itsourcecode Online Examination System SQL Injection Vulnerability in Version 1.0

A critical SQL injection vulnerability has been identified in the itsourcecode Online Examination System version 1.0. The issue resides in the '/Online/index.php' file, where the 'username' parameter is manipulated, allowing attackers to inject malicious SQL queries. This vulnerability can be exploited remotely, without authentication, leading to unauthorized database access, data modification or deletion, and exposure of sensitive information.

Impact

Exploitation of this vulnerability allows for SQL injection, enabling attackers to manipulate database queries. This could result in unauthorized data access, data leakage, data modification or deletion, and potentially allow attackers to gain control over the application or its underlying server.

Reproduction

The vulnerability can be reproduced by sending a POST request to the '/Online/query/loginExe.php' endpoint. The request must include a 'username' parameter with a crafted payload that exploits the SQL injection flaw, such as using a SQL injection payload that leverages time-based blind SQL injection techniques, like causing the database to sleep for a specified duration. This indicates that the injection was successful.

Remediation

It is recommended to use prepared statements and parameter binding to prevent SQL injection, validate and filter user input, minimize database user permissions, and conduct regular security audits.