SourceCodester Water Billing System SQL Injection Vulnerability in paybill.php

A SQL injection vulnerability has been identified in SourceCodester Water Billing System version 1.0. The issue resides in the paybill.php file, where the ID 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

To reproduce this vulnerability, send a request to paybill.php with a crafted ID parameter that includes malicious SQL code. The injection point can be verified using SQL injection testing tools such as sqlmap, which can automate the exploitation process and extract database information.

Remediation

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 mitigate such vulnerabilities.