A vulnerability in the handling of normalization with modrdn was discovered in OpenLDAP, a free implementation of the Lightweight Directory Access Protocol. An unauthenticated remote attacker can use this flaw to cause a denial of service (slapd daemon crash) via a specially crafted packet.
For Debian 8 jessie, these problems have been fixed in version 2.4.40+dfsg-1+deb8u7.
We recommend that you upgrade your openldap packages.
Further information about Extended LTS security advisories can be found at: https://deb.freexian.com/extended-lts/