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CVE-2020-12398

Published: 9 June 2020

If Thunderbird is configured to use STARTTLS for an IMAP server, and the server sends a PREAUTH response, then Thunderbird will continue with an unencrypted connection, causing email data to be sent without protection. This vulnerability affects Thunderbird < 68.9.0.

Priority

Medium

Cvss 3 Severity Score

7.5

Score breakdown

Status

Package Release Status
thunderbird
Launchpad, Ubuntu, Debian
bionic
Released (1:68.10.0+build1-0ubuntu0.18.04.1)
eoan
Released (1:68.10.0+build1-0ubuntu0.19.10.1)
focal
Released (1:68.10.0+build1-0ubuntu0.20.04.1)
trusty Does not exist

upstream
Released (68.9.0)
xenial
Released (1:68.10.0+build1-0ubuntu0.16.04.1)

Severity score breakdown

Parameter Value
Base score 7.5
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Scope Unchanged
Confidentiality High
Integrity impact None
Availability impact None
Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N