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CVE-2017-6921

Date: January 15, 2019

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.

Language: PHP

Severity Score

Related Resources (9)

https://www.drupal.org/SA-CORE-2017-003
https://github.com/FriendsOfPHP/security-advisories/blob/master/drupal/core/CVE-2017-6921.yaml
http://www.securitytracker.com/id/1038781
http://www.securityfocus.com/bid/99222
https://github.com/drupal/core
https://github.com/FriendsOfPHP/security-advisories/blob/master/drupal/drupal/CVE-2017-6921.yaml
https://nvd.nist.gov/vuln/detail/CVE-2017-6921
https://www.drupal.org/forum/newsletters/security-advisories-for-drupal-core/2017-06-21/drupal-core-multiple
https://www.mend.io/vulnerability-database/CVE-2017-6921

Severity Score

Weakness Type (CWE)

Improper Access Control

CWE-284

Improper Input Validation

CWE-20

CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): HIGH
Privileges Required (PR): NONE
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): NONE
Integrity (I): HIGH
Availability (A): NONE

CVSS v2

Base Score:
Access Vector (AV): NETWORK
Access Complexity (AC): MEDIUM
Authentication (AU): NONE
Confidentiality (C): NONE
Integrity (I): PARTIAL
Availability (A): NONE
Additional information:

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