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

For Debian 9 stretch, these problems have been fixed in version 1:68.11.0-1~deb9u1.

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