Home / mailings [gentoo-announce] [ GLSA 202107-19 ] Jinja: Denial of service
Posted on 08 July 2021
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Gentoo Linux Security Advisory GLSA 202107-19
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https://security.gentoo.org/
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Severity: Low
Title: Jinja: Denial of service
Date: July 08, 2021
Bugs: #768300
ID: 202107-19
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Synopsis
========
An inefficient regular expression could be exploited to cause a Denial
of Service condition.
Background
==========
Jinja is a template engine written in pure Python.
Affected packages
=================
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Package / Vulnerable / Unaffected
-------------------------------------------------------------------
1 dev-python/jinja < 2.11.3 >= 2.11.3
Description
===========
The 'urlize' filter in Jinja utilized an inefficient regular expression
that could be exploited to consume excess CPU.
Impact
======
An attacker could cause a Denial of Service condition via crafted input
to the 'urlize' Jinja filter.
Workaround
==========
There is no known workaround at this time.
Resolution
==========
All Jinja users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose ">=dev-python/jinja-2.11.3"
References
==========
[ 1 ] CVE-2020-28493
https://nvd.nist.gov/vuln/detail/CVE-2020-28493
Availability
============
This GLSA and any updates to it are available for viewing at
the Gentoo Security Website:
https://security.gentoo.org/glsa/202107-19
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 2021 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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