CVE-2017-6931 Drupal Settings Tray access bypass

Medium 6.5 Published Updated

Attackers can modify unauthorized data via the Settings Tray module in Drupal core, requiring an upgrade to fix.

Exploited in the wild
Not known
Login needed
Any signed-in user
Attackable
Over the internet
Victim action needed
Not needed
Fix
Available

What is CVE-2017-6931?

CVE-2017-6931 is a medium-severity missing authorization vulnerability in Drupal Drupal, published on 1 Mar 2018. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

In Drupal versions 8.4.x versions before 8.4.5 the Settings Tray module has a vulnerability that allows users to update certain data that they do not have the permissions for. If you have implemented a Settings Tray form in contrib or a custom module, the correct access checks should be added. This release fixes the only two implementations in core, but does not harden against other such bypasses. This vulnerability can be mitigated by disabling the Settings Tray module.

Weakness: CWE-434

Which versions are affected by CVE-2017-6931?

4 open source packages ship an affected version, including drupal/core and drupal/drupal. It affects 1 product.

PackageAffectedFixed in
drupal/core PackagistFrom 8.4.08.4.5
drupal/core PackagistFrom 8.4.08.4.5
drupal/drupal PackagistFrom 8.4.08.4.5
drupal/drupal PackagistFrom 8.4.08.4.5

Products include Drupal Drupal.

How do I fix CVE-2017-6931?

Upgrade drupal/core to 8.4.5 or later.

Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.

Is CVE-2017-6931 being exploited?

There is no known exploitation of CVE-2017-6931 in the wild and no public exploit code.

All Drupal Drupal vulnerabilities

Sources

Also known as GHSA-7ffh-cjvg-fpr4.

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