Elasticsearch domains should have audit logging enabled

[dsotirho-ucsc]

{
    "GeneratorIds": [
        "aws-foundational-security-best-practices/v/1.0.0/ES.5"
    ]
}

https://docs.aws.amazon.com/securityhub/latest/userguide/securityhub-standards-fsbp-controls.html#fsbp-es-5

---

• [ ] Security design review completed; the Resolution of this issue does not …
  • [ ] … affect authentication; for example:
  • OAuth 2.0 with the application (API or Swagger UI)
  • Authentication of developers with Google Cloud APIs
  • Authentication of developers with AWS APIs
  • Authentication with a GitLab instance in the system
  • Password and 2FA authentication with GitHub
  • API access token authentication with GitHub
  • Authentication with
  • [ ] … affect the permissions of internal users like access to
  • Cloud resources on AWS and GCP
  • GitLab repositories, projects and groups, administration
  • an EC2 instance via SSH
  • GitHub issues, pull requests, commits, commit statuses, wikis, repositories, organizations
  • [ ] … affect the permissions of external users like access to
  • TDR snapshots
  • [ ] … affect permissions of service or bot accounts
  • Cloud resources on AWS and GCP
  • [ ] … affect audit logging in the system, like
  • adding, removing or changing a log message that represents an auditable event
  • changing the routing of log messages through the system
  • [ ] … affect monitoring of the system
  • [ ] … introduce a new software dependency like
  • Python packages on PYPI
  • Command-line utilities
  • Docker images
  • Terraform providers
  • [ ] … add an interface that exposes sensitive or confidential data at the security boundary
  • [ ] … affect the encryption of data at rest
  • [ ] … require persistence of sensitive or confidential data that might require encryption at rest
  • [ ] … require unencrypted transmission of data within the security boundary
  • [ ] … affect the network security layer; for example by
  • modifying, adding or removing firewall rules
  • modifying, adding or removing security groups
  • changing or adding a port a service, proxy or load balancer listens on
• [ ] Documentation on any unchecked boxes is provided in comments below

[hannes-ucsc]

If we need to log reads and writes, this would generate tremendous amounts of logs during a reindex, and cost a lot of money. #4688 put the ES cluster into the private subnet of the VPC which means that it is not directly reachable anymore from the public internet. Before that, the only layer of defense was authentication. Now both layers protect us from unauthorized access, if someone manages to enter the VPC and make requests to ES, we have bigger problems than trying to find out what requests they made against ES.

[dsotirho-ucsc]

Marking ticket won't fix based on the previous comment.