CVE-2020-12398 Information

Description

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.

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Reference

https://bugzilla.mozilla.org/show_bug.cgi?id=1613623 https://usn.ubuntu.com/4421-1/ https://www.mozilla.org/security/advisories/mfsa2020-22/

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

NONE

Base Score

NONE

Base Severity

7.5