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Red Hat: RHSA-2020-4641-01 Moderate Updates for python38 DoS and Exec Fixes

red hat
Calendar Grey November 3, 2020
Dist Redhat Esm H88
The advisory from Red Hat regarding Important updates for python39:3.9 addresses significant vulnerabilities and enhances security across numerous vectors.
An update for the python38:3.8 module is now available for Red Hat Enterprise Linux 8

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

Summary

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.
The following packages have been upgraded to a later upstream version: python38 (3.8.3). (BZ#1847416)
Security Fix(es):
* PyYAML: command execution through python/object/apply constructor in FullLoader (CVE-2019-20477)
* python: infinite loop in the tarfile module via crafted TAR archive (CVE-2019-20907)
* PyYAML: arbitrary command execution through python/object/new when FullLoader is used (CVE-2020-1747)
* 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.

Topics%20covered

Topics Covered

security advisory Red Hat command execution bug fix DoS moderate severity python

References

https://access.redhat.com/security/cve/CVE-2019-20477 https://access.redhat.com/security/cve/CVE-2019-20907 https://access.redhat.com/security/cve/CVE-2020-1747 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/

Package List

Red Hat Enterprise Linux AppStream (v. 8):
Source: Cython-0.29.14-4.module+el8.2.0+5234+f98739b6.src.rpm PyYAML-5.3.1-1.module+el8.3.0+7187+a27ec44b.src.rpm babel-2.7.0-10.module+el8.2.0+5234+f98739b6.src.rpm mod_wsgi-4.6.8-3.module+el8.2.0+5234+f98739b6.src.rpm numpy-1.17.3-5.module+el8.3.0+7187+a27ec44b.src.rpm python-PyMySQL-0.9.3-3.module+el8.2.0+5234+f98739b6.src.rpm python-asn1crypto-1.2.0-3.module+el8.2.0+5234+f98739b6.src.rpm python-cffi-1.13.2-3.module+el8.2.0+5234+f98739b6.src.rpm python-chardet-3.0.4-19.module+el8.2.0+5234+f98739b6.src.rpm python-cryptography-2.8-3.module+el8.2.0+5234+f98739b6.src.rpm python-idna-2.8-6.module+el8.2.0+5234+f98739b6.src.rpm python-jinja2-2.10.3-4.module+el8.2.0+5234+f98739b6.src.rpm python-lxml-4.4.1-4.module+el8.2.0+5234+f98739b6.src.rpm python-markupsafe-1.1.1-6.module+el8.2.0+5234+f98739b6.src.rpm python-ply-3.11-8.module+el8.2.0+5234+f98739b6.src.rpm python-psutil-5.6.4-3.module+el8.2.0+5234+f98739b6.src.rpm python-psycopg2-2.8.4-4.module+el8.2.0+5234+f98739b6.src.rpm python-pycparser-2.19-3.module+el8.2.0+5234+f98739b6.src.rpm python-pysocks-1.7.1-4.module+el8.2.0+5234+f98739b6.src.rpm python-requests-2.22.0-9.module+el8.2.0+5234+f98739b6.src.rpm python-six-1.12.0-9.module+el8.2.0+5234+f98739b6.src.rpm

Read the Full Advisory


Advisory ID: RHSA-2020:4641-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2020:4641
Issue date: 2020-11-03

Topic

An update for the python38:3.8 module is now available for Red HatEnterprise Linux 8.Red Hat Product Security has rated this update as having a security impactof Moderate. A Common Vulnerability Scoring System (CVSS) base score, whichgives a detailed severity rating, is available for each vulnerability fromthe CVE link(s) in the References section.

Topics%20covered

Topics Covered

security advisory Red Hat command execution bug fix DoS moderate severity python

Relevant Releases Architectures

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

Bugs Fixed

1806005 - CVE-2019-20477 PyYAML: command execution through python/object/apply constructor in FullLoader

1807367 - CVE-2020-1747 PyYAML: arbitrary command execution through python/object/new when FullLoader is used

1809065 - CVE-2020-8492 python: wrong backtracking in urllib.request.AbstractBasicAuthHandler allows for a ReDoS

1815643 - test_site is failing on an installed python3

1847416 - python38: Update to new bugfix release to 3.8.3

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

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