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Gentoo Linux Security Advisory                           GLSA 202008-10
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                                           https://security.gentoo.org/
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 Severity: Normal
    Title: Chromium, Google Chrome: Heap buffer overflow
     Date: August 25, 2020
     Bugs: #737942
       ID: 202008-10

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Synopsis
=======

A vulnerablity has been found in Chromium and Google Chrome that could
allow a remote attacker to execute arbitrary code.

Background
=========

Chromium is an open-source browser project that aims to build a safer,
faster, and more stable way for all users to experience the web.

Google Chrome is one fast, simple, and secure browser for all your
devices.

Affected packages
================
    -------------------------------------------------------------------
     Package              /     Vulnerable     /            Unaffected
    -------------------------------------------------------------------
  1  www-client/chromium      < 84.0.4147.135        >= 84.0.4147.135
  2  www-client/google-chrome
                              < 84.0.4147.135        >= 84.0.4147.135
    -------------------------------------------------------------------
     2 affected packages

Description
==========
A buffer overflow has been discovered in Chromium and Google Chrome's
SwiftShader component.

Impact
=====
A remote attacker, by enticing a user to visit a specially crafted
website, could execute arbitrary code with the privileges of the
process.

Workaround
=========
There is no known workaround at this time.

Resolution
=========
All Chromium users should upgrade to the latest version:

  # emerge --sync
  # emerge --ask --oneshot -v ">=www-client/chromium-84.0.4147.135"

All Google Chrome users should upgrade to the latest version:

  # emerge --sync
  # emerge -a --oneshot -v ">=www-client/google-chrome-84.0.4147.135"

References
=========
[ 1 ] CVE-2020-6556
      https://nvd.nist.gov/vuln/detail/CVE-2020-6556
[ 2 ] Upstream advisory
      https://chromereleases.googleblog.com/2020/08/stable-channel-update-for-desktop_18.html

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

 https://security.gentoo.org/glsa/202008-10

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/