Log Statement Flag Not Configured Properly for PostgreSQL Database Instances

ID: gcloud-pg-log-statement-flag-not-configured

Severity: medium

Author: princechaddha

Tags: cloud,devops,gcp,gcloud,google-cloud-sql,postgresql,logging,gcp-cloud-config

Description

Ensure that the “log_statement” database flag configured for your Google Cloud PostgreSQL database instances has the appropriate value (logging level) in accordance with your organization’s logging policy. The “log_statement” flag controls which SQL statements are logged, with valid values being: none, ddl, mod, and all.

YAML Source

id: gcloud-pg-log-statement-flag-not-configured

info:
  name: Log Statement Flag Not Configured Properly for PostgreSQL Database Instances
  author: princechaddha
  severity: medium
  description: |
    Ensure that the "log_statement" database flag configured for your Google Cloud PostgreSQL database instances has the appropriate value (logging level) in accordance with your organization's logging policy. The "log_statement" flag controls which SQL statements are logged, with valid values being: none, ddl, mod, and all.
  impact: |
    An improperly configured "log_statement" flag can result in either excessive logging, which impacts performance, or insufficient logging, which hinders troubleshooting and auditing.
  remediation: |
    Set the "log_statement" flag to the appropriate value (e.g., mod) based on your organization's logging policy to balance performance and logging requirements.
  reference:
    - https://cloud.google.com/sql/docs/postgres/flags
  tags: cloud,devops,gcp,gcloud,google-cloud-sql,postgresql,logging,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:POSTGRES* --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=="log_statement") | .value // "null"'

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

    extractors:
      - type: dsl
        dsl:
          - '"The log_statement flag is not configured or is set to an inappropriate value for PostgreSQL instance " + sqlInstance + " in project " + projectId'
# digest: 4b0a00483046022100c3f4b8b166f8a753a7b337572a22e14613bc854d94456f126d6900eb5c8faaaf022100da9e70bcb45595b51b02e43e7dcdb1559570321389f8820317a46d334a0b7d7a: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-pg-log-statement-flag-not-configured.yaml"

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