Server-Side Encryption with Customer Managed Key - Disabled

ID: sse-cmk-disabled

Severity: high

Author: ritikchaddha

Tags: cloud,devops,aliyun,alibaba,aliyun-cloud-config,ecs

Description

Ensure that Server-Side Encryption (SSE) is using customer-managed keys (CMKs) instead of service-managed keys to protect your OSS data at rest. SSE with customer-managed keys (also known as Bring Your Own Key - BYOK) enables you to have full control over the encryption and decryption process and meet strict compliance requirements.

YAML Source

id: sse-cmk-disabled

info:
  name: Server-Side Encryption with Customer Managed Key - Disabled
  author: ritikchaddha
  severity: high
  description: |
    Ensure that Server-Side Encryption (SSE) is using customer-managed keys (CMKs) instead of service-managed keys to protect your OSS data at rest. SSE with customer-managed keys (also known as Bring Your Own Key - BYOK) enables you to have full control over the encryption and decryption process and meet strict compliance requirements.
  reference:
    - https://www.trendmicro.com/cloudoneconformity/knowledge-base/alibaba-cloud/AlibabaCloud-OSS/enable-sse-with-customer-managed-key.html
  metadata:
    max-request: 1
    verified: true
  tags: cloud,devops,aliyun,alibaba,aliyun-cloud-config,ecs

variables:
  region: "cn-hangzhou"

flow: |
  code(1)
  for (let BucketName of iterate(template.bucketname)) {
    set("bucket", BucketName)
    code(2)
    for (let KMSMasterKeyID of iterate(template.KmsID)) {
      set("KmsID", KMSMasterKeyID)
      code(3)
    }
  }

self-contained: true

code:
  - engine:
      - sh
      - bash
    source: |
      ossutil ls -s --region $region

    extractors:
      - type: regex
        name: bucketname
        internal: true
        regex:
          - 'oss://([a-zA-Z0-9-]+)'

  - engine:
      - sh
      - bash
    source: |
      ossutil bucket-encryption --method get $bucket --RegionId $region

    extractors:
      - type: regex
        name: KmsID
        internal: true
        regex:
          - 'KMSMasterKeyID: ([a-z0-9-]+)'

  - engine:
      - sh
      - bash

    source: |
      aliyun kms DescribeKey --KeyId $KmsID --RegionId $region

    matchers-condition: and
    matchers:
      - type: word
        words:
          - 'Creator": "Rds'

    extractors:
      - type: dsl
        dsl:
          - 'KmsID + " SSE with customer-managed keys Disable"'
# digest: 4b0a00483046022100b066e8817becee38cb2b4857e6b84c939bb4cc9db6dae5efa90543d3c1becd57022100ecf71b3ad8d9d15f7eecc8f24441926de5d67b184ca58119e77fb12add36bfe2:922c64590222798bb761d5b6d8e72950

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/alibaba/oss/sse-cmk-disabled.yaml"

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