Title

The Infoblox system must send a notification in the event of an error when validating the binding of another DNS server’s identity to the DNS information. (Cat II impact)

Discussion

Failing to act on 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.

Check Content

Infoblox systems allow configuration of DNS auditing based on selectable events. Verify that important event categories are enabled to log events. 1. Navigate to Data Management >> DNS and select "Grid DNS Properties". 2. Toggle Advanced Mode and review the "Logging" tab. 3. Validate that at a minimum the following categories are enabled: client config database dnssec lame servers network notify rate-limit resolver security transfer-in transfer-out update update-security 4. When complete, click "Cancel" to exit the "Properties" screen. If the named logging categories are not enabled, this is a finding.

Fix Text

1. Navigate to Data Management >> DNS. Select "Grid DNS Properties". 2. Toggle Advanced Mode and review the "Logging" tab. 3. Enable the following categories using the check boxes: client config database dnssec lame servers network notify rate-limit resolver security transfer-in transfer-out update update-security 4. When complete, click "Save & Close" to save the changes and exit the "Properties" screen. 5. Perform a service restart if necessary.

Additional Identifiers

Rule ID: SV-233892r621666_rule

Vulnerability ID: V-233892

Group Title: SRG-APP-000350-DNS-000044

Expert Comments

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