USN-4934-1: Exim vulnerabilities

Releases

• Ubuntu 21.04
• Ubuntu 20.10
• Ubuntu 20.04 LTS
• Ubuntu 18.04 ESM

Packages

• exim4 - Exim is a mail transport agent

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 21.04

• exim4-base - 4.94-15ubuntu1.2
• exim4-daemon-heavy - 4.94-15ubuntu1.2
• exim4-daemon-light - 4.94-15ubuntu1.2

Ubuntu 20.10

• exim4-base - 4.94-7ubuntu1.2
• exim4-daemon-heavy - 4.94-7ubuntu1.2
• exim4-daemon-light - 4.94-7ubuntu1.2

Ubuntu 20.04

• exim4-base - 4.93-13ubuntu1.5
• exim4-daemon-heavy - 4.93-13ubuntu1.5
• exim4-daemon-light - 4.93-13ubuntu1.5

Ubuntu 18.04

• exim4-base - 4.90.1-1ubuntu1.8
• exim4-daemon-heavy - 4.90.1-1ubuntu1.8
• exim4-daemon-light - 4.90.1-1ubuntu1.8

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

References

• CVE-2020-28022
• CVE-2020-28026
• CVE-2020-28009
• CVE-2020-28012
• CVE-2020-28018
• CVE-2020-28014
• CVE-2020-28015
• CVE-2020-28024
• CVE-2020-28017
• CVE-2020-28025
• CVE-2020-28011
• CVE-2020-28008
• CVE-2020-28013
• CVE-2020-28007
• CVE-2020-28010
• CVE-2020-28019
• CVE-2020-28016
• CVE-2020-28023
• CVE-2020-28020
• CVE-2020-28021
• CVE-2021-27216

Related notices

• USN-4934-2: exim4-base, exim4-dev, exim4, eximon4, exim4-daemon-heavy, exim4-daemon-light, exim4-config