USN-5574-1: Exim vulnerability

Releases

• Ubuntu 20.04 LTS
• 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 attacker could possibly use this issue to cause a crash or
execute arbitrary code.

Update instructions

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

Ubuntu 20.04

• exim4-base - 4.93-13ubuntu1.6
• exim4-daemon-heavy - 4.93-13ubuntu1.6
• exim4-daemon-light - 4.93-13ubuntu1.6

Ubuntu 18.04

• exim4-base - 4.90.1-1ubuntu1.9
• exim4-daemon-heavy - 4.90.1-1ubuntu1.9
• exim4-daemon-light - 4.90.1-1ubuntu1.9

Ubuntu 16.04

• exim4-base - 4.86.2-2ubuntu2.6+esm2
  Available with Ubuntu Pro
• exim4-daemon-heavy - 4.86.2-2ubuntu2.6+esm2
  Available with Ubuntu Pro
• exim4-daemon-light - 4.86.2-2ubuntu2.6+esm2
  Available with Ubuntu Pro

Ubuntu 14.04

• exim4-base - 4.82-3ubuntu2.4+esm4
  Available with Ubuntu Pro
• exim4-daemon-heavy - 4.82-3ubuntu2.4+esm4
  Available with Ubuntu Pro
• exim4-daemon-light - 4.82-3ubuntu2.4+esm4
  Available with Ubuntu Pro

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

References

• CVE-2022-37452