Updated thunderbird packages fix security vulnerabilities:
Stack corruption due to incorrect number of arguments in WebRTC code. (CVE-2019-13722)
Buffer overflow in plain text serializer. (CVE-2019-17005)
Use-after-free in worker destruction. (CVE-2019-17008)
Updater temporary files accessible to unprivileged processes. (CVE-2019-17009)
Use-after-free when performing device orientation checks. (CVE-2019-17010)
Use-after-free when retrieving a document in antitracking. (CVE-2019-17011)
Memory safety bugs fixed in Firefox 71, Firefox ESR 68.3, and Thunderbird 68.3. (CVE-2019-17012)