OS vulnerabilities not remediated within SLO - patchable exploitable

Description

The percentage of systems that were active in the last 30 days that have resolved patchable, exploitable operating system vulnerabilities within the agreed Service Level Objective (SLO), providing critical insight into the organisation's "Patch Tuesday Priority" - Just bloody patch it effectiveness.

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_performance_patchable_exploitable_os
Category	Vulnerability Management
SLO	95.00% - 98.00%
Weight	0.9
Type

References

Framework	Ref	Domain	Control
CIS 8.1	7.7	Continuous Vulnerability Management	Remediate Detected Vulnerabilities
ISO 27001:2022	A.8.8	8 Technological controls	Management of technical vulnerabilities
NIST CSF v2.0	ID.RA-01	Risk Assessment (ID.RA)	ID.RA-01: Vulnerabilities in assets are identified, validated, and recorded

Code

SELECT
  host.hostname AS resource,
  'host'    AS resource_type,
  CASE
    WHEN cve.status NOT IN ('open', 'reopen') then 1
    WHEN CURRENT_DATE - CAST(cve.published_date AS DATE) < 7 THEN 1
    WHEN CURRENT_DATE - CAST(cve.created_timestamp AS DATE) < 3 THEN 1
    ELSE 0
  END AS compliance,
  'Crowdstrike : ' || cve.cve.id || '(' || cve.severity || ') - ' || unnest(cve.remediation.entities).title 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')
WHERE
  CURRENT_DATE - CAST(STRPTIME(host.last_seen, '%Y-%m-%dT%H:%M:%SZ') AS DATE) < 30 AND
  coalesce(cve.cve.remediation_level = 'O', false) is true AND
  coalesce(cve.cve.exploit_status > 0, false) is true AND
  cve.severity IN ('HIGH', 'CRITICAL')

SELECT
  cve.asset.hostname as resource,
  'host'    AS resource_type,
  CASE
    WHEN cve.state NOT IN ('OPEN', 'REOPENED') then 1
    WHEN CURRENT_DATE - CAST(cve.plugin.publication_date AS DATE) < 7 THEN 1
    WHEN CURRENT_DATE - CAST(cve.first_found AS DATE) < 3 THEN 1
    ELSE 0
  END AS compliance,
  'TenableIO : ' || unnest(cve.plugin.cve) || '(' || cve.severity || ') - ' || cve.plugin.name AS detail
FROM
  {{ ref('tenable_vulnerabilities') }} AS cve
WHERE
  CURRENT_DATE - CAST(cve.last_found AS DATE) < 30 AND
  cve.plugin.exploit_available is true AND
  cve.plugin.has_patch is true AND
  cve.severity in ('high','critical')