CVE-2020-12398

MEDIUM

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.

References

https://bugzilla.mozilla.org/show_bug.cgi?id=1613623

https://usn.ubuntu.com/4421-1/

https://www.mozilla.org/security/advisories/mfsa2020-22/

Details

Source: MITRE

Published: 2020-07-09

Updated: 2020-07-22

Type: CWE-311

Risk Information

CVSS v2.0

Base Score: 4.3

Vector: AV:N/AC:M/Au:N/C:P/I:N/A:N

Impact Score: 2.9

Exploitability Score: 8.6

Severity: MEDIUM

CVSS v3.0

Base Score: 7.5

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

Impact Score: 3.6

Exploitability Score: 3.9

Severity: HIGH