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Red Hat Security Advisory 2021-1633-01

Red Hat Security Advisory 2021-1633-01
Posted May 19, 2021
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2021-1633-01 - 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. Issues addressed include buffer overflow and crlf injection vulnerabilities.

tags | advisory, overflow, vulnerability, python
systems | linux, redhat
advisories | CVE-2020-26116, CVE-2020-27619, CVE-2021-23336, CVE-2021-3177
SHA-256 | 77f031fb8c03890f2934f6440758be90e94ff9fb4367c2fe3507b9060baae44c

Red Hat Security Advisory 2021-1633-01

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

Synopsis: Moderate: python3 security update
Advisory ID: RHSA-2021:1633-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2021:1633
Issue date: 2021-05-18
CVE Names: CVE-2020-26116 CVE-2020-27619 CVE-2021-3177
CVE-2021-23336
====================================================================
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: CRLF injection via HTTP request method in httplib/http.client
(CVE-2020-26116)

* python: Unsafe use of eval() on data retrieved via HTTP in the test suite
(CVE-2020-27619)

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

* python: Web cache poisoning via urllib.parse.parse_qsl and
urllib.parse.parse_qs by using a semicolon in query parameters
(CVE-2021-23336)

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.

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/):

1868003 - python36: Support for alternative architectures' names in Python importlib
1883014 - CVE-2020-26116 python: CRLF injection via HTTP request method in httplib/http.client
1889886 - CVE-2020-27619 python: Unsafe use of eval() on data retrieved via HTTP in the test suite
1917691 - python3: pathfix.py does not support -a and -k options
1918168 - CVE-2021-3177 python: Stack-based buffer overflow in PyCArg_repr in _ctypes/callproc.c
1928904 - CVE-2021-23336 python: Web cache poisoning via urllib.parse.parse_qsl and urllib.parse.parse_qs by using a semicolon in query parameters

6. Package List:

Red Hat Enterprise Linux AppStream (v. 8):

aarch64:
platform-python-debug-3.6.8-37.el8.aarch64.rpm
platform-python-devel-3.6.8-37.el8.aarch64.rpm
python3-debuginfo-3.6.8-37.el8.aarch64.rpm
python3-debugsource-3.6.8-37.el8.aarch64.rpm
python3-idle-3.6.8-37.el8.aarch64.rpm
python3-tkinter-3.6.8-37.el8.aarch64.rpm

ppc64le:
platform-python-debug-3.6.8-37.el8.ppc64le.rpm
platform-python-devel-3.6.8-37.el8.ppc64le.rpm
python3-debuginfo-3.6.8-37.el8.ppc64le.rpm
python3-debugsource-3.6.8-37.el8.ppc64le.rpm
python3-idle-3.6.8-37.el8.ppc64le.rpm
python3-tkinter-3.6.8-37.el8.ppc64le.rpm

s390x:
platform-python-debug-3.6.8-37.el8.s390x.rpm
platform-python-devel-3.6.8-37.el8.s390x.rpm
python3-debuginfo-3.6.8-37.el8.s390x.rpm
python3-debugsource-3.6.8-37.el8.s390x.rpm
python3-idle-3.6.8-37.el8.s390x.rpm
python3-tkinter-3.6.8-37.el8.s390x.rpm

x86_64:
platform-python-3.6.8-37.el8.i686.rpm
platform-python-debug-3.6.8-37.el8.i686.rpm
platform-python-debug-3.6.8-37.el8.x86_64.rpm
platform-python-devel-3.6.8-37.el8.i686.rpm
platform-python-devel-3.6.8-37.el8.x86_64.rpm
python3-debuginfo-3.6.8-37.el8.i686.rpm
python3-debuginfo-3.6.8-37.el8.x86_64.rpm
python3-debugsource-3.6.8-37.el8.i686.rpm
python3-debugsource-3.6.8-37.el8.x86_64.rpm
python3-idle-3.6.8-37.el8.i686.rpm
python3-idle-3.6.8-37.el8.x86_64.rpm
python3-test-3.6.8-37.el8.i686.rpm
python3-tkinter-3.6.8-37.el8.i686.rpm
python3-tkinter-3.6.8-37.el8.x86_64.rpm

Red Hat Enterprise Linux BaseOS (v. 8):

Source:
python3-3.6.8-37.el8.src.rpm

aarch64:
platform-python-3.6.8-37.el8.aarch64.rpm
python3-debuginfo-3.6.8-37.el8.aarch64.rpm
python3-debugsource-3.6.8-37.el8.aarch64.rpm
python3-libs-3.6.8-37.el8.aarch64.rpm
python3-test-3.6.8-37.el8.aarch64.rpm

ppc64le:
platform-python-3.6.8-37.el8.ppc64le.rpm
python3-debuginfo-3.6.8-37.el8.ppc64le.rpm
python3-debugsource-3.6.8-37.el8.ppc64le.rpm
python3-libs-3.6.8-37.el8.ppc64le.rpm
python3-test-3.6.8-37.el8.ppc64le.rpm

s390x:
platform-python-3.6.8-37.el8.s390x.rpm
python3-debuginfo-3.6.8-37.el8.s390x.rpm
python3-debugsource-3.6.8-37.el8.s390x.rpm
python3-libs-3.6.8-37.el8.s390x.rpm
python3-test-3.6.8-37.el8.s390x.rpm

x86_64:
platform-python-3.6.8-37.el8.x86_64.rpm
python3-debuginfo-3.6.8-37.el8.i686.rpm
python3-debuginfo-3.6.8-37.el8.x86_64.rpm
python3-debugsource-3.6.8-37.el8.i686.rpm
python3-debugsource-3.6.8-37.el8.x86_64.rpm
python3-libs-3.6.8-37.el8.i686.rpm
python3-libs-3.6.8-37.el8.x86_64.rpm
python3-test-3.6.8-37.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-2020-26116
https://access.redhat.com/security/cve/CVE-2020-27619
https://access.redhat.com/security/cve/CVE-2021-3177
https://access.redhat.com/security/cve/CVE-2021-23336
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/

8. Contact:

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

Copyright 2021 Red Hat, Inc.
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