Skip Show Database Flag Not Enabled for MySQL Instances

ID: gcloud-sql-skip-show-database-disabled

Severity: medium

Author: princechaddha

Tags: cloud,devops,gcp,gcloud,google-cloud-sql,mysql-database,gcp-cloud-config

Description

Ensure that the “skip_show_database” database flag is enabled for your Google Cloud MySQL database instances in order to prevent users from using the SHOW DATABASES statement if they don’t have this privilege.

YAML Source

id: gcloud-sql-skip-show-database-disabled

info:
  name: Skip Show Database Flag Not Enabled for MySQL Instances
  author: princechaddha
  severity: medium
  description: |
    Ensure that the "skip_show_database" database flag is enabled for your Google Cloud MySQL database instances in order to prevent users from using the SHOW DATABASES statement if they don't have this privilege.
  impact: |
    If the "skip_show_database" flag is not enabled, unauthorized users may view a list of all databases, leading to potential data exposure and compliance violations.
  remediation: |
    Enable the "skip_show_database" flag for MySQL database instances in Google Cloud. This can be configured in the database settings under the databaseFlags section or through the gcloud CLI.
  reference:
    - https://cloud.google.com/sql/docs/mysql/configure-database-flags
  tags: cloud,devops,gcp,gcloud,google-cloud-sql,mysql-database,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:MYSQL*' --format="json(name)"

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

  - engine:
      - sh
      - bash
    source: |
      gcloud sql instances describe $sqlInstance --format="json(settings.databaseFlags)"

    matchers:
      - type: word
        words:
          - 'off'

    extractors:
      - type: dsl
        dsl:
          - '"Skip Show Database Flag is not enabled for MySQL instance " + sqlInstance + " in project " + projectId'
# digest: 4a0a0047304502210089fc2fe89b0fccb9e84ecc615cab20a30743920c192aecbbf2e5b081f720bae602206ddec899a96358eb9e143d69babb19763cfa5589e04086a0db1847b06eea4d4b: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-skip-show-database-disabled.yaml"

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