Ubuntu: (Multiple Advisories) (CVE-2021-29949): Thunderbird vulnerabilities

Description
When loading the shared library that provides the OTR protocol implementation, Thunderbird will initially attempt to open it using a filename that isn't distributed by Thunderbird. If a computer has already been infected with a malicious library of the alternative filename, and the malicious library has been copied to a directory that is contained in the search path for executable libraries, then Thunderbird will load the incorrect library. This vulnerability affects Thunderbird < 78.9.1.
Solution(s)
ubuntu-upgrade-thunderbird

References
USN-4717-1
USN-4893-1
USN-4926-1
USN-4978-1
USN-4995-1
USN-4995-2
CVE-2021-29949


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