The Infoblox system must authenticate the other DNS server before responding to a server-to-server transaction.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-214186	IDNS-7X-000460	SV-214186r612370_rule		Medium

Description
Without authenticating devices, unidentified or unknown devices may be introduced, thereby facilitating malicious activity. Device authentication is a solution enabling an organization to manage devices. It is an additional layer of authentication ensuring only specific pre-authorized devices can access the system. This requirement applies to server-to-server (zone transfer) transactions only and is provided by TSIG/SIG(0), which enforces mutual server authentication using a key that is unique to each server pair (TSIG) or using PKI-based authentication (SIG(0)).

Description

Without authenticating devices, unidentified or unknown devices may be introduced, thereby facilitating malicious activity. Device authentication is a solution enabling an organization to manage devices. It is an additional layer of authentication ensuring only specific pre-authorized devices can access the system. This requirement applies to server-to-server (zone transfer) transactions only and is provided by TSIG/SIG(0), which enforces mutual server authentication using a key that is unique to each server pair (TSIG) or using PKI-based authentication (SIG(0)).

STIG	Date
Infoblox 7.x DNS Security Technical Implementation Guide	2020-12-10

Details

Check Text ( C-15401r295821_chk )
Navigate to Data Management >> DNS >> Zones tab. Review each zone by clicking "Edit" and inspecting the "Name Servers" tab. If the all entries in the "Type" column are configured as "Grid", this check is not applicable. Verify that each zone which contains non-Grid name servers is further verified by inspection of the "Zone Transfers" tab and configuration of TSIG Access Control Entry (ACE). If there is a non-Grid system which utilizes zone transfers but does not have a TSIG key, this is a finding. When complete, click "Cancel" to exit the "Properties" screen.

Check Text ( C-15401r295821_chk )

Navigate to Data Management >> DNS >> Zones tab.

Review each zone by clicking "Edit" and inspecting the "Name Servers" tab.

If the all entries in the "Type" column are configured as "Grid", this check is not applicable.

Verify that each zone which contains non-Grid name servers is further verified by inspection of the "Zone Transfers" tab and configuration of TSIG Access Control Entry (ACE).

If there is a non-Grid system which utilizes zone transfers but does not have a TSIG key, this is a finding.

When complete, click "Cancel" to exit the "Properties" screen.

Fix Text (F-15399r295822_fix)
Navigate to Data Management >> DNS >> Zones tab. Select a zone and click "Edit". Click on "Zone Transfers" tab, and click "Override" for the "Allow Zone Transfers to" section. Use the radio button to select "Set of ACEs" and the "Add" dropdown to configure a TSIG key. It is important to verify that both the Infoblox and other DNS server have the identical TSIG configuration. When complete, click "Save & Close" to save the changes and exit the "Properties" screen. Perform a service restart if necessary. Verify zone transfers are operational after configuration of TSIG.

Fix Text (F-15399r295822_fix)

Navigate to Data Management >> DNS >> Zones tab.

Select a zone and click "Edit".
Click on "Zone Transfers" tab, and click "Override" for the "Allow Zone Transfers to" section.
Use the radio button to select "Set of ACEs" and the "Add" dropdown to configure a TSIG key. It is important to verify that both the Infoblox and other DNS server have the identical TSIG configuration.
When complete, click "Save & Close" to save the changes and exit the "Properties" screen.

Perform a service restart if necessary.

Verify zone transfers are operational after configuration of TSIG.