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Gentoo Linux Security Advisory                           GLSA 202101-14
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                                           https://security.gentoo.org/
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 Severity: Normal
    Title: Mozilla Thunderbird: Remote code execution
     Date: January 22, 2021
     Bugs: #765088
       ID: 202101-14

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Synopsis
=======
Multiple vulnerabilities have been found in Mozilla Thunderbird, the
worst of which could result in the arbitrary execution of code.

Background
=========
Mozilla Thunderbird is a popular open-source email client from the
Mozilla project.

Affected packages
================
    -------------------------------------------------------------------
     Package              /     Vulnerable     /            Unaffected
    -------------------------------------------------------------------
  1  mail-client/thunderbird      < 78.6.1                  >= 78.6.1
  2  mail-client/thunderbird-bin
                                  < 78.6.1                  >= 78.6.1
    -------------------------------------------------------------------
     2 affected packages

Description
==========
A use-after-free bug was discovered in Mozilla Thunderbird 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 Mozilla Thunderbird users should upgrade to the latest version:

  # emerge --sync
  # emerge --ask --oneshot --verbose ">=mail-client/thunderbird-78.6.1"

All Mozilla Thunderbird binary users should upgrade to the latest
version:

  # emerge --sync
  # emerge --ask --oneshot -v ">=mail-client/thunderbird-bin-78.6.1"

References
=========
[ 1 ] CVE-2020-16044
      https://nvd.nist.gov/vuln/detail/CVE-2020-16044
[ 2 ] MFSA-2021-02
      https://www.mozilla.org/en-US/security/advisories/mfsa2021-02/

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

 https://security.gentoo.org/glsa/202101-14

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/