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 resides in the file '/ajax.php?action=delete_sales', where insufficient validation of the 'id' parameter allows attackers to inject malicious SQL queries. This vulnerability can be exploited remotely, leading to unauthorized database access, data manipulation, and potential leakage of sensitive information.

Impact

Exploitation of this vulnerability allows for unauthorized access to the database, manipulation or deletion of data, and access to sensitive information. Such actions pose a significant threat to the overall security of the system and the integrity of its data.

Reproduction

The vulnerability can be reproduced by sending a POST request to '/ajax.php?action=delete_sales' with a crafted 'id' parameter that includes malicious SQL payloads. This injection exploits the application's failure to properly sanitize user input, allowing for manipulation of the SQL query execution.

Remediation

To address this vulnerability, it is recommended to implement prepared statements and parameter binding to prevent SQL injection. Additionally, input validation and filtering should be applied to ensure user data conforms to expected formats. Minimizing database user permissions and conducting regular security audits can further enhance the application's security.