A thunderbird security update has been released for Debian GNU/Linux 10 to address multiple security issues.

DSA 4770-1: thunderbird security update

- -------------------------------------------------------------------------
Debian Security Advisory DSA-4770-1 security@debian.org
  https://www.debian.org/security/ Moritz Muehlenhoff
October 06, 2020   https://www.debian.org/security/faq
- -------------------------------------------------------------------------

Package : thunderbird
CVE ID : CVE-2020-15673 CVE-2020-15676 CVE-2020-15677
CVE-2020-15678

Multiple security issues have been found in Thunderbird, which may lead
to the execution of arbitrary code or denial of service.

Debian follows the Thunderbird upstream releases. Support for the 68.x
series has ended, so starting with this update we're now following
the 78.x releases.

The 78.x series discontinues support for some addons. Also, starting
with 78, Thunderbird supports OpenPGP natively. If you are currently
using the Enigmail addon for PGP, please refer to the included NEWS
and README.Debian.gz files for information on how to migrate your
keys.

For the stable distribution (buster), this problem has been fixed in
version 1:78.3.1-2~deb10u2.

We recommend that you upgrade your thunderbird packages.

For the detailed security status of thunderbird please refer to
its security tracker page at:
  https://security-tracker.debian.org/tracker/thunderbird

Further information about Debian Security Advisories, how to apply
these updates to your system and frequently asked questions can be
found at:   https://www.debian.org/security/