Contained Database Authentication Enabled in SQL Server Database Instances

ID: gcloud-sql-contained-db-authentication-enabled

Severity: medium

Author: princechaddha

Tags: cloud,devops,gcp,gcloud,google-cloud-sql,sqlserver,gcp-cloud-config

Description

Ensure that the “contained database authentication” database flag is disabled for your Google Cloud SQL Server database instances. This flag, when enabled, allows databases to contain their authentication and can potentially lead to security vulnerabilities.

YAML Source

id: gcloud-sql-contained-db-authentication-enabled

info:
  name: Contained Database Authentication Enabled in SQL Server Database Instances
  author: princechaddha
  severity: medium
  description: |
    Ensure that the "contained database authentication" database flag is disabled for your Google Cloud SQL Server database instances. This flag, when enabled, allows databases to contain their authentication and can potentially lead to security vulnerabilities.
  impact: |
    Enabling the "contained database authentication" flag can introduce security risks by allowing databases to manage authentication independently, bypassing centralized security controls.
  remediation: |
    Disable the "contained database authentication" flag in your SQL Server database instance configuration to enhance security and enforce centralized authentication.
  reference:
    - https://cloud.google.com/sql/docs/sqlserver/flags
  tags: cloud,devops,gcp,gcloud,google-cloud-sql,sqlserver,gcp-cloud-config

flow: |
  code(1)
  for(let projectId of iterate(template.projectIds)){
    set("projectId", projectId)
    code(2)
    for(let sqlInstance of iterate(template.sqlInstances)){
      set("sqlInstance", sqlInstance)
      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 sql instances list --project $projectId --filter=DATABASE_VERSION:SQLSERVER* --format="json(name)"

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

  - engine:
      - sh
      - bash
    source: |
      gcloud sql instances describe $sqlInstance --project $projectId --format=json | jq -r '.settings.databaseFlags[]? | select(.name=="contained database authentication") | .value // "null"'

    matchers:
      - type: word
        words:
          - 'on'

    extractors:
      - type: dsl
        dsl:
          - '"The contained database authentication flag is enabled for SQL Server instance " + sqlInstance + " in project " + projectId'
# digest: 4b0a004830460221009d7af3ce9bb0c3248c801ba776c3d94a4b60b1f7ac031e8ac0ec07726f637b76022100db7059bad1126aa8dfaf144495d992bd9cfac3635264e239a0f86d7885f50d20:922c64590222798bb761d5b6d8e72950

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/sql/gcloud-sql-contained-db-authentication-enabled.yaml"

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