Improper Bucket Server-Side Encryption

ID: improper-bucket-sse

Severity: medium

Author: ritikchaddha

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

Description

Determine the Server-Side Encryption (SSE) feature configuration available for the selected OSS bucket. For compliance, the SSEAlgorithm must be set to KMS.

YAML Source

id: improper-bucket-sse

info:
  name: Improper Bucket Server-Side Encryption
  author: ritikchaddha
  severity: medium
  description: |
    Determine the Server-Side Encryption (SSE) feature configuration available for the selected OSS bucket. For compliance, the SSEAlgorithm must be set to KMS.
  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,oss

variables:
  region: "cn-hangzhou"

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

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

    matchers:
      - type: regex
        regex:
          - 'SSEAlgorithm:\s?AES256'
          - 'StatusCode=404'

    extractors:
      - type: dsl
        dsl:
          - 'bucket + " Bucket SSEAlgorithm is not set to KMS"'
# digest: 490a0046304402205bdf1095c23f74d8032d8c8ed10841cd2574f186f2d0a7e6a8b484974f0079c30220378a0a9868705810364cd850515e1f5a63b7596aef948a1a65372871462b69a6:922c64590222798bb761d5b6d8e72950

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/improper-bucket-sse.yaml"

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