Module: Msf::Exploit::Remote::Java::Rmi::Client::Jmx::Connection

Includes:
Builder
Included in:
Msf::Exploit::Remote::Java::Rmi::Client::Jmx
Defined in:
lib/msf/core/exploit/remote/java/rmi/client/jmx/connection.rb,
lib/msf/core/exploit/remote/java/rmi/client/jmx/connection/builder.rb

Overview

This mixin provides methods to simulate calls to the Java javax/management/remote/rmi/RMIConnectionImpl_Stub interface

Defined Under Namespace

Modules: Builder

Instance Method Summary collapse

Methods included from Builder

#build_jmx_create_mbean, #build_jmx_create_mbean_args, #build_jmx_get_object_instance, #build_jmx_get_object_instance_args

Instance Method Details

#build_invoke_arguments_obj_bytes(args = {}) ⇒ Rex::Java::Serialization::Model::Stream

Builds a Rex::Java::Serialization::Model::Stream with the arguments to simulate a call to the Java javax/management/remote/rmi/RMIConnectionImpl_Stub#invoke() method.

Parameters:

  • args (Hash) (defaults to: {})

    the arguments of the method to invoke

Returns:

  • (Rex::Java::Serialization::Model::Stream)

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# File 'lib/msf/core/exploit/remote/java/rmi/client/jmx/connection/builder.rb', line 215

def build_invoke_arguments_obj_bytes(args = {})
  builder = Rex::Java::Serialization::Builder.new

  new_array = builder.new_array(
    name: '[Ljava.lang.Object;',
    serial: Msf::Exploit::Remote::Java::Rmi::Client::Jmx::OBJECT_ARRAY_UID, # serialVersionUID
    annotations: [Rex::Java::Serialization::Model::EndBlockData.new],
    values_type: 'java.lang.Object;',
    values: args.values.collect { |arg| Rex::Java::Serialization::Model::Utf.new(nil, arg) }
  )

  stream = Rex::Java::Serialization::Model::Stream.new
  stream.contents << new_array

  stream
end

#build_jmx_invoke(opts = {}) ⇒ Rex::Proto::Rmi::Model::Call

Builds an RMI call to javax/management/remote/rmi/RMIConnectionImpl_Stub#invoke() used to invoke an MBean method

Parameters:

  • opts (Hash) (defaults to: {})

Options Hash (opts):

  • :name (String)

    the MBean name

Returns:

See Also:


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# File 'lib/msf/core/exploit/remote/java/rmi/client/jmx/connection/builder.rb', line 123

def build_jmx_invoke(opts = {})
  object_number = opts[:object_number] || 0
  uid_number = opts[:uid_number] || 0
  uid_time = opts[:uid_time] || 0
  uid_count = opts[:uid_count] || 0

  method_hash = calculate_method_hash('invoke(Ljavax/management/ObjectName;Ljava/lang/String;Ljava/rmi/MarshalledObject;[Ljava/lang/String;Ljavax/security/auth/Subject;)Ljava/lang/Object;')

  arguments = build_jmx_invoke_args(opts)

  call = build_call(
    object_number: object_number,
    uid_number: uid_number,
    uid_time: uid_time,
    uid_count: uid_count,
    operation: -1,
    hash: method_hash,
    arguments: arguments
  )

  call
end

#build_jmx_invoke_args(opts = {}) ⇒ Array

Builds an an array of arguments o build a call to javax/management/remote/rmi/RMIConnectionImpl_Stub#invoke()

Parameters:

  • opts (Hash) (defaults to: {})

Options Hash (opts):

  • :object (String)

    the MBean name

  • :method (String)

    the method name

  • :args (Hash)

    the method arguments

Returns:

  • (Array)

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# File 'lib/msf/core/exploit/remote/java/rmi/client/jmx/connection/builder.rb', line 154

def build_jmx_invoke_args(opts = {})
  object_name = opts[:object] || ''
  method_name = opts[:method] || ''
  args = opts[:args] || {}

  builder = Rex::Java::Serialization::Builder.new

  new_object = builder.new_object(
    name: 'javax.management.ObjectName',
    serial: Msf::Exploit::Remote::Java::Rmi::Client::Jmx::OBJECT_NAME_UID, # serialVersionUID
    flags: 3
  )

  data_binary = builder.new_array(
    name: '[B',
    serial: Msf::Exploit::Remote::Java::Rmi::Client::Jmx::BYTE_ARRAY_UID, # serialVersionUID
    values_type: 'byte',
    values: build_invoke_arguments_obj_bytes(args).encode.unpack('C*')
  )

  marshall_object = builder.new_object(
    name: 'java.rmi.MarshalledObject',
    serial: Msf::Exploit::Remote::Java::Rmi::Client::Jmx::MARSHALLED_OBJECT_UID, # serialVersionUID
    fields: [
      ['int', 'hash'],
      ['array', 'locBytes', '[B'],
      ['array', 'objBytes', '[B']
    ],
    data: [
      ["int", 1919492550],
      Rex::Java::Serialization::Model::NullReference.new,
      data_binary
    ]
  )

  new_array = builder.new_array(
    name: '[Ljava.lang.String;',
    serial: Msf::Exploit::Remote::Java::Rmi::Client::Jmx::STRING_ARRAY_UID, # serialVersionUID
    values_type: 'java.lang.String;',
    values: args.keys.collect { |k| Rex::Java::Serialization::Model::Utf.new(nil, k) }
  )

  arguments = [
    new_object,
    Rex::Java::Serialization::Model::Utf.new(nil, object_name),
    Rex::Java::Serialization::Model::EndBlockData.new,
    Rex::Java::Serialization::Model::Utf.new(nil, method_name),
    marshall_object,
    new_array,
    Rex::Java::Serialization::Model::NullReference.new
  ]

  arguments
end

#send_jmx_create_mbean(opts = {}) ⇒ TrueClass, NilClass

Sends a call to the JMXRMI endpoint to create an MBean instance. Simulates a call to the Java javax/management/remote/rmi/RMIConnectionImpl_Stub#createMBean() method.

Parameters:

  • opts (Hash) (defaults to: {})

Options Hash (opts):

  • :sock (Rex::Socket::Tcp)

Returns:

  • (TrueClass, NilClass)

    true if success, nil otherwise

Raises:

See Also:

  • Registry::Builder.build_jmx_create_mbean

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# File 'lib/msf/core/exploit/remote/java/rmi/client/jmx/connection.rb', line 61

def send_jmx_create_mbean(opts = {})
  send_call(
    sock: opts[:sock] || sock,
    call: build_jmx_create_mbean(opts)
  )

  return_value = recv_return(
    sock: opts[:sock] || sock
  )

  if return_value.nil?
    return nil
  end

  if return_value.is_exception?
    raise ::Rex::Proto::Rmi::Exception, return_value.get_class_name
  end

  unless return_value.get_class_name == 'javax.management.ObjectInstance'
    return nil
  end

  true
end

#send_jmx_get_object_instance(opts = {}) ⇒ TrueClass, NilClass

Sends a call to the JMXRMI endpoint to retrieve an MBean instance. Simulates a call to the Java javax/management/remote/rmi/RMIConnectionImpl_Stub#getObjectInstance() method.

Parameters:

  • opts (Hash) (defaults to: {})

Options Hash (opts):

  • :sock (Rex::Socket::Tcp)

Returns:

  • (TrueClass, NilClass)

    true if success, nil otherwise

Raises:

See Also:

  • Registry::Builder.build_jmx_get_object_instance

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# File 'lib/msf/core/exploit/remote/java/rmi/client/jmx/connection.rb', line 27

def send_jmx_get_object_instance(opts = {})
  send_call(
    sock: opts[:sock] || sock,
    call: build_jmx_get_object_instance(opts)
  )

  return_value = recv_return(
    sock: opts[:sock] || sock
  )

  if return_value.nil?
    return nil
  end

  if return_value.is_exception?
    raise ::Rex::Proto::Rmi::Exception, return_value.get_class_name
  end

  unless return_value.get_class_name == 'javax.management.ObjectInstance'
    return nil
  end

  true
end

#send_jmx_invoke(opts = {}) ⇒ TrueClass, NilClass

Sends a call to the JMXRMI endpoint to invoke an MBean method. Simulates a call to the Java javax/management/remote/rmi/RMIConnectionImpl_Stub#invoke() method.

Parameters:

  • opts (Hash) (defaults to: {})

Options Hash (opts):

  • :sock (Rex::Socket::Tcp)

Returns:

  • (TrueClass, NilClass)

    true if success, nil otherwise

Raises:

See Also:

  • Registry::Builder.build_jmx_invoke

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# File 'lib/msf/core/exploit/remote/java/rmi/client/jmx/connection.rb', line 95

def send_jmx_invoke(opts = {})
  send_call(
    sock: opts[:sock] || sock,
    call: build_jmx_invoke(opts)
  )

  return_value = recv_return(
    sock: opts[:sock] || sock
  )

  if return_value.nil?
    return nil
  end

  if return_value.is_exception?
    raise ::Rex::Proto::Rmi::Exception, return_value.get_class_name
  end

  unless return_value.get_class_name == 'java.util.HashSet'
    return nil
  end

  true
end