vulnerability

Red Hat: CVE-2020-12398: CVE-2020-12398 Mozilla: Security downgrade with IMAP STARTTLS leads to information leakage (Multiple Advisories)

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Severity
4
CVSS
(AV:N/AC:M/Au:N/C:P/I:N/A:N)
Published
Jun 18, 2020
Added
Jun 23, 2020
Modified
Aug 11, 2025

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.

Solutions

no-fix-redhat-rpm-packageredhat-upgrade-thunderbirdredhat-upgrade-thunderbird-debuginforedhat-upgrade-thunderbird-debugsource

References

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