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Drupal file REST resource does not properly validate

Moderate severity GitHub Reviewed Published May 13, 2022 to the GitHub Advisory Database • Updated Apr 23, 2024

Package

composer drupal/core (Composer)

Affected versions

>= 8.0, < 8.3.4

Patched versions

8.3.4
composer drupal/drupal (Composer)
>= 8.0, < 8.3.4
8.3.4

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.

References

Published by the National Vulnerability Database Jan 15, 2019
Published to the GitHub Advisory Database May 13, 2022
Last updated Apr 23, 2024
Reviewed Apr 23, 2024

Severity

Moderate

CVSS overall score

This score calculates overall vulnerability severity from 0 to 10 and is based on the Common Vulnerability Scoring System (CVSS).
/ 10

CVSS v3 base metrics

Attack vector
Network
Attack complexity
High
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
High
Availability
None

CVSS v3 base metrics

Attack vector: More severe the more the remote (logically and physically) an attacker can be in order to exploit the vulnerability.
Attack complexity: More severe for the least complex attacks.
Privileges required: More severe if no privileges are required.
User interaction: More severe when no user interaction is required.
Scope: More severe when a scope change occurs, e.g. one vulnerable component impacts resources in components beyond its security scope.
Confidentiality: More severe when loss of data confidentiality is highest, measuring the level of data access available to an unauthorized user.
Integrity: More severe when loss of data integrity is the highest, measuring the consequence of data modification possible by an unauthorized user.
Availability: More severe when the loss of impacted component availability is highest.
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N

EPSS score

0.518%
(77th percentile)

Weaknesses

CVE ID

CVE-2017-6921

GHSA ID

GHSA-h377-287m-w2r9

Source code

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