SourceCodester COVID-19 Testing Management System SQL Injection Vulnerability

A SQL injection vulnerability has been identified in SourceCodester COVID-19 Testing Management System version 1.0. The issue resides in the file '/check_availability.php', where the 'employeeid' parameter is manipulated, allowing attackers to inject malicious SQL queries. This vulnerability can be exploited remotely, without any authentication.

Impact

Exploitation of this vulnerability allows unauthorized access to the database, where attackers can leak, modify, or delete data. Additionally, it could lead to unauthorized control over the system or cause a service interruption.

Reproduction

The vulnerability can be reproduced by sending a POST request to 'check_availability.php' with the 'employeeid' parameter. Various payloads can be used to exploit the SQL injection, such as boolean-based blind injection or error-based injection, taking advantage of the application's SQL query handling.

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.