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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/

Gentoo: GLSA-202008-15: Docker: Information disclosure

A flaw in Docker allowed possible information leakage.

Summary

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

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.

Severity
Severity: Normal
Title: Docker: Information disclosure
Date: August 26, 2020
Bugs: #729208
ID: 202008-15

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

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.

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