Systems without vulnerabilities - non critical patched in a month

Description

The percentage of systems that have been active in the last 30 days and that have resolved non critical vulnerabilities published in the last month, providing critical insight into the organisation's ability to minimize exposure to known threats and effectively reduce the attack surface.

How we measure it

Find all active hosts per your vulnerability management system. Join the hosts with the vulnerability database, and filter the vulnerabilities on the criteria as defined in the metric definition.

Meta Data

Attribute	Value
Metric id	vm_posture_non_critical_month
Category	Vulnerability Management
SLO	90.00% - 95.00%
Weight	0.8
Type

References

Framework	Ref	Domain	Control
ISO 27001:2022	A.8.8	8 Technological controls	Management of technical vulnerabilities
CIS 8.1	7.5	Continuous Vulnerability Management	Perform Automated Vulnerability Scans of Internal Enterprise Assets
CIS 8.1	7.6	Continuous Vulnerability Management	Perform Automated Vulnerability Scans of Externally-Exposed Enterprise Assets
NIST CSF v2.0	ID.RA-01	Risk Assessment (ID.RA)	ID.RA-01: Vulnerabilities in assets are identified, validated, and recorded
Essential8-ML2	ISM-1693	Patch applications	Patches, updates or other vendor mitigations for vulnerabilities in applications other than office productivity suites, web browsers and their extensions, email clients, PDF software, and security products are applied within one month of release.
Essential8-ML3	ISM-1693	Patch applications	Patches, updates or other vendor mitigations for vulnerabilities in applications other than office productivity suites, web browsers and their extensions, email clients, PDF software, and security products are applied within one month of release.
Essential8-ML1	ISM-1695	Patch operating systems	Patches, updates or other vendor mitigations for vulnerabilities in operating systems of workstations, non-internet-facing servers and non-internet-facing network devices are applied within one month of release.
Essential8-ML2	ISM-1695	Patch operating systems	Patches, updates or other vendor mitigations for vulnerabilities in operating systems of workstations, non-internet-facing servers and non-internet-facing network devices are applied within one month of release.
Essential8-ML3	ISM-1697	Patch operating systems	Patches, updates or other vendor mitigations for vulnerabilities in drivers are applied within one month of release when vulnerabilities are assessed as non-critical by vendors and no working exploits exist.
Essential8-ML3	ISM-1902	Patch operating systems	Patches, updates or other vendor mitigations for vulnerabilities in operating systems of workstations, non-internet-facing servers and non-internet-facing network devices are applied within one month of release when vulnerabilities are assessed as non-critical by vendors and no working exploits exist.
Essential8-ML3	ISM-1904	Patch operating systems	Patches, updates or other vendor mitigations for vulnerabilities in firmware are applied within one month of release when vulnerabilities are assessed as non-critical by vendors and no working exploits exist.

Code

SELECT
  host.hostname AS resource,
  'host' as resource_type,
  CASE
    WHEN count(cve.aid) = 0 THEN 1
    ELSE 0
  END AS compliance,
  CAST(count(cve.*) as text) AS detail
FROM
  {{ ref('crowdstrike_hosts') }} AS host
LEFT JOIN
  {{ ref('crowdstrike_vulnerabilities') }} AS cve
ON
  host.device_id = cve.aid
  AND cve.status IN ('open', 'reopen')
  AND cve.severity NOT IN ('HIGH', 'CRITICAL')
WHERE
  CURRENT_DATE - CAST(STRPTIME(host.last_seen, '%Y-%m-%dT%H:%M:%SZ') AS DATE) < 30 and
  CURRENT_DATE - CAST(cve.published_date AS DATE) >= 30
GROUP BY
  host.hostname

SELECT
  asset.hostname AS resource,
  'host' AS resource_type,
  CASE
    WHEN count(cve.plugin.id) = 0 THEN 1
    ELSE 0
  END AS compliance,
  CAST(count(cve.plugin) AS text) AS detail
FROM
  {{ ref('tenable_assets') }} AS asset
LEFT JOIN
  {{ ref('tenable_vulnerabilities') }} AS cve
ON
  asset.uuid = cve.asset.uuid
  AND cve.state IN ('OPEN', 'REOPENED')
  AND cve.severity IN ('high', 'critical')

WHERE
  CURRENT_DATE - CAST(asset.last_seen AS DATE) < 30 AND
  CURRENT_DATE - CAST(cve.last_found AS DATE) >= 30
GROUP BY
  asset.hostname