Configuring lookup rules

By configuring lookup rules, you can map security exposure data to the correct configuration items (CIs) in the CMDB. This mapping is a critical function because associating exposure findings with the right assets is essential for proper risk assessment, assignment, and remediation workflows.

Parent Topic:Configure rules to manage findings

Related topics

Associating finding with a configuration item using lookup rules

Create lookup rule

Create lookup rules to automatically and accurately associate incoming exposure findings data with the correct configuration items (CIs) in the Configuration Management Database (CMDB) This is essential for enabling the rest of the vulnerability management process to function correctly.

Before you begin

Role required: sn_vul.vulnerability_admin

About this task

Creating lookup rules requires advanced ServiceNow and Unified Security Exposure Management (USEM) expertise. Rather than modifying one of the existing lookup rules, consider copying it and modifying the copy. When you are satisfied that the new rule does what you want, deactivate the original.

Note: Rules, once removed, cannot be recovered. Rather than removing existing rules, deactivate them when creating new ones.

Procedure

1. Navigate to Workspaces > Security Exposure Management Workspace.

2. Select Administration [gear icon] in the navigation pane.

3. Select Review on the Look-up rules tile.

4. On the Rules page, select Look-up in the navigation pane.

5. Select New.

6. On the form, fill in the fields.

1. Select Save.

   For more implementation information for lookup rules see, Steps to help prevent duplicate or orphaned records after running Vulnerability Response CI lookup rules.

Related topics

Vulnerability Response vulnerable item form fields

Ignore CI classes

To ignore some configuration item (CI) classes, for example Load Balancer [cmdb_ci_lb], when running lookup rules, set the ignoreCIClass [sn_sec_cmn.ignoreCIClass] system property.

Before you begin

Role required: admin

Note:

The ignoreCIClass system property is available starting with Vulnerability Response v9.0. However, the property functionality is not available upon upgrade from any previous version.

If you have upgraded from any Security Operations application, prior to version 9.0, see KB0788209 for instructions on how to enable this functionality.

Procedure

1. Enter sys_properties.list in the left navigation bar.

2. Select Enter.

3. In the Search menu, under Name enter sn_sec_cmn.ignoreCIClass.

4. In the Value text box, enter the CI classes to exclude in a comma-separated list.

5. Select Update.

   This list is used by CI Lookup Rules during the next import. Vulnerable items created during import are not associated to a CI of any type listed in the Value field of the sn_sec_cmn.ignoreCIClass system property.

Reapply lookup rules

Reapply lookup rules to ensure updated or existing rules are applied to relevant items. This helps maintain accurate data mapping and consistency after rule changes or additions.

Before you begin

Role required: sn_vul.vulnerability_admin, sn_vul_cmn.usem_admin, sn_vul.app_sec_manager, sn_vul_container.admin, sn_vulc.admin

About this task

Reapplying lookup rules is useful when:

• Look-up rules are updated or newly created.
• Findings were previously unassigned or incorrectly assigned.
• You must reassign ownership based on updated business logic or CI ownership changes.

Note:

For Vulnerability Response (VR) lookup rules, two background jobs are simultaneously initiated after you select Reapply: one for Vulnerability Response (VR) rules and one for Application Vulnerability Response (AVR) rules.

To keep these jobs distinct and to prevent conflicts, the AVR and VR lookup rules have the Applies to field on lookup rule records, which by default is not populated.

If you're creating lookup rules for third-party and ServiceNow® integrations that support both Application Vulnerability Response (AVR) and Vulnerability Response (VR) like the Vulnerability Response Integration with Wiz, for example, you might want to create two separate rules, one for VR and one for AVR and choose one in the Applies to field:

• Discovered Item - for Vulnerability Response lookup rules.
• Discovered Application - for Application Vulnerability Response lookup rules.

With this distinction set, after the respective background jobs for AVR and VR are completed, the system resets the flag only for the lookup rules for the background job that was run.

Procedure

1. Navigate to Workspaces > Security Exposure Management Workspace.

2. Select Administration [gear icon] in the navigation pane.

3. Select Review on the Look-up rules tile.

4. On the Rules page, select Look-up rules in the navigation pane.

5. Select Reapply.

   All the rules are reapplied regardless of any filters.

6. Alternatively, you can navigate to the Lookup Rules [sn_sec_cmn_ci_lookup_rule] table, select individual rules, edit the records, and update them.

7. Select Apply Changes to apply your recent changes to existing discovered items.

   Note: Depending on your number of discovered items, evaluating them with your updated rules might take some time.

Related topics

Reapply lookup rules on selected discovered items

Reapply lookup rules on selected discovered items

Reapply the lookup rules on selected discovered items from the discovered item list view select actions. If the configuration item (CI) changes after you reapply the rules, the discovered items are updated with the new CI and impacted detections. Vulnerable items are also updated.

Before you begin

Roles required: admin

About this task

For more information, see CI changes for discovered items.

For more information on the concepts of CI matching and the CMDB, discovered item lookup, rule-based identification, see the CI matching in Vulnerability Response [KB0998706] article in the HI Knowledge Base.

Procedure

1. Navigate to All > Security operations > CMDB > Discovered Items.

2. Select the required discovered items and select Actions on selected rows....

3. From the list, select Reapply CI lookup rules.

   Note: You can skip the reapplication of lookup rules on discovered items with the substate ‘CI Decommissioned’ by enabling the system property sn_sec_cmn.skipItemsWithCIDecommissioned.

   The rules are reapplied on these discovered items.

4. Select View status in the message.

   The status displays on the background job form.

   Note: In the Notes field, the Discovered items could not be process due to exception attribute with a non-zero value indicates that there’s an error or exception while reapplying a look-up rule. Check the system logs for more details.

5. Reapply only applies to items scanned within the last 90 days based on the last_scan_date, last_comp_scan_date, non_infra_last_scan_date, non_infra_last_comp_scan_date column.

   Added ci_lifecycle_status_source (scope = sn_sec_cmn) system property for configuring CI lifecycle status columns (for example, Install Status, Operational Status). You can configure additional columns for retiring CIs.

   Columns are added to the background job list view:

   • Elapsed Time(ms): The time required for processing the background job.
   • Items Processed: The number of items processed until now.
   • Total Items to be Processed: The total number of items remaining to be processed.
   • Time Until Completion(ms): The time remaining until the background job is processed. These columns provide visibility into job progress. These columns are available for each form view for you to add according to requirement.