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Red Hat 8: RHSA-2021:1761 Moderate: Python2.7 Buffer Overflow

red hat
Calendar Grey May 18, 2021
Dist Redhat Esm H88
Cautious Red Hat notice regarding python27:2.7 enhancements for security and resolutions addressing vulnerabilities such as stack corruption.
An update for the python27:2.7 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 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 connectorsfor MySQL and PostgreSQL.
Security Fix(es):
* python: CRLF injection via HTTP request method in httplib/http.client (CVE-2020-26116)
* python-urllib3: CRLF injection via HTTP request method (CVE-2020-26137)
* python-lxml: mXSS due to the use of improper parser (CVE-2020-27783)
* python: Stack-based buffer overflow in PyCArg_repr in _ctypes/callproc.c (CVE-2021-3177)
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 8.4 Release Notes linked from the References section.

Topics%20covered

Topics Covered

security advisory moderate security update Red Hat buffer overflow software update moderate severity python injection module update Python 2.7

References

https://access.redhat.com/security/cve/CVE-2020-26116 https://access.redhat.com/security/cve/CVE-2020-26137 https://access.redhat.com/security/cve/CVE-2020-27783 https://access.redhat.com/security/cve/CVE-2021-3177 https://access.redhat.com/security/updates/classification/#moderate https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/8/html/8.4_release_notes/

Package List

Red Hat Enterprise Linux AppStream (v. 8):
Source: Cython-0.28.1-7.module+el8.1.0+3111+de3f2d8e.src.rpm PyYAML-3.12-16.module+el8.1.0+3111+de3f2d8e.src.rpm babel-2.5.1-9.module+el8.1.0+3111+de3f2d8e.src.rpm numpy-1.14.2-16.module+el8.4.0+9406+221a4565.src.rpm pytest-3.4.2-13.module+el8.1.0+3111+de3f2d8e.src.rpm python-PyMySQL-0.8.0-10.module+el8.1.0+3111+de3f2d8e.src.rpm python-attrs-17.4.0-10.module+el8.1.0+3111+de3f2d8e.src.rpm python-backports-1.0-16.module+el8.4.0+9193+f3daf6ef.src.rpm python-backports-ssl_match_hostname-3.5.0.1-12.module+el8.4.0+9193+f3daf6ef.src.rpm python-chardet-3.0.4-10.module+el8.1.0+3111+de3f2d8e.src.rpm python-coverage-4.5.1-4.module+el8.1.0+3111+de3f2d8e.src.rpm python-dns-1.15.0-10.module+el8.1.0+3111+de3f2d8e.src.rpm python-docs-2.7.16-2.module+el8.1.0+3111+de3f2d8e.src.rpm python-docutils-0.14-12.module+el8.1.0+3111+de3f2d8e.src.rpm python-funcsigs-1.0.2-13.module+el8.1.0+3111+de3f2d8e.src.rpm python-idna-2.5-7.module+el8.1.0+3111+de3f2d8e.src.rpm python-ipaddress-1.0.18-6.module+el8.1.0+3111+de3f2d8e.src.rpm python-jinja2-2.10-8.module+el8.1.0+3111+de3f2d8e.src.rpm python-lxml-4.2.3-4.module+el8.4.0+9319+a932af88.src.rpm python-markupsafe-0.23-19.module+el8.1.0+3111+de3f2d8e.src.rpm

Read the Full Advisory


Advisory ID: RHSA-2021:1761-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2021:1761
Issue date: 2021-05-18

Topic

An update for the python27:2.7 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 security update Red Hat buffer overflow software update moderate severity python injection module update Python 2.7

Relevant Releases Architectures

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

Bugs Fixed

1883014 - CVE-2020-26116 python: CRLF injection via HTTP request method in httplib/http.client

1883632 - CVE-2020-26137 python-urllib3: CRLF injection via HTTP request method

1886754 - python27:2.7/python2: Update the python interpreter to its last upstream release, 2.7.18

1901633 - CVE-2020-27783 python-lxml: mXSS due to the use of improper parser

1918168 - CVE-2021-3177 python: Stack-based buffer overflow in PyCArg_repr in _ctypes/callproc.c

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