MIT krb5 1.6 or later allows an authenticated kadmin with permission to add principals to an LDAP Kerberos database to circumvent a DN containership check by supplying both a linkdn and containerdn database argument, or by supplying a DN string which is a left extension of a container DN string but is not hierarchically within the container DN. https://nvd.nist.gov/vuln/detail/CVE-2018-5730
