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Gentoo Linux Security Advisory GLSA 202003-45
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https://security.gentoo.org/
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Severity: High
Title: PyYAML: Arbitrary code execution
Date: March 19, 2020
Bugs: #659348
ID: 202003-45
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Synopsis
========
A flaw in PyYAML might allow attackers to execute arbitrary code.
Background
==========
PyYAML is a YAML parser and emitter for Python.
Affected packages
=================
——————————————————————-
Package / Vulnerable / Unaffected
——————————————————————-
1 dev-python/pyyaml < 5.1 >= 5.1
Description
===========
It was found that using yaml.load() API on untrusted input could lead
to arbitrary code execution.
Impact
======
A remote attacker could entice a user to process specially crafted
input in an application using yaml.load() from PyYAML, possibly
resulting in execution of arbitrary code with the privileges of the
process or a Denial of Service condition.
Workaround
==========
There is no known workaround at this time.
Resolution
==========
All PyYAML users should upgrade to the latest version:
# emerge –sync
# emerge –ask –oneshot –verbose “>=dev-python/pyyaml-5.1”
References
==========
[ 1 ] CVE-2017-18342
https://nvd.nist.gov/vuln/detail/CVE-2017-18342
Availability
============
This GLSA and any updates to it are available for viewing at
the Gentoo Security Website:
https://security.gentoo.org/glsa/202003-45
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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