Moderate: php:7.4 security update

Related Vulnerabilities: CVE-2020-28948   CVE-2020-28949   CVE-2020-36193  

Synopsis

Moderate: php:7.4 security update

Type/Severity

Security Advisory: Moderate

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Topic

An update for the php:7.4 module is now available for Red Hat Enterprise Linux 8.4 Extended Update Support.

Red Hat Product Security has rated this update as having a security impact of Moderate. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.

Description

PHP is an HTML-embedded scripting language commonly used with the Apache HTTP Server.

Security Fix(es):

  • Archive_Tar: allows an unserialization attack because phar: is blocked but PHAR: is not blocked (CVE-2020-28948)
  • Archive_Tar: improper filename sanitization leads to file overwrites (CVE-2020-28949)
  • Archive_Tar: directory traversal due to inadequate checking of symbolic links (CVE-2020-36193)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Solution

For details on how to apply this update, which includes the changes described in this advisory, refer to:

https://access.redhat.com/articles/11258

After installing the updated packages, the httpd daemon must be restarted for the update to take effect.

Affected Products

  • Red Hat Enterprise Linux for x86_64 - Extended Update Support 8.4 x86_64
  • Red Hat Enterprise Linux Server - AUS 8.4 x86_64
  • Red Hat Enterprise Linux for IBM z Systems - Extended Update Support 8.4 s390x
  • Red Hat Enterprise Linux for Power, little endian - Extended Update Support 8.4 ppc64le
  • Red Hat Enterprise Linux Server - TUS 8.4 x86_64
  • Red Hat Enterprise Linux for ARM 64 - Extended Update Support 8.4 aarch64
  • Red Hat Enterprise Linux Server for Power LE - Update Services for SAP Solutions 8.4 ppc64le
  • Red Hat Enterprise Linux for x86_64 - Update Services for SAP Solutions 8.4 x86_64

Fixes

  • BZ - 1904001 - CVE-2020-28948 Archive_Tar: allows an unserialization attack because phar: is blocked but PHAR: is not blocked
  • BZ - 1910323 - CVE-2020-28949 Archive_Tar: improper filename sanitization leads to file overwrites
  • BZ - 1942961 - CVE-2020-36193 Archive_Tar: directory traversal due to inadequate checking of symbolic links