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Published: 13 April 2021

Thunderbird did not check if the user ID associated with an OpenPGP key has a valid self signature. An attacker may create a crafted version of an OpenPGP key, by either replacing the original user ID, or by adding another user ID. If Thunderbird imports and accepts the crafted key, the Thunderbird user may falsely conclude that the false user ID belongs to the correspondent. This vulnerability affects Thunderbird < 78.9.1.



CVSS 3 base score: 4.3


Package Release Status
Launchpad, Ubuntu, Debian
Released (78.9.1)
Ubuntu 21.10 (Impish Indri)
Released (1:78.11.0+build1-0ubuntu2)
Ubuntu 21.04 (Hirsute Hippo)
Released (1:78.11.0+build1-0ubuntu0.21.04.2)
Ubuntu 20.04 LTS (Focal Fossa)
Released (1:78.11.0+build1-0ubuntu0.20.04.2)
Ubuntu 18.04 LTS (Bionic Beaver)
Released (1:78.11.0+build1-0ubuntu0.18.04.2)
Ubuntu 16.04 ESM (Xenial Xerus) Needs triage

Ubuntu 14.04 ESM (Trusty Tahr) Does not exist