[1.x] Kontainer media

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To the reviewers

Please read How to review security advisory coverage applications, Application workflow, What to cover in an application review, and Tools to use for reviews.

The important notes are the following.

• It is preferable to wait for a Code Review Administrator before commenting on newly created applications, even to leave a comment similar to the following one. Code Review Administrators will do some preliminary checks that are necessary before any change on the project files is suggested.
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1. FILE: kontainer.module

/**
 * @file
 * Drupal Module: Kontainer.
 */

The description for a module is Hook implementations for the [module name] module. where [module name] is the module name given in the .info.yml file.

2. The documentation comment for constructors is not mandatory anymore, If it is given, the description must be Constructs a new [class name] object. where [class name] includes the class namespace.

  /**
   * Class constructor.
   *

Function and method declarations are written on a single line.

src/Plugin/Field/FieldFormatter/KontainerCdnFormatter.php
src/Plugin/Field/FieldWidget/KontainerCdnItemWidget.php
src/Plugin/Field/FieldWidget/KontainerReferenceItemWidget.php
src/Plugin/Validation/Constraint/KontainerLinkConstraintValidator.php
src/Plugin/media/Source/KontainerFileAssetDeriver.php
src/Service/KontainerService.php
src/Form/KontainerConfigForm.php
src/Controller/KontainerController.php

docs and main are wrong names for a branch and should be removed. Release branch names always end with the literal .x as described in Release branches.

The only exception is for the main branch, which is actually not fully supported on drupal.org and should be avoided.

There are a couple of the phpcs error in this file. Code looks good. No duplication of code or functionality that I could see. README.md looks good, No security vulnerabilities that I can see off hand. Moving to Reviewed and tested if no one objects.

FILE: /var/www/html/global/web/modules/contrib/kontainer/js/kontainer.js
---------------------------------------------------------------------------------------------
FOUND 7 ERRORS AFFECTING 5 LINES
---------------------------------------------------------------------------------------------
3 | ERROR | [x] TRUE, FALSE and NULL must be uppercase; expected "NULL" but found "null"
7 | ERROR | [x] TRUE, FALSE and NULL must be uppercase; expected "FALSE" but found "false"
28 | ERROR | [x] TRUE, FALSE and NULL must be uppercase; expected "NULL" but found "null"
34 | ERROR | [x] TRUE, FALSE and NULL must be uppercase; expected "TRUE" but found "true"
63 | ERROR | [x] TRUE, FALSE and NULL must be uppercase; expected "NULL" but found "null"
63 | ERROR | [x] TRUE, FALSE and NULL must be uppercase; expected "NULL" but found "null"
63 | ERROR | [x] TRUE, FALSE and NULL must be uppercase; expected "NULL" but found "null"
---------------------------------------------------------------------------------------------
PHPCBF CAN FIX THE 7 MARKED SNIFF VIOLATIONS AUTOMATICALLY
---------------------------------------------------------------------------------------------

Time: 3.75 secs; Memory: 12MB

manual review:

1. route kontainer.delete_media_types: this is vulnerable to CSRF exploits as this is a destructive operation. You need to protect the route with a CSRF token or confirmation form.
2. KontainerAuth::authenticate(): this is vulnerable to timing attacks. When comparing secret strings you need to use the hash_equals() function instead of "===".
3. KontainerReferenceItemWidget::formElement(): there should be a way to generate URLs with manually setting up the CSRF token. If you use the normal URL generator it should spit out the URL including the CSRF token, as Drupal knows that the route should be CSRF protected.
4. kontainer.create_media: This route is missing access control? What permission does the user need to create media? The CSRF token is not an access protection, it is a validation of user intent. Looks like an access bypass vulnerability.

Please fix the 3 security vulnerabilities and check your code for other similar issues. And please don't remove the security tag, we keep that for statistics and to show examples of security problems.

Thanks for the fixes!

kontainer.create_media: ah I see, did not see the access check later in the service. I would recommend to untangle that and do the access checking explicitly on the routing layer, then there is a lower risk that this gets lost in a refactoring for example.

Generating URLs with CSRF token: it works like this, which you can use similarliy for your ajaxTurstedUrl

use Drupal\Core\Url;
$route_name = 'system.run_cron';
$url = Url::fromRoute($route_name);
print $url->toString();

Which will output /admin/reports/status/run-cron?token=QJoWTyS5Bcf8KP_gvhmjUwm-s1rlrvSqL3XHgVsxEKQ
Or do you need to CSRF token standalone for some reason? It is only every useful in combination with the path?

src/Authentication/Provider/KontainerAuth.php: hash_equals(): Caution: It is important to provide the user-supplied string as the second parameter, rather than the first. You are doing that wrong. But I think it is very hard to exploit this with a timing attack, so would consider this a security hardening and not a security blocker.

Otherwise looks good to me!

Thanks for your contribution, Domen!

I updated your account so you can opt into security advisory coverage now.

Here are some recommended readings to help with excellent maintainership:

• Dries' post on Responsible maintainers
• Best practices for creating and maintaining projects
• Maintaining a drupal.org project with Git
• Commit messages - providing history and credit
• Release naming conventions.
• Helping maintainers in the issue queues

You can find lots more contributors chatting on Slack or IRC in #drupal-contribute. So, come hang out and stay involved!

Thanks, also, for your patience with the review process. Anyone is welcome to participate in the review process. Please consider reviewing other projects that are pending review. I encourage you to learn more about that process and join the group of reviewers.

Thanks to the dedicated reviewer(s) as well.