CVE-2024-4973: Simple Chat System SQL Injection Flaw

CVE-2024-4973 Overview

CVE-2024-4973 is a SQL injection vulnerability in code-projects Simple Chat System 1.0. The flaw resides in the /register.php script, where the name, number, and address parameters are passed to backend SQL queries without proper sanitization. Remote attackers can manipulate these parameters to inject arbitrary SQL statements. The vulnerability has been publicly disclosed under VulDB identifier 264538, and exploit details are available in the public domain. The weakness maps to CWE-89, Improper Neutralization of Special Elements used in an SQL Command.

Critical Impact

Remote attackers with low privileges can inject SQL statements through the registration endpoint, compromising the confidentiality, integrity, and availability of the chat application database.

Affected Products

• code-projects Simple Chat System 1.0
• /register.php registration component
• Deployments using the affected name, number, and address input parameters

Discovery Timeline

• 2024-05-16 - CVE-2024-4973 published to NVD
• 2025-02-18 - Last updated in NVD database

Technical Details for CVE-2024-4973

Vulnerability Analysis

The vulnerability exists in the user registration workflow handled by /register.php. The script accepts client-supplied values for name, number, and address and incorporates them directly into SQL statements. Because the application does not parameterize queries or escape user input, attacker-controlled strings alter the query structure. An unauthenticated remote actor can submit a crafted HTTP request to manipulate the underlying database query. Successful exploitation can read, modify, or delete database records used by the chat application.

Root Cause

The root cause is improper neutralization of special characters in SQL commands [CWE-89]. The registration handler concatenates user-supplied strings into SQL statements without using prepared statements or parameter binding. PHP-based input from the $_POST superglobal flows directly into query strings executed against the MySQL backend.

Attack Vector

The attack is performed remotely over the network with low privileges and no user interaction. An attacker submits a POST request to /register.php containing SQL metacharacters and payloads in the name, number, or address fields. The injected payload modifies the query logic to extract data through union-based, error-based, or boolean-based techniques. Public exploitation details are documented in the GitHub SQL Injection Analysis and the VulDB entry 264538.

No verified proof-of-concept code is included here. Refer to the public references for technical exploitation details.

Detection Methods for CVE-2024-4973

Indicators of Compromise

• HTTP POST requests to /register.php containing SQL metacharacters such as single quotes, UNION SELECT, --, OR 1=1, or hexadecimal payloads in the name, number, or address fields
• Unexpected MySQL errors logged by the application server referencing the registration query
• Anomalous registration activity from a single source IP submitting repeated malformed payloads

Detection Strategies

• Inspect web server access logs for register.php requests containing encoded or raw SQL syntax
• Enable database query logging and alert on registration-related queries that deviate from the expected parameter pattern
• Deploy a web application firewall (WAF) rule set tuned for SQL injection signatures on the registration endpoint

Monitoring Recommendations

• Correlate WAF blocks, application error logs, and database audit trails to surface injection attempts
• Track outbound data volume from the database server for signs of bulk extraction
• Alert on new or unexpected database users, schema modifications, or privilege changes

How to Mitigate CVE-2024-4973

Immediate Actions Required

• Restrict public exposure of the Simple Chat System 1.0 application until input validation is implemented
• Apply WAF signatures that block SQL injection patterns targeting /register.php
• Audit the chat application database for unauthorized records, modified accounts, or suspicious queries
• Rotate database credentials if exploitation is suspected

Patch Information

No official vendor patch is listed in the NVD record for CVE-2024-4973. Operators of code-projects Simple Chat System 1.0 should refactor /register.php to use parameterized queries with PDO or mysqli prepared statements, and apply server-side input validation to all registration fields.

Workarounds

• Replace direct query concatenation with prepared statements using mysqli_prepare() or PDO parameter binding
• Enforce strict allow-list validation on the name, number, and address parameters before reaching the database layer
• Run the application database account with least-privilege permissions to limit the blast radius of injection
• Place the application behind a reverse proxy with SQL injection filtering enabled

# Example: enable ModSecurity OWASP CRS SQL injection rules in front of the application
SecRuleEngine On
Include /etc/modsecurity/crs/crs-setup.conf
Include /etc/modsecurity/crs/rules/REQUEST-942-APPLICATION-ATTACK-SQLI.conf