RHSA-2022:1663 - Security Advisory

Topic

An update for python27-python and python27-python-pip is now available for Red Hat Software Collections.

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, which includes modules, classes, exceptions, very high level dynamic data types and dynamic typing. Python supports interfaces to many system calls and libraries, as well as to various windowing systems.

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: 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.

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 Software Collections (for RHEL Server) 1 for RHEL 7 x86_64
• Red Hat Software Collections (for RHEL Server for System Z) 1 for RHEL 7 s390x
• Red Hat Software Collections (for RHEL Server for IBM Power LE) 1 for RHEL 7 ppc64le
• Red Hat Software Collections (for RHEL Workstation) 1 for RHEL 7 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 - 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
• BZ - 2064442 - SCL Python 2.7: pip contains bundled pre-built exe files in site-packages/pip/_vendor/distlib/ [rhscl-3.8.z]

CVEs

• CVE-2021-3733
• CVE-2021-3737
• CVE-2021-4189
• CVE-2022-0391

References

• https://access.redhat.com/security/updates/classification/#moderate