CVE-2024-3770: PHPGurukul Student Record System SQLI

CVE-2024-3770 Overview

A critical SQL Injection vulnerability has been identified in PHPGurukul Student Record System version 3.20. This vulnerability exists in the /manage-courses.php file, specifically in the course deletion functionality where the del parameter is not properly sanitized before being used in SQL queries. An unauthenticated remote attacker can exploit this vulnerability to execute arbitrary SQL commands against the underlying database.

Critical Impact

This SQL Injection vulnerability allows remote attackers to bypass authentication, extract sensitive student data, modify or delete database records, and potentially achieve full database compromise without requiring any authentication.

Affected Products

• PHPGurukul Student Record System version 3.20

Discovery Timeline

• April 15, 2024 - CVE-2024-3770 published to NVD
• February 28, 2025 - Last updated in NVD database

Technical Details for CVE-2024-3770

Vulnerability Analysis

This vulnerability is classified as CWE-89 (SQL Injection), representing a critical flaw in input validation within a web application used for managing student records. The vulnerable endpoint /manage-courses.php?del=1 accepts user-supplied input through the del parameter without proper sanitization or parameterized queries. This allows attackers to inject malicious SQL statements that are executed directly against the database backend.

The impact of successful exploitation is severe. Attackers can extract confidential student information including personal details, grades, and academic records. Database manipulation is possible, allowing modification or deletion of critical educational data. In many configurations, SQL injection can be leveraged to achieve remote code execution on the underlying server through database features like INTO OUTFILE or extended stored procedures.

Root Cause

The root cause of this vulnerability is the direct inclusion of user-controllable input in SQL queries without proper sanitization, escaping, or the use of prepared statements. The del parameter value from the URL is concatenated directly into a SQL DELETE or SELECT statement, allowing attackers to break out of the intended query structure and inject their own SQL commands.

Attack Vector

The attack can be launched remotely over the network without requiring any authentication or user interaction. An attacker simply needs to craft a malicious URL targeting the vulnerable endpoint with a specially crafted del parameter value. The exploit has been publicly disclosed, making this vulnerability particularly dangerous for exposed instances.

The attack leverages the course deletion functionality, where the application expects a numeric course ID but fails to validate the input type or sanitize special characters. By injecting SQL metacharacters and additional SQL statements, an attacker can manipulate the query logic to extract data, bypass authentication, or perform destructive operations.

For detailed technical information about the exploitation mechanism, refer to the GitHub SQL Injection Exploit documentation.

Detection Methods for CVE-2024-3770

Indicators of Compromise

• Unusual HTTP requests to /manage-courses.php containing SQL syntax in the del parameter such as single quotes, UNION, SELECT, OR 1=1, or comment sequences like --
• Database error messages appearing in web application responses indicating query failures
• Unexpected database queries or access patterns in database logs, particularly SELECT statements returning large datasets or accessing sensitive tables
• Evidence of data exfiltration through DNS or HTTP channels if using out-of-band SQL injection techniques

Detection Strategies

• Deploy Web Application Firewall (WAF) rules to detect and block SQL injection patterns in URL parameters, specifically targeting the del parameter in requests to /manage-courses.php
• Enable and monitor web server access logs for requests containing suspicious characters or SQL keywords in query strings
• Implement database activity monitoring to detect anomalous query patterns, failed authentication attempts, or queries accessing sensitive tables
• Configure intrusion detection systems (IDS) with SQL injection signatures for PHP applications

Monitoring Recommendations

• Continuously monitor HTTP traffic to PHPGurukul Student Record System instances for SQL injection attack patterns
• Set up alerts for database errors in application logs that may indicate exploitation attempts
• Review database query logs for unusual patterns such as UNION-based data extraction or time-based blind SQL injection indicators
• Monitor for unauthorized access to student records or administrative functions

How to Mitigate CVE-2024-3770

Immediate Actions Required

• Immediately restrict network access to the PHPGurukul Student Record System to trusted IP addresses only
• Disable or remove the /manage-courses.php functionality if course deletion is not critical to operations
• Implement Web Application Firewall rules to filter SQL injection attempts targeting the del parameter
• Audit the database for signs of unauthorized access or data exfiltration
• Review and rotate database credentials if compromise is suspected

Patch Information

At the time of publication, no official vendor patch has been released for this vulnerability. Organizations should contact PHPGurukul for remediation guidance or consider applying manual code fixes. The vulnerability details are tracked under VulDB #260617.

Workarounds

• Modify the application code to use prepared statements or parameterized queries for all database interactions involving the del parameter
• Implement strict input validation to ensure the del parameter only accepts numeric values using server-side validation
• Deploy a reverse proxy or WAF in front of the application to filter malicious requests before they reach the vulnerable endpoint
• Consider migrating to an alternative student record management system that follows secure coding practices

# Example: Block SQL injection attempts using Apache mod_rewrite
# Add to .htaccess in the application root directory
RewriteEngine On
RewriteCond %{QUERY_STRING} (union|select|insert|delete|drop|update|concat|benchmark|sleep|load_file|into\s+outfile) [NC]
RewriteRule ^manage-courses\.php$ - [F,L]