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CVE-2021-29969

Published: 5 August 2021

If Thunderbird was configured to use STARTTLS for an IMAP connection, and an attacker injected IMAP server responses prior to the completion of the STARTTLS handshake, then Thunderbird didn't ignore the injected data. This could have resulted in Thunderbird showing incorrect information, for example the attacker could have tricked Thunderbird to show folders that didn't exist on the IMAP server. This vulnerability affects Thunderbird < 78.12.

Priority

Medium

CVSS 3 base score: 5.9

Status

Package Release Status
thunderbird
Launchpad, Ubuntu, Debian
bionic
Released (1:78.13.0+build1-0ubuntu0.18.04.1)
focal
Released (1:78.13.0+build1-0ubuntu0.20.04.2)
groovy Ignored
(reached end-of-life)
hirsute
Released (1:78.13.0+build1-0ubuntu0.21.04.2)
impish
Released (1:78.12.0+build2-0ubuntu1)
jammy
Released (1:78.12.0+build2-0ubuntu1)
trusty Does not exist

upstream
Released (78.12)
xenial Needed