Attackers use readily available LDAP commands to exploit this issue. source: https://www.securityfocus.com/bid/27778/info OpenLDAP is prone to a remote denial-of-service vulnerability. Attackers can exploit this issue to deny service to legitimate users. OpenLDAP 2.3.39 is vulnerable to this issue; other versions may also be affected. This issue is related to one described in BID 26245 (OpenLDAP Multiple Remote Denial of Service Vulnerabilities), identified by CVE-2007-6698. ldapmodrdn -x -h :389 -D -w -e \noop ou=test,dc=my-domain,dc=com ou=test2