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====================================================================                   
Red Hat Security Advisory

Synopsis:          Moderate: python3 security and bug fix update
Advisory ID:       RHSA-2020:4433-01
Product:           Red Hat Enterprise Linux
Advisory URL:      https://access.redhat.com/errata/RHSA-2020:4433
Issue date:        2020-11-03
CVE Names:         CVE-2019-16935 CVE-2019-20907 CVE-2020-8492
                   CVE-2020-14422
====================================================================
1. Summary:

An update for python3 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.

2. Relevant releases/architectures:

Red Hat Enterprise Linux AppStream (v. 8) - aarch64, ppc64le, s390x, x86_64
Red Hat Enterprise Linux BaseOS (v. 8) - aarch64, ppc64le, s390x, x86_64

3. 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: XSS vulnerability in the documentation XML-RPC server in
server_title field (CVE-2019-16935)

* python: infinite loop in the tarfile module via crafted TAR archive
(CVE-2019-20907)

* python: wrong backtracking in urllib.request.AbstractBasicAuthHandler
allows for a ReDoS (CVE-2020-8492)

* python: DoS via inefficiency in IPv{4,6}Interface classes
(CVE-2020-14422)

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 8.3 Release Notes linked from the References section.

4. 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

5. Bugs fixed (https://bugzilla.redhat.com/):

1724996 - Speed up Python with -fno-semantic-interposition
1763229 - CVE-2019-16935 python: XSS vulnerability in the documentation XML-RPC server in server_title field
1772992 - python3-config --configdir incorrect
1809065 - CVE-2020-8492 python: wrong backtracking in urllib.request.AbstractBasicAuthHandler allows for a ReDoS
1814392 - test_site is failing on an installed python3
1851090 - distutils module: sysconfig.get_config_var('LIBPL') returns non existing directory
1854926 - CVE-2020-14422 python: DoS via inefficiency in IPv{4,6}Interface classes
1856481 - CVE-2019-20907 python: infinite loop in the tarfile module via crafted TAR archive

6. Package List:

Red Hat Enterprise Linux AppStream (v. 8):

aarch64:
platform-python-debug-3.6.8-31.el8.aarch64.rpm
platform-python-devel-3.6.8-31.el8.aarch64.rpm
python3-debuginfo-3.6.8-31.el8.aarch64.rpm
python3-debugsource-3.6.8-31.el8.aarch64.rpm
python3-idle-3.6.8-31.el8.aarch64.rpm
python3-tkinter-3.6.8-31.el8.aarch64.rpm

ppc64le:
platform-python-debug-3.6.8-31.el8.ppc64le.rpm
platform-python-devel-3.6.8-31.el8.ppc64le.rpm
python3-debuginfo-3.6.8-31.el8.ppc64le.rpm
python3-debugsource-3.6.8-31.el8.ppc64le.rpm
python3-idle-3.6.8-31.el8.ppc64le.rpm
python3-tkinter-3.6.8-31.el8.ppc64le.rpm

s390x:
platform-python-debug-3.6.8-31.el8.s390x.rpm
platform-python-devel-3.6.8-31.el8.s390x.rpm
python3-debuginfo-3.6.8-31.el8.s390x.rpm
python3-debugsource-3.6.8-31.el8.s390x.rpm
python3-idle-3.6.8-31.el8.s390x.rpm
python3-tkinter-3.6.8-31.el8.s390x.rpm

x86_64:
platform-python-3.6.8-31.el8.i686.rpm
platform-python-debug-3.6.8-31.el8.i686.rpm
platform-python-debug-3.6.8-31.el8.x86_64.rpm
platform-python-devel-3.6.8-31.el8.i686.rpm
platform-python-devel-3.6.8-31.el8.x86_64.rpm
python3-debuginfo-3.6.8-31.el8.i686.rpm
python3-debuginfo-3.6.8-31.el8.x86_64.rpm
python3-debugsource-3.6.8-31.el8.i686.rpm
python3-debugsource-3.6.8-31.el8.x86_64.rpm
python3-idle-3.6.8-31.el8.i686.rpm
python3-idle-3.6.8-31.el8.x86_64.rpm
python3-test-3.6.8-31.el8.i686.rpm
python3-tkinter-3.6.8-31.el8.i686.rpm
python3-tkinter-3.6.8-31.el8.x86_64.rpm

Red Hat Enterprise Linux BaseOS (v. 8):

Source:
python3-3.6.8-31.el8.src.rpm

aarch64:
platform-python-3.6.8-31.el8.aarch64.rpm
python3-debuginfo-3.6.8-31.el8.aarch64.rpm
python3-debugsource-3.6.8-31.el8.aarch64.rpm
python3-libs-3.6.8-31.el8.aarch64.rpm
python3-test-3.6.8-31.el8.aarch64.rpm

ppc64le:
platform-python-3.6.8-31.el8.ppc64le.rpm
python3-debuginfo-3.6.8-31.el8.ppc64le.rpm
python3-debugsource-3.6.8-31.el8.ppc64le.rpm
python3-libs-3.6.8-31.el8.ppc64le.rpm
python3-test-3.6.8-31.el8.ppc64le.rpm

s390x:
platform-python-3.6.8-31.el8.s390x.rpm
python3-debuginfo-3.6.8-31.el8.s390x.rpm
python3-debugsource-3.6.8-31.el8.s390x.rpm
python3-libs-3.6.8-31.el8.s390x.rpm
python3-test-3.6.8-31.el8.s390x.rpm

x86_64:
platform-python-3.6.8-31.el8.x86_64.rpm
python3-debuginfo-3.6.8-31.el8.i686.rpm
python3-debuginfo-3.6.8-31.el8.x86_64.rpm
python3-debugsource-3.6.8-31.el8.i686.rpm
python3-debugsource-3.6.8-31.el8.x86_64.rpm
python3-libs-3.6.8-31.el8.i686.rpm
python3-libs-3.6.8-31.el8.x86_64.rpm
python3-test-3.6.8-31.el8.x86_64.rpm

These packages are GPG signed by Red Hat for security.  Our key and
details on how to verify the signature are available from
https://access.redhat.com/security/team/key/

7. References:

https://access.redhat.com/security/cve/CVE-2019-16935
https://access.redhat.com/security/cve/CVE-2019-20907
https://access.redhat.com/security/cve/CVE-2020-8492
https://access.redhat.com/security/cve/CVE-2020-14422
https://access.redhat.com/security/updates/classification/#moderate
https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/8/html/8.3_release_notes/

8. Contact:

The Red Hat security contact is <secalert@redhat.com>. More contact
details at https://access.redhat.com/security/team/contact/

Copyright 2020 Red Hat, Inc.
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