Follow-up to #2418119: REST user updates bypass tightened user account change validation

The original fix invoked the password service directly. Instead it needs to invoke the user.auth service, since the password validation may proceed thorough an external service or alternative password storage.

The UserAuthInterface may need to be enhanced to also have a method to accept a pre-loaded user entity rather than always loading based on user name.

Problem

Proposed resolution

Remaining tasks

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CommentFileSizeAuthor
#6 2503113-6.patch5.27 KBdawehner
#6 2503113-6-fail.patch4.4 KBdawehner
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pwolanin’s picture

alexpott’s picture

Issue tags: -Triaged D8 critical
dawehner’s picture

Issue summary: View changes

Implement a new ProtectedUserFieldConstraint that validates the password and email field for users on form submissions and REST requests. Add methods to UserInterface to set the existing plain text password so that the validation constraint can check if the correct password was supplies to change the protected user and email fields. Add a new "existing" password property to PasswordItem which holds the supplied plain text password but is never saved.

That seems to be just a copy of the old issue summary ... let's skip it to not get confused ...

I'm wondering whether the password checking for itself adds value or whether we always want to use the user authentication.
Maybe we could provide a special field which provides user authentication, given that the password field is a generic field type as part of core
and user authentication is an additional concept on top of that.

The user entity would then go with the password field with the user authentication constraint, while other people can still use a generic password field.

andypost’s picture

dawehner’s picture

Let's try to work on that.
Thank you @andypost for adding this sort of related issue

dawehner’s picture

Status: Active » Needs review
FileSize
4.4 KB
5.27 KB

The UserAuthInterface may need to be enhanced to also have a method to accept a pre-loaded user entity rather than always loading based on user name.

I think we don't need it, because we call this just in case we change an already saved user.

webchick’s picture

Priority: Critical » Major

Talked to Peter. This will cause issues for anyone using REST + non-local auth, but that isn't "the system" being unusable:

"it's not grossly broken, just using the wrong api"

Downgrading to major as a result. If there's something directly exploitable, let's revisit. ATM it sounds like people just won't be able to authenticate at all.

dawehner’s picture

So let's assume you want to simple use a different authentication. You replace the user.auth service so the UI uses that to login.
Would you expect the password field in your user edit form to talk with the authentication service or with the storage in user, which stores something totally different?

The last submitted patch, 6: 2503113-6-fail.patch, failed testing.

Status: Needs review » Needs work

The last submitted patch, 6: 2503113-6.patch, failed testing.

The last submitted patch, 6: 2503113-6-fail.patch, failed testing.

The last submitted patch, 6: 2503113-6.patch, failed testing.

Wim Leers’s picture

Component: rest.module » user.module
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