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Gentoo Linux Security Advisory GLSA 202008-15
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https://security.gentoo.org/
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Severity: Normal
Title: Docker: Information disclosure
Date: August 26, 2020
Bugs: #729208
ID: 202008-15

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Synopsis
========

A flaw in Docker allowed possible information leakage.

Background
==========

Docker is the world’s leading software containerization platform.

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

——————————————————————-
Package / Vulnerable / Unaffected
——————————————————————-
1 app-emulation/docker < 19.03.12 >= 19.03.12

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

It was found that Docker created network bridges which by default
accept IPv6 router advertisements.

Impact
======

An attacker who gained access to a container with CAP_NET_RAW
capability may be able to to spoof router advertisements, resulting in
information disclosure or denial of service.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All Docker users should upgrade to the latest version:

# emerge –sync
# emerge –ask –oneshot –verbose “>=app-emulation/docker-19.03.12”

References
==========

[ 1 ] CVE-2020-13401
https://nvd.nist.gov/vuln/detail/CVE-2020-13401

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

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

https://security.gentoo.org/glsa/202008-15

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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