PHPGurukul Teachers Record Management System SQL Injection Vulnerability in Change Image Admin File

A critical SQL injection vulnerability has been identified in PHPGurukul Teachers Record Management System version 2.1. The issue resides in the admin/changeimage.php file, where the tid parameter is manipulated, allowing attackers to inject malicious SQL queries. This vulnerability can be exploited remotely, without any authentication, potentially leading to unauthorized access to the database, data modification or deletion, and leakage of sensitive information.

Impact

Exploitation of this vulnerability allows for unauthorized database access, manipulation or deletion of data, and interception of sensitive information. Such actions could disrupt normal system operations and cause significant harm to business processes.

Reproduction

The vulnerability can be reproduced by sending a GET request to the /admin/changeimage.php file with a crafted tid parameter. This can be done using a web browser or a tool like sqlmap, which automates the process of finding and exploiting SQL injection vulnerabilities. The injection can be verified by using payloads that, for example, delay the response time (time-based blind injection) or extract database information (using UNION-based injection).

Remediation

It is recommended to implement prepared statements and parameter binding to prevent SQL injection. Additionally, input validation and filtering should be applied to ensure that user input meets expected formats, thereby blocking malicious data. Finally, database user permissions should be minimized, granting only the necessary rights to the account used for database connections.