Exploited
high
7.8
CWE
74 20
Advisory Published
Advisory Published
Updated

CVE-2020-28949: PEAR Archive_Tar Deserialization of Untrusted Data Vulnerability

First published: Thu Nov 19 2020(Updated: )

A flaw was found in the Archive_Tar package. PEAR Archive_Tar could allow a local authenticated attacker to bypass security restrictions caused by a stream-wrapper attack. An attacker can overwrite arbitrary files on the system using a specially-crafted tar archive.

Credit: cve@mitre.org

Affected SoftwareAffected VersionHow to fix
PEAR Archive_Tar
composer/pear/archive_tar<1.4.11
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
redhat/Archive_Tar<1.4.11
1.4.11
redhat/php-pear<1:1.9.4-23.el7_9
1:1.9.4-23.el7_9

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Reference Links

Parent vulnerabilities

(Appears in the following advisories)

Frequently Asked Questions

  • What is CVE-2020-28949?

    CVE-2020-28949 is a vulnerability in PEAR Archive_Tar that allows an unserialization attack due to blocking the phar: protocol but not the PHAR: protocol.

  • What is PEAR Archive_Tar?

    PEAR Archive_Tar is an open-source framework and distribution system for reusable PHP components.

  • How does CVE-2020-28949 affect me?

    CVE-2020-28949 affects you if you are using the affected versions of PEAR Archive_Tar, PHP-PEAR, Drupal, or specific Linux distributions.

  • What is the severity of CVE-2020-28949?

    CVE-2020-28949 has a severity of high, with a CVSS score of 7.1.

  • How can I mitigate CVE-2020-28949?

    To mitigate CVE-2020-28949, update PEAR Archive_Tar, PHP-PEAR, Drupal, or the affected Linux distributions to the recommended versions.

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