It was discovered that OpenLDAP incorrectly handled certain network
packets. A remote attacker could use this issue to cause OpenLDAP to crash,
resulting in a denial of service, or possibly execute arbitrary code.
The problem can be corrected by updating your system to the following
Ubuntu 20.04 LTS:
Ubuntu 18.04 LTS:
Ubuntu 16.04 LTS:
In general, a standard system update will make all the necessary changes.