Описание
Ash Authentication has flawed token revocation checking logic in actions generated by mix ash_authentication.install
Impact
Applications which have been bootstrapped by the new igniter installer (since AshAuthentication v4.1.0) and who have used the magic link strategy, password resets, confirmation, or are manually revoking tokens are affected by revoked tokens being allowed to verify as valid. If you did not use the new installer, then you are absolutely not affected.
Additionally, unless you have implemented any kind of custom token revocation feature in your application (in which case even cursory testing would have uncovered this issue), then you will not be significantly affected.
The impact here for users is as follows:
- For users using the magic link strategy, magic link tokens are reusable until they expire instead of being immediately revoked. By default magic link tokens are valid for 10 minutes.
- For users of password resets in the password strategy, password reset tokens are reusable until they expire instead of being immediately revoked. By default password reset tokens are valid for 3 days.
- For users of the confirmation add-on, confirmation tokens are reusable until they expire instead of being immediately revoked. By default password reset tokens are valid for 3 days.
Patches
The flaw is patched in version 4.4.9. Additionally a compile time warning is shown to users with remediation instructions if they upgrade. 4.4.9 ships with an upgrader, so if you use mix igniter.upgrade ash_authentication the necessary patch will be applied for you. Otherwise you can run the upgrader manually as described in the error message
Example
Workarounds
Delete the generated :revoked? generic action in your token resource This will cause it to use the one internal to AshAuthentication which has always been correct. Alternatively, manually make the changes described above.
References
See the #ash_authentication channel on the Ash Discord.
Пакеты
ash_authentication
>= 4.1.0, < 4.4.9
4.4.9
Связанные уязвимости
Ash Authentication is an authentication framework for Elixir applications. Applications which have been bootstrapped by the igniter installer present since AshAuthentication v4.1.0 and who have used the magic link strategy _or_ are manually revoking tokens are affected by revoked tokens being allowed to verify as valid. Unless one hase implemented any kind of custom token revocation feature in your application, then one will not be affected. The impact here for users using builtin functionality is that magic link tokens are reusable until they expire. With that said, magic link tokens are only valid for 10 minutes, so the surface area for abuse is extremely low here. The flaw is patched in version 4.4.9. Additionally a compile time warning is shown to users with remediation instructions if they upgrade. 4.4.9 ships with an upgrader, so those who use `mix igniter.upgrade ash_authentication` will have the necessary patch applied. Otherwise, one may run the upgrader manually as described