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Findings

CVE-2020-36193

PEAR Archive_Tar Improper Link Resolution Vulnerability

Published Jan 18, 2021 · updated Jun 16, 2026 · php archive tar

PEAR Archive_Tar Tar.php allows write operations with directory traversal due to inadequate checking of symbolic links. PEAR stands for PHP Extension and Application Repository and it is an open-source framework and distribution system for reusable PHP components with known usage in third-party products such as Drupal Core and Red Hat Linux.

Timeline

Detection, updates, and resolution for this record.

  1. Jan 18, 2021 · Catalog

    Detected

    PEAR Archive_Tar Tar.php allows write operations with directory traversal due to inadequate checking of symbolic links. PEAR stands for PHP Extension and Application Repository and it is an open-source framework and distribution system for reusable PHP components with known usage in third-party products such as Drupal Core and Red Hat Linux.

  2. Aug 25, 2022 · CISA KEV

    Known exploited

    Apply updates per vendor instructions.

  3. Sep 15, 2022 · CISA KEV

    Remediation due

    Apply updates per vendor instructions.

  4. Jun 16, 2026 · Catalog

    Updated

    PEAR Archive_Tar Tar.php allows write operations with directory traversal due to inadequate checking of symbolic links. PEAR stands for PHP Extension and Application Repository and it is an open-source framework and distribution system for reusable PHP components with known usage in third-party products such as Drupal Core and Red Hat Linux.

Required action

Apply updates per vendor instructions.

CISA due date Sep 15, 2022

Affected

  • cpe debian/debian linux10.0
  • cpe debian/debian linux9.0
  • cpe drupal/drupalversion unspecified
  • cpe fedoraproject/fedora32
  • cpe fedoraproject/fedora33
  • cpe fedoraproject/fedora34
  • cpe fedoraproject/fedora35
  • cpe php/archive tarversion unspecified
  • vendor PEAR Archive_Tarversion unspecified

Sources

  • CISA KEVCVE-2020-36193

    PEAR Archive_Tar Tar.php allows write operations with directory traversal due to inadequate checking of symbolic links. PEAR stands for PHP Extension and Application Repository and it is an open-source framework and distribution system for reusable PHP components with known usage in third-party products such as Drupal Core and Red Hat Linux.

    cisa.gov
  • CVE.orgCVE-2020-36193

    Official CVE identifier

    cve.org
  • FIRST EPSSCVE-2020-36193

    30-day exploitation probability 70.6%

    first.org
  • NIST NVDCVE-2020-36193

    Tar.php in Archive_Tar through 1.4.11 allows write operations with Directory Traversal due to inadequate checking of symbolic links, a related issue to CVE-2020-28948.

    nvd.nist.gov

References