SourceCodester Best House Rental Management System SQL Injection Vulnerability

A SQL injection vulnerability has been identified in SourceCodester Best House Rental Management System version 1.0. The issue arises in the 'save_tenant' function within the '/admin_class.php' file, where the 'firstname' parameter is manipulated to inject malicious SQL queries. This vulnerability can be exploited remotely, potentially affecting other parameters as well.

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 disruption of services.

Reproduction

The vulnerability can be reproduced by sending a POST request to the '/ajax.php?action=save_tenant' endpoint. The 'firstname' parameter should be crafted to include a SQL injection payload, such as a boolean-based or time-based blind SQL injection vector. This can be done using a tool like sqlmap, which automates the process of finding and exploiting SQL injection vulnerabilities.

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.