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Vulnerabilities

Vulnerability · CVE-2020-36193

PEAR Archive_Tar Improper Link Resolution Vulnerability

Published Jan 18, 2021 · catalog updated Jun 16, 2026 · PEAR Archive_Tar

Patch now

CVE-2020-36193 is in the CISA known-exploited catalog, due Sep 15, 2022. Confirm PEAR Archive_Tar against the vendor advisory and apply that fix. The CVSS score does not change the priority.

Severity
High7.5
Known exploitation
CISA KEV and VulnCheck KEV
EPSS
70.59%
Remediation
Remediation guidance
Affected products
cpe debian/debian linux · cpe drupal/drupal · cpe fedoraproject/fedora · cpe php/archive tar · vendor PEAR 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.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • 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

How to fix CVE-2020-36193

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

CVE-2020-36193 is in the CISA known-exploited catalog, due Sep 15, 2022. Confirm PEAR Archive_Tar against the vendor advisory and apply that fix. The CVSS score does not change the priority.

Which versions are affected?

Compare what you have installed with debian/debian linux 10.0; debian/debian linux 9.0. Apply updates per vendor instructions.

What should an analyst verify?

CWE-22: Path Traversal; CWE-59: Link Following. EPSS 70.59%. The CISA KEV listing is the exploitation evidence. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Technology hubs

Drupal security

Code

The project this record applies to. Exploit listings stay in References.

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.

Sources

  • CISA KEVConfirmed exploitationCVE-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.orgVulnerability recordCVE-2020-36193

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2020-36193

    30-day exploitation probability 70.6%

    first.org
  • NIST NVDVulnerability recordCVE-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
  • VulnCheck KEVConfirmed exploitationCVE-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

    vulncheck.com

References

Freshness

Last verified in this catalog Oct 17, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.