents, potentially leading to complete system compromise.

Affected Products

• DedeCMS 5.7.112-UTF8
• DedeCMS content management system installations using the vulnerable stepselect_main.php component

Discovery Timeline

• 2024-04-12 - CVE-2024-3685 published to NVD
• 2025-04-08 - Last updated in NVD database

Technical Details for CVE-2024-3685

Vulnerability Analysis

This vulnerability is a classic SQL injection (CWE-89) that occurs due to insufficient input validation in the stepselect_main.php file of DedeCMS. When user-supplied data is passed through the ids parameter, the application fails to properly sanitize or parameterize the input before incorporating it into SQL queries. This allows attackers to craft malicious input that breaks out of the intended SQL context and executes arbitrary database commands.

The network-accessible nature of this vulnerability means it can be exploited remotely without requiring authentication or user interaction, making it particularly dangerous for internet-facing DedeCMS installations. Successful exploitation could lead to unauthorized access to sensitive data, database manipulation, and potentially serve as a stepping stone for further attacks against the underlying server infrastructure.

Root Cause

The root cause of this vulnerability is improper input validation and the use of unsanitized user input in SQL queries within the stepselect_main.php file. The ids parameter is directly concatenated or interpolated into SQL statements without proper escaping, parameterization, or prepared statements. This violates secure coding practices and allows attackers to manipulate the structure of SQL queries executed by the application.

Attack Vector

This vulnerability can be exploited remotely over the network by sending specially crafted HTTP requests to the stepselect_main.php endpoint. The attacker manipulates the ids parameter to include SQL metacharacters and commands that alter the behavior of the underlying database query. Since no authentication is required and no user interaction is needed, exploitation is straightforward for attackers with knowledge of the vulnerable endpoint.

The attack can be performed using standard web request tools, making it accessible to attackers with basic SQL injection skills. A proof-of-concept document has been publicly disclosed, which increases the risk of exploitation in the wild.

For technical details on exploitation methodology, refer to the GitHub CVE PoC Document or the VulDB advisory.

Detection Methods for CVE-2024-3685

Indicators of Compromise

• Unusual or malformed requests to stepselect_main.php containing SQL syntax in the ids parameter
• Database query logs showing unexpected SQL commands such as UNION SELECT, OR 1=1, or other injection patterns
• Web access logs with encoded SQL characters targeting the vulnerable endpoint
• Unexpected database modifications or data exfiltration activity

Detection Strategies

• Deploy Web Application Firewall (WAF) rules to detect and block SQL injection patterns in requests to stepselect_main.php
• Enable detailed logging on web servers and database systems to capture suspicious query patterns
• Implement intrusion detection system (IDS) signatures for SQL injection attack patterns targeting DedeCMS
• Use SentinelOne Singularity Platform for real-time threat detection and behavioral analysis of web application attacks

Monitoring Recommendations

• Monitor web server access logs for requests containing SQL injection payloads or encoded characters in the ids parameter
• Set up alerts for database query anomalies, including queries that attempt to access system tables or perform data exfiltration
• Review application error logs for SQL syntax errors that may indicate failed injection attempts
• Implement network traffic analysis to detect data exfiltration patterns following potential exploitation

How to Mitigate CVE-2024-3685

Immediate Actions Required

• Restrict public access to stepselect_main.php or the entire DedeCMS administrative interface using IP whitelisting or VPN requirements
• Deploy Web Application Firewall (WAF) rules to block SQL injection attempts targeting the ids parameter
• Implement network segmentation to isolate the web server and database server
• Review database accounts used by DedeCMS and apply the principle of least privilege

Patch Information

As of the last update, the vendor (DedeCMS) has not responded to responsible disclosure attempts and no official patch has been released. Organizations using DedeCMS 5.7.112-UTF8 should implement the recommended workarounds and monitor for vendor security advisories. Consider migrating to an alternative CMS solution if patches are not released in a timely manner.

For ongoing vulnerability tracking, refer to VulDB ID #260472.

Workarounds

• Implement input validation on the ids parameter at the web server or reverse proxy level to reject requests containing SQL metacharacters
• Use a Web Application Firewall (WAF) with SQL injection protection enabled to filter malicious requests
• Restrict access to stepselect_main.php to trusted IP addresses only using web server configuration
• Consider disabling the vulnerable component if it is not required for business operations

# Example Apache configuration to restrict access to vulnerable file
<Files "stepselect_main.php">
    Require ip 10.0.0.0/8
    Require ip 192.168.0.0/16
</Files>