389 Directory Server is vulnerable to an information disclosure. It is possible because a user with no access to objects in certain LDAP sub-tree is not restricted to not to send LDAP ADD operations with a specific object name, resulting in differnt error message returned to the user based on whether the target object existed or not.
rhn.redhat.com/errata/RHSA-2016-2594.html
rhn.redhat.com/errata/RHSA-2016-2765.html
access.redhat.com/errata/RHSA-2016:2594
access.redhat.com/errata/RHSA-2016:2765
access.redhat.com/security/cve/CVE-2016-4992
access.redhat.com/security/updates/classification/#moderate
bugzilla.redhat.com/show_bug.cgi?id=1347760
bugzilla.redhat.com/show_bug.cgi?id=1354331
bugzilla.redhat.com/show_bug.cgi?id=1376676
bugzilla.redhat.com/show_bug.cgi?id=1381153
rhn.redhat.com/errata/RHSA-2016-2765.html