USN-4934-2: Exim vulnerabilities

Releases

• Ubuntu 16.04 ESM
• Ubuntu 14.04 ESM

Packages

• exim4 - Exim is a mail transport agent

Details

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.

Update instructions

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

Ubuntu 16.04

• exim4-base - 4.86.2-2ubuntu2.6+esm1
  Available with Ubuntu Pro
• exim4-daemon-heavy - 4.86.2-2ubuntu2.6+esm1
  Available with Ubuntu Pro
• exim4-daemon-light - 4.86.2-2ubuntu2.6+esm1
  Available with Ubuntu Pro

Ubuntu 14.04

• exim4-base - 4.82-3ubuntu2.4+esm3
  Available with Ubuntu Pro
• exim4-daemon-heavy - 4.82-3ubuntu2.4+esm3
  Available with Ubuntu Pro
• exim4-daemon-light - 4.82-3ubuntu2.4+esm3
  Available with Ubuntu Pro

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

References

• CVE-2020-28011
• CVE-2020-28009
• CVE-2021-27216
• CVE-2020-28022
• CVE-2020-28025
• CVE-2020-28026
• CVE-2020-28024
• CVE-2020-28014
• CVE-2020-28007
• CVE-2020-28016
• CVE-2020-28020
• CVE-2020-28013
• CVE-2020-28008
• CVE-2020-28015
• CVE-2020-28017
• CVE-2020-28012

Related notices

• USN-4934-1: exim4-config, exim4-base, eximon4, exim4-daemon-heavy, exim4-dev, exim4, exim4-daemon-light