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 quot;linkdnquot; and quot;containerdnquot; 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.MIT krb5 1.6 or later allows an authenticated kadmin with permission to add principals to an LDAP Kerberos database to cause a denial of service or bypass a DN container check by supplying tagged data that is internal to the database module.