A new security vulnerability has been discovered in Draytek devices, specifically those running firmware versions prior to their respective updated versions mentioned in the Content section. This vulnerability, named CVE-2024-41334, can potentially allow attackers to upload crafted APPE modules from non-official servers, as the affected devices do not utilize certificate verification properly. This could ultimately lead to arbitrary code execution.

Devices affected by CVE-2024-41334 are as follows

1. Draytek Vigor 165/166 (prior to v4.2.6)
2. Draytek Vigor 262/LTE200 (prior to v3.9.8.8)
3. Draytek Vigor 286/2925 (prior to v3.9.7)
4. Draytek Vigor 2862/2926 (prior to v3.9.9.4)
5. Draytek Vigor 2133/2762/2832 (prior to v3.9.8)
6. Draytek Vigor 2135/2765/2766 (prior to v4.4.5.1)
7. Draytek Vigor 2865/2866/2927 (prior to v4.4.5.3)
8. Draytek Vigor 2962/391 (prior to v4.3.2.7)

Draytek Vigor 3912 (prior to v4.3.5.2)

10. Draytek Vigor 2925 (up to v3.9.6)

The Exploit Details

An attacker may exploit the CVE-2024-41334 vulnerability by uploading a crafted APPE module (plug-in, add-on, or extension) designed to execute malicious code. To achieve this, a hacker would need to intercept the communication between the device and Draytek's servers and inject the crafted APPE module.

Here's an example of a code snippet, which demonstrates how a hacker would intercept the connection and replace the original update package with a crafted one:

'''python
import socket

if update_package_url in request

connection.send(b'HTTP/1.1 200 OK\r\n')
connection.send(b'Content-Type: application/octet-stream\r\n')

s.close()

intercept_and_replace('', '')
'''

Important Note: The provided code snippet is for educational purposes only and should not be used maliciously.

How to Protect Draytek Devices

To protect your Draytek devices from CVE-2024-41334 vulnerability, you will need to update the firmware to the latest version. The firmware updates can be found on Draytek's official download page: Draytek Firmware Downloads

References and Additional Information

For more information about this CVE-2024-41334 vulnerability and its repercussions, you may visit the original reference sources:

1. CVE-2024-41334: Draytek Devices Security Vulnerability
2. Draytek Official Firmware Updates

Please ensure to take the necessary steps to secure your Draytek devices from CVE-2024-41334 and future vulnerabilities. Stay informed about the latest threats and security best practices by regularly following trusted sources.

Timeline

Published on: 02/27/2025 21:15:36 UTC
Last modified on: 05/06/2025 18:15:36 UTC