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Ubuntu Security Notice USN-4934-1

Ubuntu Security Notice USN-4934-1
Posted May 4, 2021
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4934-1 - 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.

tags | advisory, denial of service, arbitrary, local
systems | linux, ubuntu
advisories | CVE-2020-28007, CVE-2020-28011, CVE-2020-28015, CVE-2020-28019, CVE-2020-28023, CVE-2021-27216
SHA-256 | 8b9f1909e4ebf0423b58a94fe51018e3a1d36c06cc7fa8c878d3f560bcdc58cf

Ubuntu Security Notice USN-4934-1

Change Mirror Download
==========================================================================
Ubuntu Security Notice USN-4934-1
May 04, 2021

exim4 vulnerabilities
==========================================================================

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

- Ubuntu 21.04
- Ubuntu 20.10
- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS

Summary:

Several security issues were fixed in Exim.

Software Description:
- 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 LTS:
exim4-base 4.93-13ubuntu1.5
exim4-daemon-heavy 4.93-13ubuntu1.5
exim4-daemon-light 4.93-13ubuntu1.5

Ubuntu 18.04 LTS:
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:
https://ubuntu.com/security/notices/USN-4934-1
CVE-2020-28007, CVE-2020-28008, CVE-2020-28009, CVE-2020-28010,
CVE-2020-28011, CVE-2020-28012, CVE-2020-28013, CVE-2020-28014,
CVE-2020-28015, CVE-2020-28016, CVE-2020-28017, CVE-2020-28018,
CVE-2020-28019, CVE-2020-28020, CVE-2020-28021, CVE-2020-28022,
CVE-2020-28023, CVE-2020-28024, CVE-2020-28025, CVE-2020-28026,
CVE-2021-27216

Package Information:
https://launchpad.net/ubuntu/+source/exim4/4.94-15ubuntu1.2
https://launchpad.net/ubuntu/+source/exim4/4.94-7ubuntu1.2
https://launchpad.net/ubuntu/+source/exim4/4.93-13ubuntu1.5
https://launchpad.net/ubuntu/+source/exim4/4.90.1-1ubuntu1.8
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