Amazon Linux AMI Security Advisory: ALAS-2015-538
Advisory Release Date: 2015-06-02 22:37 Pacific
A flaw was found in the authorization of modrdn operations. An unauthenticated attacker able to issue an ldapmodrdn call to the directory server could use this flaw to perform unauthorized modifications of entries in the directory server.
Run yum update 389-ds-base to update your system.