The DBMS must protect against or limit the effects of organization-defined types of Denial of Service (DoS) attacks.
A variety of technologies exist to limit, or in some cases, eliminate the effects of DoS attacks. For example, boundary protection devices can filter certain types of packets to protect devices on an organization's internal network from being directly affected by DoS attacks.
Employing increased capacity and bandwidth combined with service redundancy may reduce the susceptibility to some DoS attacks.
Some of the ways databases can limit their exposure to DoS attacks are through limiting the number of connections that can be opened by a single user and database clustering.
Review DBMS settings to verify the DBMS implements measures to limit the effects of the organization-defined types of Denial of Service (DoS) attacks.
If measures have not been implemented, this is a finding.
Check the $ORACLE_HOME/network/admin/listener.ora to see if a Rate Limit has been established. A rate limit is used to prevent denial of service (DOS) attacks on a database or to control a logon storm such as may be caused by an application server reboot.
- - - - - Example of a listener configuration with rate limiting in effect: