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Fix reviving revoked sessions and invalidating login (#16943)

Up until now, we have used Devise's Rememberable mechanism to re-log users
after the end of their browser sessions. This mechanism relies on a signed
cookie containing a token. That token was stored on the user's record,
meaning it was shared across all logged in browsers, meaning truly revoking
a browser's ability to auto-log-in involves revoking the token itself, and
revoking access from *all* logged-in browsers.

We had a session mechanism that dynamically checks whether a user's session
has been disabled, and would log out the user if so. However, this would only
clear a session being actively used, and a new one could be respawned with
the `remember_user_token` cookie.

In practice, this caused two issues:
- sessions could be revived after being closed from /auth/edit (security issue)
- auto-log-in would be disabled for *all* browsers after logging out from one
  of them

This PR removes the `remember_token` mechanism and treats the `_session_id`
cookie/token as a browser-specific `remember_token`, fixing both issues.
closed-social-v3
Claire 9 months ago
committed by Eugen Rochko
parent
commit
3251b8eead
5 changed files with 37 additions and 10 deletions
  1. +0
    -1
      app/controllers/auth/passwords_controller.rb
  2. +0
    -3
      app/controllers/auth/registrations_controller.rb
  3. +0
    -2
      app/controllers/auth/sessions_controller.rb
  4. +1
    -1
      app/models/user.rb
  5. +36
    -3
      config/initializers/devise.rb

+ 0
- 1
app/controllers/auth/passwords_controller.rb View File

@ -10,7 +10,6 @@ class Auth::PasswordsController < Devise::PasswordsController
super do |resource|
if resource.errors.empty?
resource.session_activations.destroy_all
resource.forget_me!
end
end
end

+ 0
- 3
app/controllers/auth/registrations_controller.rb View File

@ -1,7 +1,6 @@
# frozen_string_literal: true
class Auth::RegistrationsController < Devise::RegistrationsController
include Devise::Controllers::Rememberable
include RegistrationSpamConcern
layout :determine_layout
@ -30,8 +29,6 @@ class Auth::RegistrationsController < Devise::RegistrationsController
super do |resource|
if resource.saved_change_to_encrypted_password?
resource.clear_other_sessions(current_session.session_id)
resource.forget_me!
remember_me(resource)
end
end
end

+ 0
- 2
app/controllers/auth/sessions_controller.rb View File

@ -1,8 +1,6 @@
# frozen_string_literal: true
class Auth::SessionsController < Devise::SessionsController
include Devise::Controllers::Rememberable
layout 'auth'
skip_before_action :require_no_authentication, only: [:create]

+ 1
- 1
app/models/user.rb View File

@ -63,7 +63,7 @@ class User < ApplicationRecord
devise :two_factor_backupable,
otp_number_of_backup_codes: 10
devise :registerable, :recoverable, :rememberable, :validatable,
devise :registerable, :recoverable, :validatable,
:confirmable
include Omniauthable

+ 36
- 3
config/initializers/devise.rb View File

@ -1,3 +1,5 @@
require 'devise/strategies/authenticatable'
Warden::Manager.after_set_user except: :fetch do |user, warden|
if user.session_active?(warden.cookies.signed['_session_id'] || warden.raw_session['auth_id'])
session_id = warden.cookies.signed['_session_id'] || warden.raw_session['auth_id']
@ -72,17 +74,48 @@ module Devise
mattr_accessor :ldap_uid_conversion_replace
@@ldap_uid_conversion_replace = nil
class Strategies::PamAuthenticatable
def valid?
super && ::Devise.pam_authentication
module Strategies
class PamAuthenticatable
def valid?
super && ::Devise.pam_authentication
end
end
class SessionActivationRememberable < Authenticatable
def valid?
@session_cookie = nil
session_cookie.present?
end
def authenticate!
resource = SessionActivation.find_by(session_id: session_cookie)&.user
unless resource
cookies.delete('_session_id')
return pass
end
if validate(resource)
success!(resource)
end
end
private
def session_cookie
@session_cookie ||= cookies.signed['_session_id']
end
end
end
end
Warden::Strategies.add(:session_activation_rememberable, Devise::Strategies::SessionActivationRememberable)
Devise.setup do |config|
config.warden do |manager|
manager.default_strategies(scope: :user).unshift :two_factor_ldap_authenticatable if Devise.ldap_authentication
manager.default_strategies(scope: :user).unshift :two_factor_pam_authenticatable if Devise.pam_authentication
manager.default_strategies(scope: :user).unshift :session_activation_rememberable
manager.default_strategies(scope: :user).unshift :two_factor_authenticatable
manager.default_strategies(scope: :user).unshift :two_factor_backupable
end

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