Ubuntu 20.10 USN-4744-1 Moderate Security Alert: OpenLDAP DoS Vulnerability

ubuntu

February 22, 2021

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:

Pasi Saarinen discovered that OpenLDAP incorrectly handled certain short

timestamps. 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 openldap doS network traffic ubuntu network issue

Update Instructions

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

Ubuntu 20.10:
  slapd                           2.4.53+dfsg-1ubuntu1.4

Ubuntu 20.04 LTS:
  slapd                           2.4.49+dfsg-2ubuntu1.7

Ubuntu 18.04 LTS:
  slapd                           2.4.45+dfsg-1ubuntu1.10

Ubuntu 16.04 LTS:
  slapd                           2.4.42+dfsg-2ubuntu3.13

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