5.3

CVE-2020-28896: debian debian_linux Improper Authentication

CVSS: 5.3v3.1MediumModified
AliasesMGASA-2020-0448SUSE-SU-2020:14551-1SUSE-SU-2020:3568-1
Published 23-11-2020Last modified 04-08-2024
Open JSON

Vulnerability summary

CVE-2020-28896 is a medium (CVSS 5.3) Improper Authentication vulnerability in debian debian_linux. EPSS estimates a 2.35% chance of exploitation in the next 30 days, higher than 83.4% of scored vulnerabilities.

Overall risk
22/100
0100
Low · default modelHow is this calculated?
CVSS score
5.3/10
010
Medium · v3.1 (NVD)
EPSS score
2.35%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 7 · Related 6
OPENSUSE-SU-2020:2127-1OPENSUSE-SU-2020:2157-1OPENSUSE-SU-2020:2158-1OPENSUSE-SU-2024:11069-1OPENSUSE-SU-2024:11079-1RHSA-2021:4181

Timeline

  1. 23-11-2020
    PublishedVulnerability first disclosed.
  2. 04-08-2024
    Last modifiedVulnerability information updated.

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 metrics

4 scores · 3 sources · 2 versions

EPSS trend

Probability

2.35%

Chance of exploitation in the next 30 days

Percentile

83%

Versus all other CVEs

30-day change

0.00 pp

From 2.35% on 19-09-2026

19-09-202619-10-2026
EPSS score
2.35%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Suse25 products
  • mutt&distro=HPE Helion OpenStack 8< 1.10.1-55.18.1
  • mutt&distro=SUSE Enterprise Storage 5< 1.10.1-55.18.1
  • mutt&distro=SUSE Linux Enterprise High Performance Computing 15-ESPOS< 1.10.1-3.11.1
  • mutt&distro=SUSE Linux Enterprise High Performance Computing 15-LTSS< 1.10.1-3.11.1
  • mutt&distro=SUSE Linux Enterprise Module for Basesystem 15 SP1< 1.10.1-3.11.1
Debian3 products
  • mutt< 2.0.2-1 | < 1.7.2-1+deb9u4
  • neomutt< 20201120+dfsg.1-1
  • debian_linuxEOL9.0
Opensuse2 products
  • mutt&distro=openSUSE Leap 15.1< 1.10.1-lp151.2.6.1
  • mutt&distro=openSUSE Leap 15.2< 1.10.1-lp152.3.6.1
Ubuntu2 products
  • mutt< 1.5.24-1ubuntu0.5 | < 1.9.4-3ubuntu0.4 | < 1.13.2-1ubuntu0.3
  • neomutt< 20171215+dfsg.1-1ubuntu0.1~esm1 | < 20191207+dfsg.1-1.1ubuntu0.1~esm1
Mageia1 product
  • mutt< 1.11.4-1.4.mga7
Mutt1 product
Neomutt1 product

7 vendors · 35 products

References

22 links
Show all 22 references