DRUPAL-CORE-2021-004

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    DRUPAL-CORE-2021-004

    Published: 21 Jul 2021Last Modified: 10 Dec 2025

    Summary:

    Details: The Drupal project uses the pear Archive\_Tar library, which has released a security update that impacts Drupal. The vulnerability is mitigated by the fact that Drupal core's use of the Archive\_Tar library is not vulnerable, as it does not permit symlinks. Exploitation may be possible if contrib or custom code uses the library to extract tar archives (for example .tar, .tar.gz, .bz2, or .tlz) which come from a potentially untrusted source. This advisory is not covered by [Drupal Steward](/steward).

    References: https://www.drupal.org/sa-core-2021-004

    Affected packages

    Package

    Name: drupal/core

    Purl: pkg:composer/drupal/core

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 8.0.0
    Fixed -8.9.17

    Affected versions

    8.0.0
    8.0.1
    8.0.2
    8.0.3
    8.0.4
    8.0.5
    8.0.6

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High
    DRUPAL-CORE-2021-004 | CVE-DB