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_supplier' function of 'ajax.php', where the 'id' parameter is manipulated, allowing for the injection of malicious SQL queries. This vulnerability can be exploited remotely, potentially leading to unauthorized database access, data manipulation, and disruption of service.

Impact

Exploitation of this vulnerability allows for unauthorized access to the database, with possibilities of data leakage, unauthorized data modification, and in some cases, gaining control over the system or causing a service disruption.

Reproduction

The vulnerability can be reproduced by sending a POST request to 'ajax.php?action=save_supplier' with a crafted 'id' parameter that includes a malicious SQL payload. This payload can be designed to manipulate the SQL query execution, such as extracting database information or modifying database records.

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.