CVE-2017-6928 Information

Description

Drupal core 7.x versions before 7.57 when using Drupal’s private file system Drupal will check to make sure a user has access to a file before allowing the user to view or download it. This check fails under certain conditions in which one module is trying to grant access to the file and another is trying to deny it leading to an access bypass vulnerability. This vulnerability is mitigated by the fact that it only occurs for unusual site configurations.

CVSS Vector

CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N

Reference

https://lists.debian.org/debian-lts-announce/2018/02/msg00030.html https://www.debian.org/security/2018/dsa-4123 https://www.drupal.org/sa-core-2018-001

Attack Complexity

HIGH

Privileges Required

LOW

User Interaction Required

LOW

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

NONE

Base Score

NONE

Base Severity

5.3