Automatic Runtime Security Updates Disabled in Google Cloud Functions

ID: gcloud-func-auto-runtime-updates-disabled

Severity: medium

Author: princechaddha

Tags: cloud,devops,gcp,gcloud,google-cloud-functions,gcp-cloud-config

Description

Ensure that automatic runtime security updates are enabled for your Google Cloud functions in order to keep the functions secure and protected against vulnerabilities without manual intervention.

YAML Source

id: gcloud-func-auto-runtime-updates-disabled

info:
  name: Automatic Runtime Security Updates Disabled in Google Cloud Functions
  author: princechaddha
  severity: medium
  description: |
    Ensure that automatic runtime security updates are enabled for your Google Cloud functions in order to keep the functions secure and protected against vulnerabilities without manual intervention.
  impact: |
    Having automatic runtime security updates disabled can expose Google Cloud functions to vulnerabilities which could be mitigated by timely updates.
  remediation: |
    Enable automatic runtime security updates for each Google Cloud function by setting the `serviceConfig.minInstanceCount` to a non-null value, ensuring functions are automatically updated with the latest security patches.
  reference:
    - https://cloud.google.com/functions/docs/securing/managing-security
  tags: cloud,devops,gcp,gcloud,google-cloud-functions,gcp-cloud-config

flow: |
  code(1)
  for(let projectId of iterate(template.projectIds)){
    set("projectId", projectId)
    code(2)
    for(let functionDetail of iterate(template.functions)){
      set("functionName", functionDetail)
      code(3)
    }
  }

self-contained: true

code:
  - engine:
      - sh
      - bash
    source: |
      gcloud projects list --format="json(projectId)"

    extractors:
      - type: json
        name: projectIds
        internal: true
        json:
          - '.[].projectId'

  - engine:
      - sh
      - bash
    source: |
      gcloud functions list --project $projectId --format="json(name)"

    extractors:
      - type: json
        name: functions
        internal: true
        json:
          - '.[].name'

  - engine:
      - sh
      - bash
    source: |
      gcloud functions describe $functionName --format="json(serviceConfig.minInstanceCount)"

    matchers:
      - type: word
        words:
          - 'null'

    extractors:
      - type: dsl
        dsl:
          - '"Automatic Runtime Security Updates Disabled in function: " + functionName + " in Project: " + projectId'
# digest: 4b0a00483046022100f41be90788c213768a91b9c804665007a6c775591d782d20231cd9998493e0e0022100b4216a242eded9560fcb101e7f96643795aa055c7fe359c346a82eca90de74cb:922c64590222798bb761d5b6d8e72950

Guide to check the vulnerabilities

This template is used to detect vulnerabilities in web applications. It can be used with the Nuclei tool to scan for specific patterns or behaviors.

$ nuclei -u "URL" -t "cloud/gcp/function/gcloud-func-auto-runtime-updates-disabled.yaml"

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