A vulnerability was discovered in the 389 Directory Server that allows an unauthenticated attacker with network access to the LDAP port to cause a denial of service. The denial of service is triggered by a single message sent over a TCP connection, no bind or other authentication is required. The message triggers a segmentation fault that results in slapd crashing.
https://access.redhat.com/security/cve/CVE-2022-0918
https://bugzilla.redhat.com/show_bug.cgi?id=2055815
https://github.com/389ds/389-ds-base/issues/5242
https://lists.debian.org/debian-lts-announce/2023/04/msg00026.html