terraform.aws.security.aws-rds-backup-no-retention.aws-rds-backup-no-retention

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The AWS RDS has no retention. Missing retention can cause losing important event information. To fix this, set a backup_retention_period.

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Defintion

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rules:
  - id: aws-rds-backup-no-retention
    patterns:
      - pattern-either:
          - pattern: |
              resource "aws_rds_cluster" $ANYTHING {
                ...
                backup_retention_period = 0
                ...
              }
          - pattern: |
              resource "aws_db_instance" $ANYTHING {
                ...
                backup_retention_period = 0
                ...
              }
    message: The AWS RDS has no retention. Missing retention can cause losing
      important event information. To fix this, set a `backup_retention_period`.
    languages:
      - hcl
    severity: WARNING
    metadata:
      owasp:
        - A03:2017 - Sensitive Data Exposure
      cwe:
        - "CWE-320: CWE CATEGORY: Key Management Errors"
      technology:
        - aws
        - terraform
      category: security
      references:
        - https://owasp.org/Top10/A02_2021-Cryptographic_Failures
      subcategory:
        - vuln
      likelihood: MEDIUM
      impact: MEDIUM
      confidence: MEDIUM
      license: Commons Clause License Condition v1.0[LGPL-2.1-only]
      vulnerability_class:
        - Cryptographic Issues

Examples

aws-rds-backup-no-retention.tf

resource "aws_rds_cluster" "pass" {
  backup_retention_period = 35
}

resource "aws_rds_cluster" "pass2" {
}
# ruleid: aws-rds-backup-no-retention
resource "aws_rds_cluster" "fail2" {
  backup_retention_period = 0
}

resource "aws_db_instance" "pass" {
  backup_retention_period = 35
}

resource "aws_db_instance" "pass2" {
}
# ruleid: aws-rds-backup-no-retention
resource "aws_db_instance" "fail" {
  backup_retention_period = 0
}