Campcodes Sales and Inventory System SQL Injection Vulnerability in Cash Transaction Page

A critical SQL injection vulnerability has been identified in version 1.0 of the Campcodes Sales and Inventory System. The issue resides in the cash_transaction.php file, where the 'cid' parameter is manipulated to inject malicious SQL code. This vulnerability allows attackers to interfere with SQL queries, potentially leading to unauthorized database access, data modification or deletion, and exposure of sensitive information. The vulnerability can be exploited remotely without any authentication.

Impact

Exploitation of this vulnerability allows for SQL injection, enabling attackers to manipulate database queries. This could result in unauthorized data access, data leakage, unauthorized data modification or deletion, and in some cases, could lead to remote code execution.

Reproduction

To reproduce this vulnerability, send a POST request to the 'pages/cash_transaction.php' file with the 'cid' parameter. Include a payload that exploits the SQL injection, such as one that uses 'union select' to extract database information. The injection point can be verified by observing the response, which may indicate successful exploitation, such as returning database details or application data that should not be accessible.

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.