iam-ssh-keys-rotation: SSH Key Rotation - 90-Day Policy

id: iam-ssh-keys-rotation
info:
  name: SSH Key Rotation - 90-Day Policy
  author: princechaddha
  severity: high
  description: |
    Verifies that IAM SSH public keys are rotated every 90 days, enhancing security and preventing unauthorized access to AWS CodeCommit repositories
  reference:
    - https://docs.aws.amazon.com/cli/latest/reference/iam/list-ssh-public-keys.html
  metadata:
    max-request: 2
  tags: cloud,devops,aws,amazon,iam,ssh,aws-cloud-config

flow: |
  code(1)
  for(let UserName of iterate(template.users)){
    set("user", UserName)
    code(2)
  }

self-contained: true
code:
  - engine:
      - sh
      - bash
    source: |
      aws iam list-users --query 'Users[*].UserName'

    extractors:
      - type: json # type of the extractor
        internal: true
        name: users
        json:
          - '.[]'

  - engine:
      - sh
      - bash
    source: |
         aws iam list-ssh-public-keys --user-name $user | jq -r '.SSHPublicKeys[] | select(.UploadDate | fromdateiso8601 < (now - (90 * 86400))) | .SSHPublicKeyId'

    extractors:
      - type: regex # type of the extractor
        name: accesskey
        internal: true
        regex:
          - '^AP.*'

      - type: dsl
        dsl:
          - '"The SSH Public Key " + accesskey +" is older than 90 days"'
# digest: 4a0a004730450221008e725b347dbe75b49ef09c2106a669f9299cca4a153694ee0d071d16131196b6022049fe3c78c09fb8ea6d6c4c50e592fb0e9e5fc00d42129e8ab5c41ffcd95c9fbf:922c64590222798bb761d5b6d8e72950