Moderate: python27:2.7 security update

Related Vulnerabilities: CVE-2021-3733   CVE-2021-3737   CVE-2021-4189   CVE-2021-43818   CVE-2022-0391  

Synopsis

Moderate: python27:2.7 security update

Type/Severity

Security Advisory: Moderate

Red Hat Insights patch analysis

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Topic

An update for the python27:2.7 module is now available for Red Hat Enterprise Linux 8.

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

Python is an interpreted, interactive, object-oriented programming language that supports modules, classes, exceptions, high-level dynamic data types, and dynamic typing. The python27 packages provide a stable release of Python 2.7 with a number of additional utilities and database connectors for MySQL and PostgreSQL.

Security Fix(es):

  • python: urllib: Regular expression DoS in AbstractBasicAuthHandler (CVE-2021-3733)
  • python: ftplib should not use the host from the PASV response (CVE-2021-4189)
  • python-lxml: HTML Cleaner allows crafted and SVG embedded scripts to pass through (CVE-2021-43818)
  • python: urllib.parse does not sanitize URLs containing ASCII newline and tabs (CVE-2022-0391)
  • python: urllib: HTTP client possible infinite loop on a 100 Continue response (CVE-2021-3737)

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.

Additional Changes:

For detailed information on changes in this release, see the Red Hat Enterprise Linux 8.6 Release Notes linked from 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

Affected Products

  • Red Hat Enterprise Linux for x86_64 8 x86_64
  • Red Hat Enterprise Linux for x86_64 - Extended Update Support 8.6 x86_64
  • Red Hat Enterprise Linux Server - AUS 8.6 x86_64
  • Red Hat Enterprise Linux for IBM z Systems 8 s390x
  • Red Hat Enterprise Linux for IBM z Systems - Extended Update Support 8.6 s390x
  • Red Hat Enterprise Linux for Power, little endian 8 ppc64le
  • Red Hat Enterprise Linux for Power, little endian - Extended Update Support 8.6 ppc64le
  • Red Hat Enterprise Linux Server - TUS 8.6 x86_64
  • Red Hat Enterprise Linux for ARM 64 8 aarch64
  • Red Hat Enterprise Linux for ARM 64 - Extended Update Support 8.6 aarch64
  • Red Hat Enterprise Linux Server for Power LE - Update Services for SAP Solutions 8.6 ppc64le
  • Red Hat Enterprise Linux Server for x86_64 - Update Services for SAP Solutions 8.6 x86_64

Fixes

  • BZ - 1995162 - CVE-2021-3737 python: urllib: HTTP client possible infinite loop on a 100 Continue response
  • BZ - 1995234 - CVE-2021-3733 python: urllib: Regular expression DoS in AbstractBasicAuthHandler
  • BZ - 2006792 - RHEL 8 Python 2.7: pip contains bundled pre-built exe files in site-packages/pip/_vendor/distlib/
  • BZ - 2032569 - CVE-2021-43818 python-lxml: HTML Cleaner allows crafted and SVG embedded scripts to pass through
  • BZ - 2036020 - CVE-2021-4189 python: ftplib should not use the host from the PASV response
  • BZ - 2047376 - CVE-2022-0391 python: urllib.parse does not sanitize URLs containing ASCII newline and tabs