CVE-2020-14954

Publication date 21 June 2020

Last updated 25 August 2025

Ubuntu priority

Medium

Why this priority?

Cvss 3 Severity Score

5.9 · Medium

Score breakdown

Description

Mutt before 1.14.4 and NeoMutt before 2020-06-19 have a STARTTLS buffering issue that affects IMAP, SMTP, and POP3. When a server sends a "begin TLS" response, the client reads additional data (e.g., from a man-in-the-middle attacker) and evaluates it in a TLS context, aka "response injection."

Status

Package Ubuntu Release Status
mutt 25.04 plucky
Not affected
24.10 oracular
Not affected
24.04 LTS noble
Not affected
23.10 mantic
Not affected
23.04 lunar
Not affected
22.10 kinetic
Not affected
22.04 LTS jammy
Not affected
21.10 impish
Not affected
21.04 hirsute
Not affected
20.10 groovy
Not affected
20.04 LTS focal
Fixed 1.13.2-1ubuntu0.2
19.10 eoan
Fixed 1.10.1-2.1ubuntu0.2
18.04 LTS bionic
Fixed 1.9.4-3ubuntu0.3
16.04 LTS xenial
Fixed 1.5.24-1ubuntu0.4
14.04 LTS trusty Not in release
neomutt 25.04 plucky
Not affected
24.10 oracular
Not affected
24.04 LTS noble
Not affected
23.10 mantic
Not affected
23.04 lunar
Not affected
22.10 kinetic
Not affected
22.04 LTS jammy
Not affected
21.10 impish
Not affected
21.04 hirsute
Not affected
20.10 groovy
Not affected
20.04 LTS focal
Fixed 20191207+dfsg.1-1.1ubuntu0.1~esm1
19.10 eoan Ignored end of life
18.04 LTS bionic
Fixed 20171215+dfsg.1-1ubuntu0.1~esm1
16.04 LTS xenial Not in release
14.04 LTS trusty Not in release

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Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package Patch details
mutt
neomutt

Severity score breakdown

Parameter Value
Base score 5.9 · Medium
Attack vector Network
Attack complexity High
Privileges required None
User interaction None
Scope Unchanged
Confidentiality None
Integrity impact High
Availability impact None
Vector CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N

References

Related Ubuntu Security Notices (USN)

    • USN-4403-1
    • Mutt vulnerability and regression
    • 24 June 2020
    • USN-7204-1
    • NeoMutt vulnerabilities
    • 15 January 2025

Other references