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.

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.

Mozilla: An attacker may use Thunderbird's OpenPGP key refresh mechanism to poison an existing key Mozilla: A crafted OpenPGP key with an invalid user ID could be used to confuse the user Mozilla: Inability to send encrypted OpenPGP email after importing a crafted OpenPGP key Mozilla: Thunderbird might execute an alternative OTR library Mozilla: Logic issue potentially leaves key material unlocked

Mozilla: An attacker may use Thunderbird's OpenPGP key refresh mechanism to poison an existing key Mozilla: A crafted OpenPGP key with an invalid user ID could be used to confuse the user Mozilla: Inability to send encrypted OpenPGP email after importing a crafted OpenPGP key Mozilla: Thunderbird might execute an alternative OTR library Mozilla: Logic issue potentially leaves key material unlocked

Affected: Ubuntu:18.04:LTS: thunderbird, Ubuntu:20.04:LTS: thunderbird

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.