A number of security vulnerabilities have been discovered in Mozilla
Security issues in thunderbird could lead to a man-in-the-middle
attack via a spoofed X.509 certificate (CVE-2009-2408).
A vulnerability was found in xmltok_impl.c (expat) that with
specially crafted XML could be exploited and lead to a denial of
service attack. Related to CVE-2009-2625.
This update provides the latest version of Thunderbird which are not
vulnerable to these issues.
The previous mozilla-thunderbird-moztraybiff packages had the wrong
release which prevented it to be upgraded (#53129). The new packages
addresses this problem...