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Ubuntu Security Notice USN-4124-2
September 16, 2019

exim4 vulnerability
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A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 14.04 ESM

Summary:

Exim could be made to run programs as an administrator if it received
specially crafted network traffic.

Software Description:
- exim4: Exim is a mail transport agent

Details:

USN-4124-1 fixed a vulnerability in Exim. This update provides
the corresponding update for Ubuntu 14.04 ESM.

Original advisory details:

 It was discovered that Exim incorrectly handled certain decoding
 operations. A remote attacker could possibly use this issue to execute
 arbitrary commands.

Update instructions:

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

Ubuntu 14.04 ESM:
  exim4-daemon-heavy              4.82-3ubuntu2.4+esm1
  exim4-daemon-light              4.82-3ubuntu2.4+esm1

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

References:
  https://usn.ubuntu.com/4124-2
  https://usn.ubuntu.com/4124-1
  CVE-2019-15846