Module: Msf::Exploit::Remote::Kerberos::ServiceAuthenticator::Options

Included in:
HttpClient, LDAP, MSSQL, SMB::Client::Authenticated, WinRM, Rex::Proto::MSSQL::Client
Defined in:
lib/msf/core/exploit/remote/kerberos/service_authenticator/options.rb

Instance Method Summary collapse

Instance Method Details

#kerberos_auth_options(protocol:, auth_methods:) ⇒ Object

Create the list of options that a module must provide for Kerberos authentication via the given protocol This method exists for ensuring consistency across service authentication modules

Parameters:

  • protocol (String) —

    The service protocol type, i.e. smb/ldap/winrm/mssql

  • auth_methods (Array<String>) —

    The allowed auth methods

See Also:

  • Msf::Exploit::Remote::Kerberos::ServiceAuthenticator::Options::Msf::Exploit::Remote::AuthOption


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# File 'lib/msf/core/exploit/remote/kerberos/service_authenticator/options.rb', line 15

def kerberos_auth_options(protocol:, auth_methods:)
  option_conditions = ["#{protocol}::Auth", '==', 'kerberos']

  etype_regex = "(#{Msf::Exploit::Remote::AuthOption::KERBEROS_DEFAULT_OFFERED_ENC_TYPES.map { |v| Regexp.escape(v) }.join('|')})"
  offered_enc_types_option = Msf::OptString.new(
    "#{protocol}::KrbOfferedEncryptionTypes",
    [
      true,
      'Kerberos encryption types to offer',
      Msf::Exploit::Remote::AuthOption::KERBEROS_DEFAULT_OFFERED_ENC_TYPES.join(',')
    ],
    regex: Regexp.new("(#{etype_regex},)*#{etype_regex}", Regexp::IGNORECASE),
    conditions: option_conditions
  )

  auth_options = [
    Msf::OptEnum.new(
      "#{protocol}::Auth",
      [true, 'The Authentication mechanism to use', Msf::Exploit::Remote::AuthOption::AUTO, auth_methods],
    ),
    Msf::OptString.new(
      "#{protocol}::Rhostname",
      [false, 'The rhostname which is required for kerberos - the SPN'],
      fallbacks: ['Rhostname'],
      conditions: option_conditions
    ),
    Msf::OptString.new(
      'KrbClockSkew',
      [true, 'Adjust Kerberos client clock by this offset (e.g. 90s, -5m, 1h)', '0s'],
      regex: Msf::Exploit::Remote::Kerberos::ClockSkew::CLOCK_SKEW_REGEX,
      conditions: option_conditions
    ),
    Msf::OptAddress.new(
      'DomainControllerRhost',
      [false, 'The resolvable rhost for the Domain Controller'],
      conditions: option_conditions
    ),
    Msf::OptKerberosCredentialCache.new(
      "#{protocol}::Krb5Ccname",
      [false, 'The ccache file to use for kerberos authentication', nil],
      conditions: option_conditions
    )
  ]

  [
    *auth_options,
    offered_enc_types_option
  ]
end

#kerberos_clock_skew_seconds ⇒ Float

Parse the configured Kerberos clock skew into seconds.

Returns:

  • (Float) 


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# File 'lib/msf/core/exploit/remote/kerberos/service_authenticator/options.rb', line 68

def kerberos_clock_skew_seconds
  Msf::Exploit::Remote::Kerberos::ClockSkew.parse(datastore['KrbClockSkew'])
end