Debian Security Advisory

DLA-2574-1 openldap -- LTS security update

Date Reported:
21 Feb 2021
Affected Packages:
Security database references:
In Mitre's CVE dictionary: CVE-2021-27212.
More information:

A vulnerability in the Certificate List Exact Assertion validation was discovered in OpenLDAP, a free implementation of the Lightweight Directory Access Protocol. An unauthenticated remote attacker can take advantage of this flaw to cause a denial of service (slapd daemon crash) via specially crafted packets.

For Debian 9 stretch, this problem has been fixed in version 2.4.44+dfsg-5+deb9u8.

We recommend that you upgrade your openldap packages.

For the detailed security status of openldap please refer to its security tracker page at:

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