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.
* Add tests
* Add security-related tests
My first (unpublished) attempt at fixing the issues introduced (extremely
hard-to-exploit) security vulnerabilities, addressing them in a test.
* Fix authentication failures after going halfway through a sign-in attempt
* Refactor `authenticate_with_sign_in_token` and `authenticate_with_two_factor` to make the two authentication steps more obvious
The addition of authentication history broke the omniauth login with
the following error:
method=GET path=/auth/auth/cas/callback format=html
controller=Auth::OmniauthCallbacksController action=cas status=500
error='NameError: undefined local variable or method `user' for
#<Auth::OmniauthCallbacksController:0x00000000036290>
Did you mean? @user' duration=435.93 view=0.00 db=36.19
* app/controllers/auth/omniauth_callbacks_controller.rb: fix variable
name to `@user`
Clicking the confirmation link multiple times currently leads to entering
account settings, which can be confusing. This commit changes that so that
it redirects to the root path, so it behaves the same way as clicking only
once in most cases.
* Add honeypot fields to limit non-specialized spam
Add two honeypot fields: a fake website input and a fake password confirmation
one. The label/placeholder/aria-label tells not to fill them, and they are
hidden in CSS, so legitimate users should not fall into these.
This should cut down on some non-Mastodon-specific spambots.
* Require a 3 seconds delay before submitting the registration form
* Fix tests
* Move registration form time check to model validation
* Give people a chance to clear the honeypot fields
* Refactor honeypot translation strings
Co-authored-by: Claire <claire.github-309c@sitedethib.com>
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
* feat: add possibility of adding WebAuthn security keys to use as 2FA
This adds a basic UI for enabling WebAuthn 2FA. We did a little refactor
to the Settings page for editing the 2FA methods – now it will list the
methods that are available to the user (TOTP and WebAuthn) and from
there they'll be able to add or remove any of them.
Also, it's worth mentioning that for enabling WebAuthn it's required to
have TOTP enabled, so the first time that you go to the 2FA Settings
page, you'll be asked to set it up.
This work was inspired by the one donde by Github in their platform, and
despite it could be approached in different ways, we decided to go with
this one given that we feel that this gives a great UX.
Co-authored-by: Facundo Padula <facundo.padula@cedarcode.com>
* feat: add request for WebAuthn as second factor at login if enabled
This commits adds the feature for using WebAuthn as a second factor for
login when enabled.
If users have WebAuthn enabled, now a page requesting for the use of a
WebAuthn credential for log in will appear, although a link redirecting
to the old page for logging in using a two-factor code will also be
present.
Co-authored-by: Facundo Padula <facundo.padula@cedarcode.com>
* feat: add possibility of deleting WebAuthn Credentials
Co-authored-by: Facundo Padula <facundo.padula@cedarcode.com>
* feat: disable WebAuthn when an Admin disables 2FA for a user
Co-authored-by: Facundo Padula <facundo.padula@cedarcode.com>
* feat: remove ability to disable TOTP leaving only WebAuthn as 2FA
Following examples form other platforms like Github, we decided to make
Webauthn 2FA secondary to 2FA with TOTP, so that we removed the
possibility of removing TOTP authentication only, leaving users with
just WEbAuthn as 2FA. Instead, users will have to click on 'Disable 2FA'
in order to remove second factor auth.
The reason for WebAuthn being secondary to TOPT is that in that way,
users will still be able to log in using their code from their phone's
application if they don't have their security keys with them – or maybe
even lost them.
* We had to change a little the flow for setting up TOTP, given that now
it's possible to setting up again if you already had TOTP, in order to
let users modify their authenticator app – given that now it's not
possible for them to disable TOTP and set it up again with another
authenticator app.
So, basically, now instead of storing the new `otp_secret` in the
user, we store it in the session until the process of set up is
finished.
This was because, as it was before, when users clicked on 'Edit' in
the new two-factor methods lists page, but then went back without
finishing the flow, their `otp_secret` had been changed therefore
invalidating their previous authenticator app, making them unable to
log in again using TOTP.
Co-authored-by: Facundo Padula <facundo.padula@cedarcode.com>
* refactor: fix eslint errors
The PR build was failing given that linting returning some errors.
This commit attempts to fix them.
* refactor: normalize i18n translations
The build was failing given that i18n translations files were not
normalized.
This commits fixes that.
* refactor: avoid having the webauthn gem locked to a specific version
* refactor: use symbols for routes without '/'
* refactor: avoid sending webauthn disabled email when 2FA is disabled
When an admins disable 2FA for users, we were sending two mails
to them, one notifying that 2FA was disabled and the other to notify
that WebAuthn was disabled.
As the second one is redundant since the first email includes it, we can
remove it and send just one email to users.
* refactor: avoid creating new env variable for webauthn_origin config
* refactor: improve flash error messages for webauthn pages
Co-authored-by: Facundo Padula <facundo.padula@cedarcode.com>
While OAuth tokens were immediately revoked, accessing the home
controller immediately generated new OAuth tokens and "revived"
the session due to a combination of using remember_me tokens and
overwriting the `authenticate_user!` method
When attempting to access the log-in page while already logged in,
Devise's `require_no_authentication` kicks in and sets a flash
message “You are already signed in.”
In almost all cases, this also causes a redirect to /web, which
does not display or clear flash messages, thus leaving the message
to a potentially much later date, like for instance, accessing
/preferences several minutes after being redirected to /web.
While making browser requests in the other sessions after a password
change or reset does not allow you to be logged in and correctly
invalidates the session making the request, sessions have API tokens
associated with them, which can still be used until that session
is invalidated.
This is a security issue for accounts that were already compromised
some other way because it makes it harder to throw out the hijacker.
Allow access to account settings, 2FA, authorized applications, and
account deletions to unconfirmed and pending users, as well as
users who had their accounts disabled. Suspended users cannot update
their e-mail or password or delete their account.
Display account status on account settings page, for example, when
an account is frozen, limited, unconfirmed or pending review.
After sign up, login users straight away and show a simple page that
tells them the status of their account with links to account settings
and logout, to reduce onboarding friction and allow users to correct
wrongly typed e-mail addresses.
Move the final sign-up step of SSO integrations to be the same
as above to reduce code duplication.
* Check that an invite link is valid before bypassing approval mode
Fixes#10656
* Add tests
* Only consider valid invite links in registration controller
* fixup
* Add "why do you want to join" field to invite requests
Fix#10512
* Remove unused translations
* Fix broken registrations when no invite request text is submitted
* Add REST API for creating an account
The method is available to apps with a token obtained via the client
credentials grant. It creates a user and account records, as well as
an access token for the app that initiated the request. The user is
unconfirmed, and an e-mail is sent as usual.
The method returns the access token, which the app should save for
later. The REST API is not available to users with unconfirmed
accounts, so the app must be smart to wait for the user to click a
link in their e-mail inbox.
The method is rate-limited by IP to 5 requests per 30 minutes.
* Redirect users back to app from confirmation if they were created with an app
* Add tests
* Return 403 on the method if registrations are not open
* Require agreement param to be true in the API when creating an account
* Add force_login option to OAuth authorize page
For when a user needs to sign into an app from multiple accounts
on the same server
* When logging out from modal header, redirect back after re-login
* Allow moderators to disable/enable login
* Instead of rejecting login, show forbidden error when login disabled
Avoid confusion because when login is rejected, the message is that
the account is not activated, which is wrong.
* Fix tests
* Add confirmation step for email changes
This adds a confirmation step for email changes of existing users.
Like the initial account confirmation, a confirmation link is sent
to the new address.
Additionally, a notification is sent to the existing address when
the change is initiated. This message includes instruction to reset
the password immediately or to contact the instance admin if the
change was not initiated by the account owner.
Fixes#3871
* Add review fixes
Claire