Title

The BIND 9.x server implementation must not be configured with a channel to send audit records to null. (Cat III impact)

Discussion

DNS software administrators require DNS transaction logs for a wide variety of reasons including troubleshooting, intrusion detection, and forensics. Ensuring that the DNS transaction logs are recorded on the local system will provide the capability needed to support these actions. Sending DNS transaction data to the null channel would cause a loss of important data.

Check Content

Verify that the BIND 9.x server is not configured to send audit logs to the null channel. Inspect the "named.conf" file for the following: category null { null; } If there is a category defined to send audit logs to the "null" channel, this is a finding.

Fix Text

Edit the "named.conf" file. Remove any instance of the following: category null { null; }; Restart the BIND 9.x process.

Additional Identifiers

Rule ID: SV-207540r879582_rule

Vulnerability ID: V-207540

Group Title: SRG-APP-000125-DNS-000012

Expert Comments

CCIs tied to check.

Controls tied to check. These are derived from the CCIs shown above.