CVE-2020-28896 Information

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.

CVSS Vector

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

Reference

https://github.com/neomutt/neomutt/commit/9c36717a3e2af1f2c1b7242035455ec8112b4b06 https://gitlab.com/muttmua/mutt/-/commit/d92689088dfe80a290ec836e292376e2d9984f8f https://github.com/neomutt/neomutt/releases/tag/20201120 https://gitlab.com/muttmua/mutt/-/commit/04b06aaa3e0cc0022b9b01dbca2863756ebbf59a https://lists.debian.org/debian-lts-announce/2020/11/msg00048.html https://security.gentoo.org/glsa/202101-32

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction Required

NONE

Scope

REQUIRED

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

NONE

Base Score

NONE

Base Severity

5.3