Tenable Source

The Tenable Source provides a secure endpoint to ingest audit-log events, vulnerability, and asset data from the Tenable.io APIs. It securely stores the required authentication, scheduling, and state tracking information.

• The Vulnerability Export API first exports vulnerabilities that are used to initiate export jobs. Next, it gets the export status and then downloads exported vulnerabilities in a chunk.

• The Audit Log API is used to collect audit logs. It does not provide a pagination function. Logs are polled every 24 hours with a limit of 5,000.

• The Asset Export API first exports assets that are used to initiate export jobs. Next, it gets the export status and then downloads exported assets in a chunk.

note

This Source is not available in the Fed deployment.

States

A Tenable Source tracks errors, reports its health, and start-up progress. You’re informed, in real-time, if the Source is having trouble connecting, if there's an error requiring user action, or if it is healthy and collecting by utilizing Health Events.

A Tenable Source goes through the following states when created:

1. Pending: Once the Source is submitted it is validated, stored, and placed in a Pending state.
2. Started: A collection task is created on the Hosted Collector.
3. Initialized: The task configuration is complete in Sumo Logic.
4. Authenticated: The Source successfully authenticated with Tenable.
5. Collecting: The Source is actively collecting data from Tenable.

If the Source has any issues during any one of these states it is placed in an Error state.

When you delete the Source it is placed in a Stopping state, when it has successfully stopped it is deleted from your Hosted Collector.

On the Collection page, the Health and Status for Sources is displayed. Use Health Events to investigate issues with collection.

Hover your mouse over the status icon to view a tooltip with details on the detected issue.

Prerequisite

The Tenable Source is configured with a Tenable IO Access and Secret Key. Your account must have ADMINISTRATOR [64] user permissions.

Create a Tenable Source

When you create a Tenable Source, you add it to a Hosted Collector. Before creating the Source, identify the Hosted Collector you want to use or create a new Hosted Collector. For instructions, see Configure a Hosted Collector.

To configure A Tenable Source:

1. In Sumo Logic, navigate to Manage Data > Collection and open the Collection tab.

2. On the Collectors page, click Add Source next to a Hosted Collector.

3. Select Tenable.

   

4. Enter a Name for the Source. The description is optional.

   

5. (Optional) For Source Category, enter any string to tag the output collected from the Source. Category metadata is stored in a searchable field called _sourceCategory.

6. Forward to SIEM. Check the checkbox to forward your data to Cloud SIEM Enterprise. When configured with the Forward to SIEM option the following metadata fields are set:

   • _siemVendor: Tenable

   • _siemProduct: Cloud API

   • _siemFormat: JSON

   • _siemEventID: Set to the type of data ingested.

     • Vulnerabilities: vulnerability
     • Audits: {action}
     • Assets (Inventory): assets

   • _siemDataType (Only with Assets (Inventory) data): Inventory

7. (Optional) Fields. Click the +Add Field link to define the fields you want to associate, each field needs a name (key) and value.

   •  A green circle with a check mark is shown when the field exists in the Fields table schema.
   •  An orange triangle with an exclamation point is shown when the field doesn't exist in the Fields table schema. In this case, an option to automatically add the nonexistent fields to the Fields table schema is provided. If a field is sent to Sumo that does not exist in the Fields schema it is ignored, known as dropped.

8. Provide the Access Key and Secret Key to authenticate requests.

9. (Optional) Include unlicensed objects. Select the checkbox if you want to collect unlicensed objects.

10. Supported APIs to collect. Select one or more of the available APIs: Vulnerability Data, Audit Logs, and Asset Data.

11. Processing Rules. Configure any desired filters, such as allowlist, denylist, hash, or mask, as described in Create a Processing Rule.

12. When you are finished configuring the Source click Submit.

Error types

When Sumo Logic detects an issue it is tracked by Health Events. The following table shows the three possible error types, the reason the error would occur, if the Source attempts to retry, and the name of the event log in the Health Event Index.

Type	Reason	Retries	Retry Behavior	Health Event Name
ThirdPartyConfig	Normally due to an invalid configuration. You'll need to review your Source configuration and make an update.	Yes	The Source will retry for up to 90 minutes, after which retries will be attempted every 60 minutes.	ThirdPartyConfigError
ThirdPartyGeneric	Normally due to an error communicating with the third party service APIs.	Yes	The Source will retry for up to 90 minutes, after which retries will be attempted every 60 minutes.	ThirdPartyGenericError
FirstPartyGeneric	Normally due to an error communicating with the internal Sumo Logic APIs.	Yes	The Source will retry for up to 90 minutes, after which retries will be attempted every 60 minutes.	FirstPartyGenericError

JSON configuration

Sources can be configured using UTF-8 encoded JSON files with the Collector Management API. See how to use JSON to configure Sources for details. 

Parameter	Type	Required	Description	Access
config	JSON Object	Yes	Contains the configuration parameters for the Source.
schemaRef	JSON Object	Yes	Use {"type":"Tenable"} for a Tenable Source.	not modifiable
sourceType	String	Yes	Use Universal for a Tenable Source.	not modifiable

The following table shows the config parameters for a Tenable Source.

Parameter	Type	Required?	Default	Description	Access
name	String	Yes		Type a desired name of the Source. The name must be unique per Collector. This value is assigned to the metadata field _source.	modifiable
description	String	No	null	Type a description of the Source.	modifiable
category	String	No	null	Type a category of the source. This value is assigned to the metadata field _sourceCategory. See best practices for details.	modifiable
fields	JSON Object	No		JSON map of key-value fields (metadata) to apply to the Collector or Source. Use the boolean field _siemForward to enable forwarding to SIEM.	modifiable
access_key	String	Yes		The Tenable access key you want to use to authenticate collection requests.	modifiable
secret_key	String	Yes		The Tenable secret key you want to use to authenticate collection requests.	modifiable
include_unlicensed_assets	Boolean	No	False	Set to true if you want to collect unlicensed objects.	modifiable
supported_apis	Array of strings	No	Vulnerability Data	Define one or more of the available APIs to collect: Vulnerability Data, Audit Logs, and Asset Data. For example, for both you'd use:["Vulnerability Data","Audit Logs","Asset Data"]	modifiable

See how to create processing rules using JSON.

Tenable Source JSON example:

{
    "api.version": "v1",
    "source": {
        "schemaRef": {
            "type": "Tenable"
        },
        "config": {
            "name": "Tenable",
            "description": "East field",
            "access_key": "********",
            "secret_key": "********",
            "supported_apis": ["Vulnerability Data","Audit Logs","Asset Data"],
            "fields": {
                "_siemForward": false
            },
            "category": "eastTeamF"
        },
        "sourceType": "Universal"
    }
}