389-ds-base before versions 1.3.5.17 and 1.3.6.10 is vulnerable to an invalid pointer dereference in the way LDAP bind requests are handled. A remote unauthenticated attacker could use this flaw to make ns-slapd crash via a specially crafted LDAP bind request, resulting in denial of service.
https://pagure.io/389-ds-base/issue/49220
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2017-2668
https://access.redhat.com/errata/RHSA-2017:0920