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CVE-2021-38502

Published: 3 November 2021

Thunderbird ignored the configuration to require STARTTLS security for an SMTP connection. A MITM could perform a downgrade attack to intercept transmitted messages, or could take control of the authenticated session to execute SMTP commands chosen by the MITM. If an unprotected authentication method was configured, the MITM could obtain the authentication credentials, too. This vulnerability affects Thunderbird < 91.2.

Priority

Medium

CVSS 3 base score: 5.9

Status

Package Release Status
thunderbird
Launchpad, Ubuntu, Debian
bionic
Released (1:91.5.0+build1-0ubuntu0.18.04.1)
focal
Released (1:91.5.0+build1-0ubuntu0.20.04.1)
hirsute Ignored
(reached end-of-life)
impish
Released (1:91.3.1+build1-0ubuntu0.21.10.1)
jammy
Released (1:91.3.1+build1-0ubuntu1)
trusty Ignored
(out of standard support)
upstream
Released (91.2)
xenial Needs triage