USN-4366-1: Exim vulnerability

Releases

• Ubuntu 20.04 LTS
• Ubuntu 19.10
• Ubuntu 18.04 ESM
• Ubuntu 16.04 ESM
• Ubuntu 14.04 ESM

Packages

• exim4 - Exim is a mail transport agent

Details

It was discovered that Exim incorrectly handled certain inputs.
An remote attacker could possibly use this issue to access sensitive
information or authentication bypass.

Update instructions

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

Ubuntu 20.04

• exim4-base - 4.93-13ubuntu1.1
• exim4-daemon-heavy - 4.93-13ubuntu1.1
• exim4-daemon-light - 4.93-13ubuntu1.1

Ubuntu 19.10

• exim4-base - 4.92.1-1ubuntu3.1
• exim4-daemon-heavy - 4.92.1-1ubuntu3.1
• exim4-daemon-light - 4.92.1-1ubuntu3.1

Ubuntu 18.04

• exim4-base - 4.90.1-1ubuntu1.5
• exim4-daemon-heavy - 4.90.1-1ubuntu1.5
• exim4-daemon-light - 4.90.1-1ubuntu1.5

Ubuntu 16.04

• exim4-base - 4.86.2-2ubuntu2.6
• exim4-daemon-heavy - 4.86.2-2ubuntu2.6
• exim4-daemon-light - 4.86.2-2ubuntu2.6

Ubuntu 14.04

• exim4-base - 4.82-3ubuntu2.4+esm2
  Available with Ubuntu Pro
• exim4-daemon-heavy - 4.82-3ubuntu2.4+esm2
  Available with Ubuntu Pro
• exim4-daemon-light - 4.82-3ubuntu2.4+esm2
  Available with Ubuntu Pro

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

References

• CVE-2020-12783