==========================================================================
Ubuntu Security Notice USN-4645-1
November 25, 2020

mutt vulnerability
==========================================================================

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

– Ubuntu 20.10
– Ubuntu 20.04 LTS
– Ubuntu 18.04 LTS
– Ubuntu 16.04 LTS
– Ubuntu 12.04 ESM

Summary:

Mutt could be made to expose sensitive information.

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

Details:

It was discovered that Mutt incorrectly handled certain connections.
An attacker could possibly use this issue to expose sensitive information.

Update instructions:

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

Ubuntu 20.10:
mutt 1.14.6-1ubuntu0.1

Ubuntu 20.04 LTS:
mutt 1.13.2-1ubuntu0.3

Ubuntu 18.04 LTS:
mutt 1.9.4-3ubuntu0.4

Ubuntu 16.04 LTS:
mutt 1.5.24-1ubuntu0.5

Ubuntu 12.04 ESM:
mutt 1.5.21-5ubuntu2.6

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

References:
https://usn.ubuntu.com/4645-1
CVE-2020-28896

Package Information:
https://launchpad.net/ubuntu/+source/mutt/1.14.6-1ubuntu0.1
https://launchpad.net/ubuntu/+source/mutt/1.13.2-1ubuntu0.3
https://launchpad.net/ubuntu/+source/mutt/1.9.4-3ubuntu0.4
https://launchpad.net/ubuntu/+source/mutt/1.5.24-1ubuntu0.5
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