SSH Key Rotation - 90-Day Policy

ID: iam-ssh-keys-rotation

Severity: high

Author: princechaddha

Tags: cloud,devops,aws,amazon,iam,ssh,aws-cloud-config

Description

Verifies that IAM SSH public keys are rotated every 90 days, enhancing security and preventing unauthorized access to AWS CodeCommit repositories

YAML Source

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

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/aws/iam/iam-ssh-keys-rotation.yaml"

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