An openldap security update has been released for Debian GNU/Linux 8 LTS to address vulnerability that result in denial of service.

DLA 2199-1: openldap security update

Package : openldap
Version : 2.4.40+dfsg-1+deb8u6
CVE ID : CVE-2020-12243

A vulnerability was discovered in OpenLDAP, a free implementation of the
Lightweight Directory Access Protocol. LDAP search filters with nested
boolean expressions can result in denial of service (slapd daemon
crash).

For Debian 8 "Jessie", this problem has been fixed in version
2.4.40+dfsg-1+deb8u6.

We recommend that you upgrade your openldap packages.

Further information about Debian LTS security advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://wiki.debian.org/LTS