A Mozilla Firefox security update has been released for Gentoo Linux.

GLSA 202101-04 : Mozilla Firefox: Remote code execution

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Gentoo Linux Security Advisory GLSA 202101-04
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  https://security.gentoo.org/
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Severity: Normal
Title: Mozilla Firefox: Remote code execution
Date: January 10, 2021
Bugs: #764161
ID: 202101-04

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Synopsis
=======
A use-after-free in Mozilla Firefox's SCTP handling may allow remote
code execution.

Background
=========
Mozilla Firefox is a popular open-source web browser from the Mozilla
project.

Affected packages
================
-------------------------------------------------------------------
Package / Vulnerable / Unaffected
-------------------------------------------------------------------
1 www-client/firefox < 84.0.2 &rt;= 78.6.1:0/esr78
&rt;= 84.0.2
2 www-client/firefox-bin < 84.0.2 &rt;= 78.6.1:0/esr78
&rt;= 84.0.2
-------------------------------------------------------------------
2 affected packages

Description
==========
A use-after-free bug was discovered in Mozilla Firefox's handling of
SCTP.

Impact
=====
A remote attacker could possibly execute arbitrary code with the
privileges of the process, or cause a Denial of Service condition.

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

Resolution
=========
All Firefox ESR users should upgrade to the latest version:

# emerge --sync
# emerge --ask --oneshot -v "&rt;=www-client/firefox-78.6.1:0/esr78"

All Firefox ESR binary users should upgrade to the latest version:

# emerge --sync
# emerge --ask --oneshot -v "&rt;=www-client/firefox-bin-78.6.1:0/esr78"

All Firefox users should upgrade to the latest version:

# emerge --sync
# emerge --ask --oneshot --verbose "&rt;=www-client/firefox-84.0.2"

All Firefox binary users should upgrade to the latest version:

# emerge --sync
# emerge --ask --oneshot --verbose "&rt;=www-client/firefox-bin-84.0.2"

References
=========
[ 1 ] CVE-2020-16044
  https://nvd.nist.gov/vuln/detail/CVE-2020-16044
[ 2 ] MFSA-2021-01
  https://www.mozilla.org/en-US/security/advisories/mfsa2021-01/

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

  https://security.gentoo.org/glsa/202101-04

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 2021 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