CVEvulnerability

CVE-2020-28949

7.8 HIGH Known exploited Published 2020-11-19 Modified 2026-06-17 Official page ↗

CISA Known Exploited Vulnerability

PEAR Archive_Tar Deserialization of Untrusted Data Vulnerability — PEAR Archive_Tar

PEAR Archive_Tar allows an unserialization attack because phar: is blocked but PHAR: is not blocked. 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.

Added to KEV
2022-08-25
Remediation due
2022-09-15
Ransomware use
Unknown
Required action
Apply updates per vendor instructions.
Notes
https://pear.php.net/bugs/bug.php?id=27002, https://www.drupal.org/sa-core-2020-013, https://access.redhat.com/security/cve/cve-2020-28949; https://nvd.nist.gov/vuln/detail/CVE-2020-28949
Status
Analyzed
Published
2020-11-19
Last modified
2026-06-17
Assigner
[email protected]
CVSS 3.1 ([email protected])
7.8 HIGH — CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CVSS 3.1 (134c704f-9b21-4f2e-91b3-4a467353bcc0)
7.8 HIGH — CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CVSS 2.0 ([email protected])
6.8 MEDIUM — AV:N/AC:M/Au:N/C:P/I:P/A:P

Description

Archive_Tar through 1.4.10 has :// filename sanitization only to address phar attacks, and thus any other stream-wrapper attack (such as file:// to overwrite files) can still succeed.

Affected configurations

• php archive tar (< 1.4.12) • debian debian linux 9.0 • debian debian linux 10.0 • fedoraproject fedora 32 • fedoraproject fedora 33 • fedoraproject fedora 34 • fedoraproject fedora 35 • drupal drupal (>= 7.0 < 7.75) • drupal drupal (>= 8.0.0 < 8.9.10) • drupal drupal (>= 8.8.0 < 8.8.12) • drupal drupal (>= 9.0.0 < 9.0.9)

References