PHPGurukul Company Visitor Management System SQL Injection Vulnerability

A critical SQL injection vulnerability has been identified in PHPGurukul Company Visitor Management System version 2.0. The issue resides in the '/visitors-form.php' file, where the 'fullname' parameter can be manipulated to inject malicious SQL queries. This vulnerability can be exploited remotely, without any authentication, allowing attackers to access and manipulate the database, potentially leading to unauthorized data access, data modification or deletion, and disruption of services.

Impact

Exploitation of this vulnerability allows for unauthorized database access via the web application, where attackers can manipulate SQL queries to extract, modify, or delete data. This could lead to unauthorized access to sensitive information, disruption of database services, and in some cases, execution of administrative operations on the database.

Reproduction

The vulnerability can be reproduced by sending a POST request to '/cvms/visitors-form.php' with the 'fullname' parameter crafted to include a malicious SQL payload. This can be done using tools 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. Additionally, input validation and filtering should be implemented to ensure that user input conforms to expected formats, blocking malicious data. Finally, database user permissions should be minimized, ensuring that the account used to connect to the database has only the necessary privileges.