Ubuntu 20.10: USN-4634-1 Critical: OpenLDAP Denial Of Service

ubuntu

November 17, 2020

OpenLDAP could be made to crash if it received specially crafted network traffic.

Summary

OpenLDAP could be made to crash if it received specially crafted network

traffic.

Software Description:

- openldap: Lightweight Directory Access Protocol

Details:

It was discovered that OpenLDAP incorrectly handled certain malformed

inputs. A remote attacker could possibly use this issue to cause OpenLDAP

to crash, resulting in a denial of service.

Topics Covered

security advisory denial of service software update Ubuntu openldap attack

Update Instructions

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

Ubuntu 20.10:
  slapd                           2.4.53+dfsg-1ubuntu1.2

Ubuntu 20.04 LTS:
  slapd                           2.4.49+dfsg-2ubuntu1.5

Ubuntu 18.04 LTS:
  slapd                           2.4.45+dfsg-1ubuntu1.8

Ubuntu 16.04 LTS:
  slapd                           2.4.42+dfsg-2ubuntu3.11

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