rules:
- id: aws-cloudwatch-log-group-no-retention
  patterns:
  - pattern: |
      resource "aws_cloudwatch_log_group" $ANYTHING {
        ...
      }
  - pattern-not-inside: |
      resource "aws_cloudwatch_log_group" $ANYTHING {
        ...
        retention_in_days = ...
        ...
      }
  message: The AWS CloudWatch Log Group has no retention. Missing retention in log groups can cause losing
    important event information.
  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