A vulnerability was discovered in 389-ds-base through versions 1.3.7.10, 1.3.8.8 and 1.4.0.16. The lock controlling the error log was not correctly used when re-opening the log file in log__error_emergency(). An attacker could send a flood of modifications to a very large DN, which would cause slapd to crash.
https://pagure.io/389-ds-base/issue/49937
https://lists.debian.org/debian-lts-announce/2018/09/msg00037.html
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-14624
https://access.redhat.com/errata/RHSA-2018:2757
http://lists.opensuse.org/opensuse-security-announce/2019-05/msg00033.html