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Gentoo Linux Security Advisory 202101-04

Gentoo Linux Security Advisory 202101-04
Posted Jan 11, 2021
Authored by Gentoo | Site security.gentoo.org

Gentoo Linux Security Advisory 202101-4 - A use-after-free in Mozilla Firefox's SCTP handling may allow remote code execution. Versions less than 84.0.2 are affected.

tags | advisory, remote, code execution
systems | linux, gentoo
advisories | CVE-2020-16044
SHA-256 | 532dcad0f235bece88d5d6f7724e5c9c6da6508eaf0d5ab85facd14186537f72

Gentoo Linux Security Advisory 202101-04

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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 >= 78.6.1:0/esr78
>= 84.0.2
2 www-client/firefox-bin < 84.0.2 >= 78.6.1:0/esr78
>= 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 ">=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 ">=www-client/firefox-bin-78.6.1:0/esr78"

All Firefox users should upgrade to the latest version:

# emerge --sync
# emerge --ask --oneshot --verbose ">=www-client/firefox-84.0.2"

All Firefox binary users should upgrade to the latest version:

# emerge --sync
# emerge --ask --oneshot --verbose ">=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

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