A thunderbird security update has been released for both Debian GNU/Linux 9 and 10 to address multiple security issues that could result in denial of service or potentially the execution of arbitrary code.

DSA 4656-1: thunderbird security update

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Debian Security Advisory DSA-4656-1 security@debian.org
https://www.debian.org/security/ Moritz Muehlenhoff
April 13, 2020 https://www.debian.org/security/faq
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Package : thunderbird
CVE ID : CVE-2020-6819 CVE-2020-6820 CVE-2020-6821 CVE-2020-6822
CVE-2020-6825

Multiple security issues have been found in Thunderbird which could result
in denial of service or potentially the execution of arbitrary code.

For the oldstable distribution (stretch), these problems have been fixed
in version 1:68.7.0-1~deb9u1.

For the stable distribution (buster), these problems have been fixed in
version 1:68.7.0-1~deb10u1.

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/