Class: Msf::Exploit::Remote::HTTP::Kubernetes::Client

Inherits:
Object
  • Object
show all
Defined in:
lib/msf/core/exploit/remote/http/kubernetes/client.rb

Defined Under Namespace

Classes: ExecChannel

Constant Summary collapse

USER_AGENT =
'kubectl/v1.22.2 (linux/amd64) kubernetes/8b5a191'.freeze

Instance Method Summary collapse

Constructor Details

#initialize(config) ⇒ Client

Returns a new instance of Client.


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# File 'lib/msf/core/exploit/remote/http/kubernetes/client.rb', line 45

def initialize(config)
  @http_client = config.fetch(:http_client)
  @token = config[:token]
end

Instance Method Details

#create_pod(data, namespace, options = {}) ⇒ Object


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# File 'lib/msf/core/exploit/remote/http/kubernetes/client.rb', line 225

def create_pod(data, namespace, options = {})
  res, json = call_api(
    {
      'method' => 'POST',
      'uri' => http_client.normalize_uri("/api/v1/namespaces/#{namespace}/pods"),
      'data' => JSON.pretty_generate(data)
    },
    options
  )

  if res.code != 201
    raise Kubernetes::Error::UnexpectedStatusCode, res: res
  end

  json
end

#delete_pod(name, namespace, options = {}) ⇒ Object


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# File 'lib/msf/core/exploit/remote/http/kubernetes/client.rb', line 242

def delete_pod(name, namespace, options = {})
  _res, json = call_api(
    {
      'method' => 'DELETE',
      'uri' => http_client.normalize_uri("/api/v1/namespaces/#{namespace}/pods/#{name}"),
      'headers' => {}
    },
    options
  )

  json
end

#exec_pod(name, namespace, command, options = {}) ⇒ Object

rubocop:disable Style/DoubleNegation


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# File 'lib/msf/core/exploit/remote/http/kubernetes/client.rb', line 51

def exec_pod(name, namespace, command, options = {})
  options = {
    'stdin' => false,
    'stdout' => false,
    'stderr' => false,
    'tty' => false
  }.merge(options)

  # while kubectl uses SPDY/3.1, the Python client uses WebSockets over HTTP/1.1
  # see: https://github.com/kubernetes/kubernetes/issues/7452
  websocket = http_client.connect_ws(
    request_options(
      {
        'method' => 'GET',
        'uri' => http_client.normalize_uri("/api/v1/namespaces/#{namespace}/pods/#{name}/exec"),
        'query' => URI.encode_www_form(
          {
            'command' => command,
            'stdin' => !!options.delete('stdin'),
            'stdout' => !!options.delete('stdout'),
            'stderr' => !!options.delete('stderr'),
            'tty' => !!options.delete('tty')
          }
        ),
        'headers' => {
          'Sec-Websocket-Protocol' => 'v4.channel.k8s.io'
        }
      },
      options
    )
  )

  websocket
end

#exec_pod_capture(name, namespace, command, options = {}, &block) ⇒ Object

rubocop:enable Style/DoubleNegation


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# File 'lib/msf/core/exploit/remote/http/kubernetes/client.rb', line 87

def exec_pod_capture(name, namespace, command, options = {}, &block)
  websocket = exec_pod(name, namespace, command, options)
  return nil if websocket.nil?

  result = { error: {}, stdout: '', stderr: '' }
  websocket.wsloop do |channel_data, _data_type|
    next if channel_data.blank?

    channel = channel_data[0].ord
    channel_data = channel_data[1..-1]
    case channel
    when EXEC_CHANNEL_STDOUT
      result[:stdout] << channel_data
      block.call(channel_data, nil) if block_given?
    when EXEC_CHANNEL_STDERR
      result[:stderr] << channel_data
      block.call(nil, channel_data) if block_given?
    when EXEC_CHANNEL_ERROR
      result[:error] = JSON(channel_data)
    end
  end

  result
end

#get_namespace(namespace, options = {}) ⇒ Object


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# File 'lib/msf/core/exploit/remote/http/kubernetes/client.rb', line 189

def get_namespace(namespace, options = {})
  _res, json = call_api(
    {
      'method' => 'GET',
      'uri' => http_client.normalize_uri("/api/v1/namespaces/#{namespace}")
    },
    options
  )

  json
end

#get_pod(pod, namespace, options = {}) ⇒ Object


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# File 'lib/msf/core/exploit/remote/http/kubernetes/client.rb', line 124

def get_pod(pod, namespace, options = {})
  _res, json = call_api(
    {
      'method' => 'GET',
      'uri' => http_client.normalize_uri("/api/v1/namespaces/#{namespace}/pods/#{pod}")
    },
    options
  )

  json
end

#get_secret(secret, namespace, options = {}) ⇒ Object


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# File 'lib/msf/core/exploit/remote/http/kubernetes/client.rb', line 165

def get_secret(secret, namespace, options = {})
  _res, json = call_api(
    {
      'method' => 'GET',
      'uri' => http_client.normalize_uri("/api/v1/namespaces/#{namespace}/secrets/#{secret}")
    },
    options
  )

  json
end

#get_version(options = {}) ⇒ Object


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# File 'lib/msf/core/exploit/remote/http/kubernetes/client.rb', line 112

def get_version(options = {})
  _res, json = call_api(
    {
      'method' => 'GET',
      'uri' => http_client.normalize_uri("/version")
    },
    options
  )

  json
end

#list_auth(namespace, options = {}) ⇒ Object


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# File 'lib/msf/core/exploit/remote/http/kubernetes/client.rb', line 136

def list_auth(namespace, options = {})
  data = {
    kind: "SelfSubjectRulesReview",
    "apiVersion": "authorization.k8s.io/v1",
    "metadata": {
      "creationTimestamp": nil
    },
    "spec": {
      "namespace": namespace
    },
    "status": {
      "resourceRules": nil,
      "nonResourceRules": nil,
      "incomplete": false
    }
  }

  _res, json = call_api(
    {
      'method' => 'POST',
      'uri' => http_client.normalize_uri('/apis/authorization.k8s.io/v1/selfsubjectrulesreviews'),
      'data' => JSON.pretty_generate(data)
    },
    options
  )

  json
end

#list_namespaces(options = {}) ⇒ Object


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# File 'lib/msf/core/exploit/remote/http/kubernetes/client.rb', line 201

def list_namespaces(options = {})
  _res, json = call_api(
    {
      'method' => 'GET',
      'uri' => http_client.normalize_uri('/api/v1/namespaces')
    },
    options
  )

  json
end

#list_pods(namespace, options = {}) ⇒ Object


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# File 'lib/msf/core/exploit/remote/http/kubernetes/client.rb', line 213

def list_pods(namespace, options = {})
  _res, json = call_api(
    {
      'method' => 'GET',
      'uri' => http_client.normalize_uri("/api/v1/namespaces/#{namespace}/pods")
    },
    options
  )

  json
end

#list_secrets(namespace, options = {}) ⇒ Object


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# File 'lib/msf/core/exploit/remote/http/kubernetes/client.rb', line 177

def list_secrets(namespace, options = {})
  _res, json = call_api(
    {
      'method' => 'GET',
      'uri' => http_client.normalize_uri("/api/v1/namespaces/#{namespace}/secrets")
    },
    options
  )

  json
end