CVE-2017-6921

File REST resource does not properly validate

Description

In Drupal 8 prior to 8.3.4; The file REST resource does not properly validate some fields when manipulating files. A site is only affected by this if the site has the RESTful Web Services (rest) module enabled, the file REST resource is enabled and allows PATCH requests, and an attacker can get or register a user account on the site with permissions to upload files and to modify the file resource.

Category

5.9
CVSS
Severity: Medium
CVSS 3.0 •
CVSS 2.0 •
EPSS 0.40%
Vendor Advisory drupal.org
Affected: Drupal Drupal Core
Published at:
Updated at:

References

Link Tags
http://www.securityfocus.com/bid/99222 third party advisory vdb entry
https://www.drupal.org/forum/newsletters/security-advisories-for-drupal-core/2017-06-21/drupal-core-multiple mitigation vendor advisory
http://www.securitytracker.com/id/1038781 third party advisory vdb entry

Frequently Asked Questions

What is the severity of CVE-2017-6921?
CVE-2017-6921 has been scored as a medium severity vulnerability.
How to fix CVE-2017-6921?
To fix CVE-2017-6921, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2017-6921 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2017-6921 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2017-6921?
CVE-2017-6921 affects Drupal Drupal Core.
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