The Sanitization Management System (SMS) v1., a popular software solution for managing cleaning and sanitization services, is vulnerable to SQL injection attacks. This vulnerability (CVE-2022-44295) could allow an attacker to gain unauthorized access to sensitive data or potentially execute arbitrary code. This blog post will discuss the details of the exploit, possible impacts, and provide links to original references and code snippets for further investigation.

Details

The vulnerability has been identified in the assign_team.php file, which is part of the administration module of the Sanitization Management System. An attacker can perform an SQL injection attack by manipulating the "id" parameter and injecting malicious SQL code.

The following code snippet demonstrates the vulnerable code in the /php-sms/admin/orders/assign_team.php file:

<?php
include('../db.php');
$id=$_GET['id'];
$q1="SELECT * FROM orders WHERE id=$id";
$q=mysqli_query($con,$q1);
$data=mysqli_fetch_assoc($q);
?>

As we can see, the "id" parameter is directly used in the SQL query without proper sanitization or validation, making the system susceptible to SQL injection attacks.

Exploit

An attacker could craft a malicious URL containing the injected SQL code to exploit the vulnerability. For example:

http://example.com/php-sms/admin/orders/assign_team.php?id=-1+UNION+SELECT+1,username,password,4,5,6,7+FROM+admin--

In this example, the injected SQL code (-1 UNION SELECT 1,username,password,4,5,6,7 FROM admin--) allows the attacker to retrieve the username and password of the registered administrators.

Mitigation

To mitigate this vulnerability, developers should use prepared statements or parameterized queries when working with user-supplied input data. This practice will protect against SQL injection attacks by ensuring that user input data is correctly escaped and cannot be executed as part of an SQL query.

Here's an example of how the vulnerable code could be modified to use prepared statements

<?php
include('../db.php');
$id = $_GET['id'];

// Check if the input is an integer
if (ctype_digit($id)) {
    // Use prepared statements to prevent SQL injection
    $stmt = $con->prepare("SELECT * FROM orders WHERE id=?");
    $stmt->bind_param('i', $id);
    $stmt->execute();
    $result = $stmt->get_result();
    $data = $result->fetch_assoc();
}
?>

However, this is only one part of managing sanitization and validation in a secure application. Developers are encouraged to adopt a defense-in-depth approach and implement additional security measures like input validation, output escaping, and privilege management, among others.

1. CVE Details
2. National Vulnerability Database
3. OWASP SQL Injection Prevention Cheat Sheet

Conclusion

The discovery of CVE-2022-44295 highlights the importance of securing web applications against SQL injection vulnerabilities. Developers must adhere to best practices for input validation and sanitization to protect their systems and users from potential data breaches and unauthorized access. Stay informed about the latest security vulnerabilities and follow responsible disclosure guidelines to ensure the safety and privacy of user information.

Timeline

Published on: 11/30/2022 18:15:00 UTC
Last modified on: 12/01/2022 02:27:00 UTC