V-285272

Discussion

Failing to act on the validation errors may result in the use of invalid, corrupted, or compromised information. The validation of bindings can be achieved, for example, by the use of cryptographic checksums. Validations must be performed automatically. At a minimum, the application must log the validation error. However, more stringent actions can be taken based on the security posture and value of the information. The organization should consider the system's environment and impact of the errors when defining the actions. Additional examples of actions include automated notification to administrators, halting system process, or halting the specific operation. The DNS server should audit all failed attempts at server authentication through DNSSEC and TSIG/SIG(0). The actual auditing is performed by the OS/NDM but the configuration to trigger the auditing is controlled by the DNS server. Satisfies: SRG-APP-000474-DNS-000044, SRG-APP-000474-DNS-000073, SRG-APP-000504-DNS-000074, SRG-APP-000504-DNS-000082

Check Content

Verify Infoblox external logging is configured to log DNS server binding validation errors and send notification to the DNS administrator.

1. Navigate to Infoblox Grid >> Grid Manager and select "Grid Properties" (Toolbar menu).
2. Review the "Notification" tab and validate the selection of Event Types for SNMP and Email notifications.
3. Review the "SNMP" and "Email" tabs to verify their respective configurations, as applicable.
4. When complete, click "Cancel" to exit the "Properties" screen.  

Note: DNS logging is enabled by default. Categories can be checked from Data Management >> DNS tab and select "Grid DNS Properties" (Toolbar menu) >> Toggle Advanced Mode >> Logging tab.

If the named logging categories are not enabled, this is a finding.