USN-3307-1: OpenLDAP vulnerability

1 June 2017

openldap vulnerability

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

  • Ubuntu 17.04
  • Ubuntu 16.10
  • Ubuntu 16.04 LTS
  • Ubuntu 14.04 LTS


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

Software Description

  • openldap - OpenLDAP utilities


Karsten Heymann discovered that OpenLDAP incorrectly handled certain search requests. A remote attacker could use this issue to cause slapd to crash, resulting in a denial of service.

Update instructions

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

Ubuntu 17.04
slapd - 2.4.44+dfsg-3ubuntu2.1
Ubuntu 16.10
slapd - 2.4.42+dfsg-2ubuntu4.1
Ubuntu 16.04 LTS
slapd - 2.4.42+dfsg-2ubuntu3.2
Ubuntu 14.04 LTS
slapd - 2.4.31-1+nmu2ubuntu8.4

To update your system, please follow these instructions:

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