A Mutt security update has been released for Ubuntu Linux 16.04 LTS, 18.04 LTS, 20.04 LTS, 22.04 LTS, and 23.04.

[USN-6374-1] Mutt vulnerabilities

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Ubuntu Security Notice USN-6374-1
September 14, 2023

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

- Ubuntu 23.04
- Ubuntu 22.04 LTS
- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS (Available with Ubuntu Pro)
- Ubuntu 16.04 LTS (Available with Ubuntu Pro)

Summary:

Mutt could be made to crash if it received specially crafted
input.

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

Details:

It was discovered that Mutt incorrectly handled certain email header
content. If a user were tricked into opening a specially crafted message,
a remote attacker could possibly use this issue to cause a denial of
service. (CVE-2023-4874, CVE-2023-4875)

Update instructions:

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

Ubuntu 23.04:
  mutt                            2.2.9-1ubuntu0.23.04.1

Ubuntu 22.04 LTS:
  mutt                            2.1.4-1ubuntu1.2

Ubuntu 20.04 LTS:
  mutt                            1.13.2-1ubuntu0.6

Ubuntu 18.04 LTS (Available with Ubuntu Pro):
  mutt                            1.9.4-3ubuntu0.6+esm1

Ubuntu 16.04 LTS (Available with Ubuntu Pro):
  mutt                            1.5.24-1ubuntu0.6+esm3
  mutt-patched                    1.5.24-1ubuntu0.6+esm3

In general, a standard system update will make all the necessary changes.

References:
  https://ubuntu.com/security/notices/USN-6374-1
  CVE-2023-4874, CVE-2023-4875

Package Information:
  https://launchpad.net/ubuntu/+source/mutt/2.2.9-1ubuntu0.23.04.1
  https://launchpad.net/ubuntu/+source/mutt/2.1.4-1ubuntu1.2
  https://launchpad.net/ubuntu/+source/mutt/1.13.2-1ubuntu0.6