CVE-2025-3204: Codeastro Car Rental System SQLI Flaw

CVE-2025-3204 Overview

A critical SQL injection vulnerability has been discovered in CodeAstro Car Rental System version 1.0. The vulnerability exists in the /returncar.php file, where improper handling of the ID parameter allows attackers to inject malicious SQL commands. This flaw enables remote attackers to manipulate database queries, potentially leading to unauthorized data access, modification, or complete database compromise.

Critical Impact

Remote attackers can exploit this SQL injection vulnerability to extract sensitive customer data, modify rental records, or potentially gain further access to the underlying database server.

Affected Products

• CodeAstro Car Rental System 1.0

Discovery Timeline

• April 4, 2025 - CVE-2025-3204 published to NVD
• April 15, 2025 - Last updated in NVD database

Technical Details for CVE-2025-3204

Vulnerability Analysis

This SQL injection vulnerability (CWE-89) stems from insufficient input validation in the returncar.php file of the CodeAstro Car Rental System. The ID parameter is directly incorporated into SQL queries without proper sanitization or parameterization, allowing attackers to craft malicious input that alters the intended query logic.

The vulnerability is classified under CWE-74 (Improper Neutralization of Special Elements in Output Used by a Downstream Component) and CWE-89 (Improper Neutralization of Special Elements used in an SQL Command). This indicates that user-supplied data is being processed without adequate filtering or escaping before being used in database operations.

From a network accessibility perspective, the attack can be launched remotely, requiring only low-level privileges to execute. The exploit has been publicly disclosed, increasing the urgency for organizations using this software to implement mitigations immediately.

Root Cause

The root cause of this vulnerability lies in the application's failure to implement secure coding practices for database interactions. Specifically, the returncar.php endpoint directly concatenates user input from the ID parameter into SQL queries rather than utilizing prepared statements or parameterized queries. This allows specially crafted input to escape the intended query context and inject arbitrary SQL commands.

Attack Vector

The attack is network-based and can be executed remotely. An attacker with low-level privileges can craft malicious HTTP requests to the /returncar.php endpoint, manipulating the ID parameter to inject SQL commands. The injection techniques available include:

• Union-based injection: Extracting data from other tables by appending UNION SELECT statements
• Error-based injection: Leveraging database error messages to extract information
• Boolean-based blind injection: Inferring data through true/false query responses
• Time-based blind injection: Using database delay functions to extract data character by character

The vulnerability can be exploited by appending SQL metacharacters and commands to the ID parameter value. For detailed technical analysis and proof-of-concept information, refer to the GitHub Issue on CVE Report and VulDB entry #303158.

Detection Methods for CVE-2025-3204

Indicators of Compromise

• Unusual database queries in application logs containing SQL keywords such as UNION, SELECT, OR 1=1, or comment characters (--, #)
• Unexpected access to the /returncar.php endpoint with abnormal ID parameter values
• Database error messages appearing in web server logs
• Evidence of data exfiltration or unauthorized database modifications in audit logs

Detection Strategies

• Implement Web Application Firewall (WAF) rules to detect SQL injection patterns in HTTP requests to /returncar.php
• Configure intrusion detection systems (IDS) to alert on SQL injection signatures targeting the application
• Monitor database query logs for anomalous queries originating from the web application
• Deploy runtime application self-protection (RASP) solutions to detect and block injection attempts in real-time

Monitoring Recommendations

• Enable detailed logging for all requests to /returncar.php and review regularly for suspicious patterns
• Set up alerts for database queries containing concatenated user input or SQL syntax anomalies
• Monitor for unusual database account activity or privilege escalation attempts
• Implement network traffic analysis to detect data exfiltration patterns from the database server

How to Mitigate CVE-2025-3204

Immediate Actions Required

• Restrict access to the /returncar.php endpoint until a patch is available or the vulnerability is remediated
• Implement input validation to filter and sanitize the ID parameter, allowing only numeric values
• Deploy a Web Application Firewall (WAF) with SQL injection detection rules as a temporary protective measure
• Review and audit all database access in the application for similar vulnerabilities
• Consider taking the application offline if it processes sensitive data and cannot be adequately protected

Patch Information

As of the last modification date (April 15, 2025), no official patch has been released by CodeAstro for this vulnerability. Organizations should monitor the CodeAstro website for security updates and apply any patches immediately upon release. In the interim, implement the workarounds and mitigation strategies outlined below.

Workarounds

• Refactor the vulnerable code to use prepared statements or parameterized queries for all database operations
• Implement strict input validation on the ID parameter to accept only integer values
• Apply the principle of least privilege to database accounts used by the application
• Segment the database server from other network resources to limit lateral movement potential
• Use stored procedures with properly parameterized inputs as an additional defense layer

# Example: Input validation in PHP (recommended remediation approach)
# Replace direct parameter usage with prepared statements
# In returncar.php, change:
#   $id = $_GET['ID'];
#   $query = "SELECT * FROM cars WHERE id = $id";
# To:
#   $id = filter_input(INPUT_GET, 'ID', FILTER_VALIDATE_INT);
#   if ($id === false) { die("Invalid ID"); }
#   $stmt = $pdo->prepare("SELECT * FROM cars WHERE id = ?");
#   $stmt->execute([$id]);