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Gentoo Linux Security Advisory GLSA 202005-09
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https://security.gentoo.org/
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Severity: Normal
Title: Python: Denial of Service
Date: May 14, 2020
Bugs: #707822
ID: 202005-09

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Synopsis
========

A vulnerability in Python could lead to a Denial of Service condition.

Background
==========

Python is an interpreted, interactive, object-oriented programming
language.

Affected packages
=================

——————————————————————-
Package / Vulnerable / Unaffected
——————————————————————-
1 dev-lang/python < 2.7.18:2.7 >= 2.7.18:2.7
< 3.6.10-r2:3.6 >= 3.6.10-r2:3.6
< 3.7.7-r2:3.7 >= 3.7.7-r2:3.7
< 3.8.2-r2:3.8 >= 3.8.2-r2:3.8

Description
===========

An issue was discovered in urllib.request.AbstractBasicAuthHandler
which allowed a remote attacker to send malicious data causing
extensive regular expression backtracking.

Impact
======

An attacker could cause a possible Denial of Service condition.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All Python 2.7 users should upgrade to the latest version:

# emerge –sync
# emerge –ask –oneshot –verbose “>=dev-lang/python-2.7.18:2.7”

All Python 3.6 users should upgrade to the latest version:

# emerge –sync
# emerge –ask –oneshot –verbose “>=dev-lang/python-3.6.10-r2:3.6”

All Python 3.7 users should upgrade to the latest version:

# emerge –sync
# emerge –ask –oneshot –verbose “>=dev-lang/python-3.7.7-r2:3.7”

All Python 3.8 users should upgrade to the latest version:

# emerge –sync
# emerge –ask –oneshot –verbose “>=dev-lang/python-3.8.2-r2:3.8”

References
==========

[ 1 ] CVE-2020-8492
https://nvd.nist.gov/vuln/detail/CVE-2020-8492

Availability
============

This GLSA and any updates to it are available for viewing at
the Gentoo Security Website:

https://security.gentoo.org/glsa/202005-09

Concerns?
=========

Security is a primary focus of Gentoo Linux and ensuring the
confidentiality and security of our users’ machines is of utmost
importance to us. Any security concerns should be addressed to
security@gentoo.org or alternatively, you may file a bug at
https://bugs.gentoo.org.

License
=======

Copyright 2020 Gentoo Foundation, Inc; referenced text
belongs to its owner(s).

The contents of this document are licensed under the
Creative Commons – Attribution / Share Alike license.

https://creativecommons.org/licenses/by-sa/2.5

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