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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/