[USN-4403-1] Mutt vulnerability and regression

Leonidas S. Barbosa leo.barbosa at canonical.com
Wed Jun 24 18:23:41 UTC 2020

Ubuntu Security Notice USN-4403-1
June 24, 2020

mutt vulnerability and regression

A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 20.04 LTS
- Ubuntu 19.10
- Ubuntu 18.04 LTS
- Ubuntu 16.04 LTS
- Ubuntu 12.04 ESM


Mutt could be made to enable MITM attacks if it received a specially crafted

Software Description:
- mutt: text-based mailreader supporting MIME, GPG, PGP and threading


It was discovered that Mutt incorrectly handled certain requests.
An attacker could possibly use this issue to enable MITM attacks.

This update also address a regression caused in the last update USN-4401-1.
It only affected Ubuntu 12.04 ESM, Ubuntu 16.04 LTS, Ubuntu 18.04 LTS and Ubuntu 19.10.

Update instructions:

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 20.04 LTS:
  mutt                            1.13.2-1ubuntu0.2

Ubuntu 19.10:
  mutt                            1.10.1-2.1ubuntu0.2

Ubuntu 18.04 LTS:
  mutt                            1.9.4-3ubuntu0.3

Ubuntu 16.04 LTS:
  mutt                            1.5.24-1ubuntu0.4

Ubuntu 12.04 ESM:
  mutt                            1.5.21-5ubuntu2.5

After a standard system update you need to restart mutt to make
all the necessary changes.

  CVE-2020-14954, https://launchpad.net/bugs/1884588

Package Information:
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