A thunderbird security update has been released for Debian GNU/Linux 8 LTS to address multiple security issues.

DLA 2247-1: thunderbird security update

Package : thunderbird
Version : 1:68.9.0-1~deb8u2
CVE ID : CVE-2020-12398 CVE-2020-12399 CVE-2020-12405 CVE-2020-12406
CVE-2020-12410

Multiple security issues have been found in Thunderbird which could
result in the setup of a non-encrypted IMAP connection, denial of service
or potentially the execution of arbitrary code.

For Debian 8 "Jessie", these problems have been fixed in version
1:68.9.0-1~deb8u2.

NOTE: 1:68.9.0esr-1~deb8u2 fixes an i386 build error in the otherwise
identical 1:68.9.0esr-1~deb8u1 that was uploaded but not announced.

We recommend that you upgrade your thunderbird packages.

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