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Drupal core Unrestricted Upload of File with Dangerous Type

High severity GitHub Reviewed Published Oct 12, 2021 to the GitHub Advisory Database • Updated Jul 25, 2024

Package

composer drupal/core (Composer)

Affected versions

>= 9.0.0, < 9.0.8
>= 8.9.0, < 8.9.9
>= 8.0.0, < 8.8.11
>= 7.0.0, < 7.74

Patched versions

9.0.8
8.9.9
8.8.11
7.74
composer drupal/drupal (Composer)
>= 7.0.0, < 7.74
>= 8.0.0, < 8.8.11
>= 8.9.0, < 8.9.9
>= 9.0.0, < 9.0.8
7.74
8.8.11
8.9.9
9.0.8

Description

Drupal core does not properly sanitize certain filenames on uploaded files, which can lead to files being interpreted as the incorrect extension and served as the wrong MIME type or executed as PHP for certain hosting configurations. This issue affects: Drupal Drupal Core 9.0 versions prior to 9.0.8, 8.9 versions prior to 8.9.9, 8.8 versions prior to 8.8.11, and 7 versions prior to 7.74.

References

Published by the National Vulnerability Database Nov 20, 2020
Reviewed Oct 8, 2021
Published to the GitHub Advisory Database Oct 12, 2021
Last updated Jul 25, 2024

Severity

High

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
Low
Privileges required
Low
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

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

EPSS score

53.723%
(98th percentile)

Weaknesses

CVE ID

CVE-2020-13671

GHSA ID

GHSA-68jc-v27h-vhmw

Source code

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