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Red Hat Enterprise Linux 8: RHSA-2021-4150 Moderate: DoS Fix in Python36

red hat
Calendar Grey November 9, 2021
Dist Redhat Esm H88
Important upgrade for python36:3.6 on Red Hat Linux boosts safety measures and fixes significant problems. Discover further information inside.
An update for the python36:3.6 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.
Security Fix(es):
* python-pygments: Infinite loop in SML lexer may lead to DoS (CVE-2021-20270)
* python-pygments: ReDoS in multiple lexers (CVE-2021-27291)
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 8.5 Release Notes linked from the References section.

Topics%20covered

Topics Covered

security advisory moderate update bug fix Red Hat Enterprise Linux Denial of Service Python module

References

https://access.redhat.com/security/cve/CVE-2021-20270 https://access.redhat.com/security/cve/CVE-2021-27291 https://access.redhat.com/security/updates/classification#moderate https://docs.redhat.com/en/documentation/red_hat_enterprise_linux/8/html/8.5_release_notes/index

Package List

Red Hat Enterprise Linux AppStream (v. 8):
Source: python-PyMySQL-0.10.1-2.module+el8.4.0+9657+a4b6a102.src.rpm python-distro-1.4.0-2.module+el8.1.0+3334+5cb623d7.src.rpm python-docs-3.6.7-2.module+el8.1.0+3334+5cb623d7.src.rpm python-docutils-0.14-12.module+el8.1.0+3334+5cb623d7.src.rpm python-nose-1.3.7-31.module+el8.5.0+12207+5c5719bc.src.rpm python-pygments-2.2.0-22.module+el8.5.0+10789+e4939b94.src.rpm python-pymongo-3.7.0-1.module+el8.4.0+9670+1849b5f9.src.rpm python-sqlalchemy-1.3.2-2.module+el8.3.0+6646+6b4b10ec.src.rpm python-virtualenv-15.1.0-21.module+el8.5.0+12207+5c5719bc.src.rpm python-wheel-0.31.1-3.module+el8.5.0+12207+5c5719bc.src.rpm python36-3.6.8-38.module+el8.5.0+12207+5c5719bc.src.rpm scipy-1.0.0-21.module+el8.5.0+10916+41bd434d.src.rpm
aarch64: python-pymongo-debuginfo-3.7.0-1.module+el8.4.0+9670+1849b5f9.aarch64.rpm python-pymongo-debugsource-3.7.0-1.module+el8.4.0+9670+1849b5f9.aarch64.rpm python3-bson-3.7.0-1.module+el8.4.0+9670+1849b5f9.aarch64.rpm python3-bson-debuginfo-3.7.0-1.module+el8.4.0+9670+1849b5f9.aarch64.rpm python3-pymongo-3.7.0-1.module+el8.4.0+9670+1849b5f9.aarch64.rpm python3-pymongo-debuginfo-3.7.0-1.module+el8.4.0+9670+1849b5f9.aarch64.rpm python3-pymongo-gridfs-3.7.0-1.module+el8.4.0+9670+1849b5f9.aarch64.rpm

Read the Full Advisory


Advisory ID: RHSA-2021:4150-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2021:4150
Issue date: 2021-11-09

Topic

An update for the python36:3.6 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 moderate update bug fix Red Hat Enterprise Linux Denial of Service Python module

Relevant Releases Architectures

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

Bugs Fixed

1917971 - RFE: virtualenv to prefer wheels from /usr/share/pythonXY-wheels when creating environment for Python X.Y

1922136 - CVE-2021-20270 python-pygments: Infinite loop in SML lexer may lead to DoS

1934199 - python3-scipy package provides scipy.test() that fails with exceptions

1940603 - CVE-2021-27291 python-pygments: ReDoS in multiple lexers

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