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Fix 2FA/sign-in token sessions being valid after password change (#14802) 

If someone tries logging in to an account and is prompted for a 2FA
code or sign-in token, even if the account's password or e-mail is
updated in the meantime, the session will show the prompt and allow
the login process to complete with a valid 2FA code or sign-in token
gh/stable
Eugen Rochko 2020-11-12 23:05:01 +01:00 committed by GitHub
parent 9870b175b4
commit 8532429af7
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GPG Key ID: 4AEE18F83AFDEB23
7 changed files with 78 additions and 40 deletions
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2
app/controllers/api/base_controller.rb
View File

@ -103,7 +103,7 @@ class Api::BaseController < ApplicationController
elsif !current_user.functional?
render json: { error: 'Your login is currently disabled' }, status: 403
else
set_user_activity
update_user_sign_in
end
end

22
app/controllers/auth/sessions_controller.rb
View File

@ -7,6 +7,7 @@ class Auth::SessionsController < Devise::SessionsController
skip_before_action :require_no_authentication, only: [:create]
skip_before_action :require_functional!
skip_before_action :update_user_sign_in
include TwoFactorAuthenticationConcern
include SignInTokenAuthenticationConcern
@ -24,6 +25,7 @@ class Auth::SessionsController < Devise::SessionsController
def create
super do |resource|
resource.update_sign_in!(request, new_sign_in: true)
remember_me(resource)
flash.delete(:notice)
end
@ -57,7 +59,7 @@ class Auth::SessionsController < Devise::SessionsController
def find_user
if session[:attempt_user_id]
User.find(session[:attempt_user_id])
User.find_by(id: session[:attempt_user_id])
else
user = User.authenticate_with_ldap(user_params) if Devise.ldap_authentication
user ||= User.authenticate_with_pam(user_params) if Devise.pam_authentication
@ -90,6 +92,7 @@ class Auth::SessionsController < Devise::SessionsController
def require_no_authentication
super
# Delete flash message that isn't entirely useful and may be confusing in
# most cases because /web doesn't display/clear flash messages.
flash.delete(:alert) if flash[:alert] == I18n.t('devise.failure.already_authenticated')
@ -107,13 +110,30 @@ class Auth::SessionsController < Devise::SessionsController
def home_paths(resource)
paths = [about_path]
if single_user_mode? && resource.is_a?(User)
paths << short_account_path(username: resource.account)
end
paths
end
def continue_after?
truthy_param?(:continue)
end
def restart_session
clear_attempt_from_session
redirect_to new_user_session_path, alert: I18n.t('devise.failure.timeout')
end
def set_attempt_session(user)
session[:attempt_user_id] = user.id
session[:attempt_user_updated_at] = user.updated_at.to_s
end
def clear_attempt_from_session
session.delete(:attempt_user_id)
session.delete(:attempt_user_updated_at)
end
end

14
app/controllers/concerns/sign_in_token_authentication_concern.rb
View File

@ -18,7 +18,9 @@ module SignInTokenAuthenticationConcern
def authenticate_with_sign_in_token
user = self.resource = find_user
if user_params[:sign_in_token_attempt].present? && session[:attempt_user_id]
if user.present? && session[:attempt_user_id].present? && session[:attempt_user_updated_at] != user.updated_at.to_s
restart_session
elsif user_params.key?(:sign_in_token_attempt) && session[:attempt_user_id]
authenticate_with_sign_in_token_attempt(user)
elsif user.present? && user.external_or_valid_password?(user_params[:password])
prompt_for_sign_in_token(user)
@ -27,7 +29,7 @@ module SignInTokenAuthenticationConcern
def authenticate_with_sign_in_token_attempt(user)
if valid_sign_in_token_attempt?(user)
session.delete(:attempt_user_id)
clear_attempt_from_session
remember_me(user)
sign_in(user)
else
@ -42,10 +44,10 @@ module SignInTokenAuthenticationConcern
UserMailer.sign_in_token(user, request.remote_ip, request.user_agent, Time.now.utc.to_s).deliver_later!
end
set_locale do
session[:attempt_user_id] = user.id
set_attempt_session(user)
@body_classes = 'lighter'
render :sign_in_token
end
set_locale { render :sign_in_token }
end
end

22
app/controllers/concerns/two_factor_authentication_concern.rb
View File

@ -37,9 +37,11 @@ module TwoFactorAuthenticationConcern
def authenticate_with_two_factor
user = self.resource = find_user
if user.webauthn_enabled? && user_params[:credential].present? && session[:attempt_user_id]
if user.present? && session[:attempt_user_id].present? && session[:attempt_user_updated_at] != user.updated_at.to_s
restart_session
elsif user.webauthn_enabled? && user_params.key?(:credential) && session[:attempt_user_id]
authenticate_with_two_factor_via_webauthn(user)
elsif user_params[:otp_attempt].present? && session[:attempt_user_id]
elsif user_params.key?(:otp_attempt) && session[:attempt_user_id]
authenticate_with_two_factor_via_otp(user)
elsif user.present? && user.external_or_valid_password?(user_params[:password])
prompt_for_two_factor(user)
@ -50,7 +52,7 @@ module TwoFactorAuthenticationConcern
webauthn_credential = WebAuthn::Credential.from_get(user_params[:credential])
if valid_webauthn_credential?(user, webauthn_credential)
session.delete(:attempt_user_id)
clear_attempt_from_session
remember_me(user)
sign_in(user)
render json: { redirect_path: root_path }, status: :ok
@ -61,7 +63,7 @@ module TwoFactorAuthenticationConcern
def authenticate_with_two_factor_via_otp(user)
if valid_otp_attempt?(user)
session.delete(:attempt_user_id)
clear_attempt_from_session
remember_me(user)
sign_in(user)
else
@ -71,16 +73,18 @@ module TwoFactorAuthenticationConcern
end
def prompt_for_two_factor(user)
set_locale do
session[:attempt_user_id] = user.id
set_attempt_session(user)
@body_classes = 'lighter'
@webauthn_enabled = user.webauthn_enabled?
@scheme_type = if user.webauthn_enabled? && user_params[:otp_attempt].blank?
@scheme_type = begin
if user.webauthn_enabled? && user_params[:otp_attempt].blank?
'webauthn'
else
'totp'
end
render :two_factor
end
end
set_locale { render :two_factor }
end
end

7
app/controllers/concerns/user_tracking_concern.rb
View File

@ -6,14 +6,13 @@ module UserTrackingConcern
UPDATE_SIGN_IN_HOURS = 24
included do
before_action :set_user_activity
before_action :update_user_sign_in
end
private
def set_user_activity
return unless user_needs_sign_in_update?
current_user.update_tracked_fields!(request)
def update_user_sign_in
current_user.update_sign_in!(request) if user_needs_sign_in_update?
end
def user_needs_sign_in_update?

25
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, :trackable, :validatable,
devise :registerable, :recoverable, :rememberable, :validatable,
:confirmable
include Omniauthable
@ -165,6 +165,24 @@ class User < ApplicationRecord
prepare_new_user! if new_user && approved?
end
def update_sign_in!(request, new_sign_in: false)
old_current, new_current = current_sign_in_at, Time.now.utc
self.last_sign_in_at = old_current || new_current
self.current_sign_in_at = new_current
old_current, new_current = current_sign_in_ip, request.remote_ip
self.last_sign_in_ip = old_current || new_current
self.current_sign_in_ip = new_current
if new_sign_in
self.sign_in_count ||= 0
self.sign_in_count += 1
end
save(validate: false) unless new_record?
prepare_returning_user!
end
def pending?
!approved?
end
@ -196,11 +214,6 @@ class User < ApplicationRecord
prepare_new_user!
end
def update_tracked_fields!(request)
super
prepare_returning_user!
end
def otp_enabled?
otp_required_for_login
end

14
spec/controllers/auth/sessions_controller_spec.rb
View File

@ -219,7 +219,7 @@ RSpec.describe Auth::SessionsController, type: :controller do
context 'using a valid OTP' do
before do
post :create, params: { user: { otp_attempt: user.current_otp } }, session: { attempt_user_id: user.id }
post :create, params: { user: { otp_attempt: user.current_otp } }, session: { attempt_user_id: user.id, attempt_user_updated_at: user.updated_at.to_s }
end
it 'redirects to home' do
@ -234,7 +234,7 @@ RSpec.describe Auth::SessionsController, type: :controller do
context 'when the server has an decryption error' do
before do
allow_any_instance_of(User).to receive(:validate_and_consume_otp!).and_raise(OpenSSL::Cipher::CipherError)
post :create, params: { user: { otp_attempt: user.current_otp } }, session: { attempt_user_id: user.id }
post :create, params: { user: { otp_attempt: user.current_otp } }, session: { attempt_user_id: user.id, attempt_user_updated_at: user.updated_at.to_s }
end
it 'shows a login error' do
@ -248,7 +248,7 @@ RSpec.describe Auth::SessionsController, type: :controller do
context 'using a valid recovery code' do
before do
post :create, params: { user: { otp_attempt: recovery_codes.first } }, session: { attempt_user_id: user.id }
post :create, params: { user: { otp_attempt: recovery_codes.first } }, session: { attempt_user_id: user.id, attempt_user_updated_at: user.updated_at.to_s }
end
it 'redirects to home' do
@ -262,7 +262,7 @@ RSpec.describe Auth::SessionsController, type: :controller do
context 'using an invalid OTP' do
before do
post :create, params: { user: { otp_attempt: 'wrongotp' } }, session: { attempt_user_id: user.id }
post :create, params: { user: { otp_attempt: 'wrongotp' } }, session: { attempt_user_id: user.id, attempt_user_updated_at: user.updated_at.to_s }
end
it 'shows a login error' do
@ -334,7 +334,7 @@ RSpec.describe Auth::SessionsController, type: :controller do
before do
@controller.session[:webauthn_challenge] = challenge
post :create, params: { user: { credential: fake_credential } }, session: { attempt_user_id: user.id }
post :create, params: { user: { credential: fake_credential } }, session: { attempt_user_id: user.id, attempt_user_updated_at: user.updated_at.to_s }
end
it 'instructs the browser to redirect to home' do
@ -383,7 +383,7 @@ RSpec.describe Auth::SessionsController, type: :controller do
context 'using a valid sign in token' do
before do
user.generate_sign_in_token && user.save
post :create, params: { user: { sign_in_token_attempt: user.sign_in_token } }, session: { attempt_user_id: user.id }
post :create, params: { user: { sign_in_token_attempt: user.sign_in_token } }, session: { attempt_user_id: user.id, attempt_user_updated_at: user.updated_at.to_s }
end
it 'redirects to home' do
@ -397,7 +397,7 @@ RSpec.describe Auth::SessionsController, type: :controller do
context 'using an invalid sign in token' do
before do
post :create, params: { user: { sign_in_token_attempt: 'wrongotp' } }, session: { attempt_user_id: user.id }
post :create, params: { user: { sign_in_token_attempt: 'wrongotp' } }, session: { attempt_user_id: user.id, attempt_user_updated_at: user.updated_at.to_s }
end
it 'shows a login error' do