USN-4934-1 fixed several vulnerabilities in Exim. This update provides
the corresponding update for Ubuntu 14.04 ESM and Ubuntu 16.04 ESM.
CVE-2020-28026 only affected Ubuntu 16.04 ESM.
Original advisory details:
It was discovered that Exim contained multiple security issues. An attacker
could use these issues to cause a denial of service, execute arbitrary
code remotely, obtain sensitive information, or escalate local privileges.
ubuntu.com/security/CVE-2020-28007
ubuntu.com/security/CVE-2020-28008
ubuntu.com/security/CVE-2020-28009
ubuntu.com/security/CVE-2020-28011
ubuntu.com/security/CVE-2020-28012
ubuntu.com/security/CVE-2020-28013
ubuntu.com/security/CVE-2020-28014
ubuntu.com/security/CVE-2020-28015
ubuntu.com/security/CVE-2020-28016
ubuntu.com/security/CVE-2020-28017
ubuntu.com/security/CVE-2020-28020
ubuntu.com/security/CVE-2020-28022
ubuntu.com/security/CVE-2020-28024
ubuntu.com/security/CVE-2020-28025
ubuntu.com/security/CVE-2020-28026
ubuntu.com/security/CVE-2021-27216
ubuntu.com/security/notices/USN-4934-2