vulnerability
Red Hat: CVE-2020-28896: CVE-2020-28896 mutt: Incorrect handling of invalid initial IMAP responses could lead to an authentication attempt over unencrypted connection (Multiple Advisories)
| Severity | CVSS | Published | Added | Modified |
|---|---|---|---|---|
| 3 | (AV:N/AC:H/Au:N/C:P/I:N/A:N) | Nov 23, 2020 | Nov 10, 2021 | Aug 11, 2025 |
Severity
3
CVSS
(AV:N/AC:H/Au:N/C:P/I:N/A:N)
Published
Nov 23, 2020
Added
Nov 10, 2021
Modified
Aug 11, 2025
Description
Mutt before 2.0.2 and NeoMutt before 2020-11-20 did not ensure that $ssl_force_tls was processed if an IMAP server's initial server response was invalid. The connection was not properly closed, and the code could continue attempting to authenticate. This could result in authentication credentials being exposed on an unencrypted connection, or to a machine-in-the-middle.
Solutions
no-fix-redhat-rpm-packageredhat-upgrade-muttredhat-upgrade-mutt-debuginforedhat-upgrade-mutt-debugsource
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