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MitreCVE-2020-28896

HistoryNov 23, 2020 - 7:15 p.m.

CVE-2020-28896

2020-11-2319:15:11

CWE-755

CWE-287

mitre

web.nvd.nist.gov

228

cve-2020-28896

mutt

neomutt

imap

server response

authentication credentials

unencrypted connection

man-in-the-middle

CVSS2

2.6

Attack Vector

NETWORK

Attack Complexity

HIGH

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

NONE

Availability Impact

NONE

AV:N/AC:H/Au:N/C:P/I:N/A:N

CVSS3

5.3

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction

REQUIRED

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

NONE

Availability Impact

NONE

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

AI Score

5.6

Confidence

High

EPSS

0.003

Percentile

69.9%

JSON

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.

Affected configurations

Nvd

Node

muttmuttRange<2.0.2

neomuttneomuttRange<2020-11-20

Node

debiandebian_linuxMatch9.0

VendorProductVersionCPE
muttmutt*cpe:2.3:a:mutt:mutt:*:*:*:*:*:*:*:*
neomuttneomutt*cpe:2.3:a:neomutt:neomutt:*:*:*:*:*:*:*:*
debiandebian_linux9.0cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*

Vendor	Product	Version	CPE
mutt	mutt	*	cpe:2.3:a:mutt:mutt::::::::
neomutt	neomutt	*	cpe:2.3:a:neomutt:neomutt::::::::
debian	debian_linux	9.0	cpe:2.3:o:debian:debian_linux:9.0:::::::*