SourceCodester Pharmacy Sales and Inventory System SQL Injection Vulnerability

A SQL injection vulnerability has been identified in SourceCodester Pharmacy Sales and Inventory System version 1.0. The issue arises in the 'save_expired' function of 'ajax.php', where the 'id' parameter is manipulated, allowing attackers to inject malicious SQL queries. This vulnerability can be exploited remotely, leading to unauthorized database access, data manipulation, and potential system control.

Impact

Exploitation of this vulnerability allows for SQL injection, enabling attackers to interfere with database queries. This could result in unauthorized data access, data modification or deletion, and in some cases, executing administrative operations on the database.

Reproduction

The vulnerability can be reproduced by sending a POST request to 'ajax.php' with the 'action' parameter set to 'save_expired'. The 'id' parameter should be crafted to include a SQL injection payload, such as a boolean-based blind SQL injection payload that exploits the application's SQL query handling.

Remediation

To address this vulnerability, it is recommended to use prepared statements and parameter binding to prevent SQL injection. Additionally, input validation and filtering should be implemented to ensure user input conforms to expected formats. Minimizing database user permissions and conducting regular security audits can also help enhance overall system security.