itsourcecode Electronic Judging System SQL Injection Vulnerability in Delete Judge Function

A SQL injection vulnerability has been identified in the itsourcecode Electronic Judging System version 1.0. The issue arises in the '/admin/delete_judge.php' file, where insufficient input validation of the 'judge_id' parameter allows remote attackers to inject malicious SQL queries. This exploitation could lead to unauthorized database access, data manipulation, and potential leakage of sensitive information.

Impact

Exploitation of this vulnerability allows for SQL injection, enabling attackers to interfere with the application's database queries. This could result in unauthorized data access, data modification or deletion, and in some cases, executing administrative operations on the database.

Reproduction

To reproduce this vulnerability, send a request to the '/admin/delete_judge.php' endpoint with a crafted 'judge_id' parameter that includes SQL injection payloads. For example, use '4'or+sleep(2)--+' to test the injection and demonstrate the vulnerability by causing a delay in the response, indicating successful exploitation.

Remediation

To address this vulnerability, it is recommended to use prepared statements and parameter binding to prevent SQL injection. Additionally, implement strict input validation and filtering for user inputs, minimize database user permissions, and conduct regular security audits.