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362 lines
9.2 KiB
Markdown
| name | description |
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|------|-------------|
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| cloud-infrastructure-security | Use this skill when deploying to cloud platforms, configuring infrastructure, managing IAM policies, setting up logging/monitoring, or implementing CI/CD pipelines. Provides cloud security checklist aligned with best practices. |
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# 雲端與基礎設施安全技能
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此技能確保雲端基礎設施、CI/CD 管線和部署設定遵循安全最佳實務並符合業界標準。
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## 何時啟用
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- 部署應用程式到雲端平台(AWS、Vercel、Railway、Cloudflare)
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- 設定 IAM 角色和權限
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- 設置 CI/CD 管線
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- 實作基礎設施即程式碼(Terraform、CloudFormation)
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- 設定日誌和監控
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- 在雲端環境管理密鑰
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- 設置 CDN 和邊緣安全
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- 實作災難復原和備份策略
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## 雲端安全檢查清單
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### 1. IAM 與存取控制
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#### 最小權限原則
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```yaml
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# ✅ 正確:最小權限
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iam_role:
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permissions:
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- s3:GetObject # 只有讀取存取
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- s3:ListBucket
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resources:
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- arn:aws:s3:::my-bucket/* # 只有特定 bucket
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# ❌ 錯誤:過於廣泛的權限
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iam_role:
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permissions:
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- s3:* # 所有 S3 動作
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resources:
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- "*" # 所有資源
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```
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#### 多因素認證(MFA)
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```bash
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# 總是為 root/admin 帳戶啟用 MFA
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aws iam enable-mfa-device \
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--user-name admin \
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--serial-number arn:aws:iam::123456789:mfa/admin \
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--authentication-code1 123456 \
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--authentication-code2 789012
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```
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#### 驗證步驟
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- [ ] 生產環境不使用 root 帳戶
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- [ ] 所有特權帳戶啟用 MFA
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- [ ] 服務帳戶使用角色,非長期憑證
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- [ ] IAM 政策遵循最小權限
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- [ ] 定期進行存取審查
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- [ ] 未使用憑證已輪換或移除
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### 2. 密鑰管理
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#### 雲端密鑰管理器
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```typescript
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// ✅ 正確:使用雲端密鑰管理器
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import { SecretsManager } from '@aws-sdk/client-secrets-manager';
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const client = new SecretsManager({ region: 'us-east-1' });
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const secret = await client.getSecretValue({ SecretId: 'prod/api-key' });
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const apiKey = JSON.parse(secret.SecretString).key;
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// ❌ 錯誤:寫死或只在環境變數
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const apiKey = process.env.API_KEY; // 未輪換、未稽核
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```
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#### 密鑰輪換
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```bash
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# 為資料庫憑證設定自動輪換
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aws secretsmanager rotate-secret \
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--secret-id prod/db-password \
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--rotation-lambda-arn arn:aws:lambda:region:account:function:rotate \
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--rotation-rules AutomaticallyAfterDays=30
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```
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#### 驗證步驟
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- [ ] 所有密鑰儲存在雲端密鑰管理器(AWS Secrets Manager、Vercel Secrets)
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- [ ] 資料庫憑證啟用自動輪換
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- [ ] API 金鑰至少每季輪換
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- [ ] 程式碼、日誌或錯誤訊息中無密鑰
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- [ ] 密鑰存取啟用稽核日誌
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### 3. 網路安全
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#### VPC 和防火牆設定
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```terraform
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# ✅ 正確:限制的安全群組
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resource "aws_security_group" "app" {
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name = "app-sg"
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ingress {
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from_port = 443
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to_port = 443
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protocol = "tcp"
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cidr_blocks = ["10.0.0.0/16"] # 只有內部 VPC
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}
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egress {
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from_port = 443
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to_port = 443
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protocol = "tcp"
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cidr_blocks = ["0.0.0.0/0"] # 只有 HTTPS 輸出
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}
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}
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# ❌ 錯誤:對網際網路開放
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resource "aws_security_group" "bad" {
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ingress {
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from_port = 0
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to_port = 65535
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protocol = "tcp"
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cidr_blocks = ["0.0.0.0/0"] # 所有埠、所有 IP!
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}
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}
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```
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#### 驗證步驟
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- [ ] 資料庫不可公開存取
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- [ ] SSH/RDP 埠限制為 VPN/堡壘機
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- [ ] 安全群組遵循最小權限
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- [ ] 網路 ACL 已設定
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- [ ] VPC 流量日誌已啟用
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### 4. 日誌與監控
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#### CloudWatch/日誌設定
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```typescript
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// ✅ 正確:全面日誌記錄
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import { CloudWatchLogsClient, CreateLogStreamCommand } from '@aws-sdk/client-cloudwatch-logs';
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const logSecurityEvent = async (event: SecurityEvent) => {
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await cloudwatch.putLogEvents({
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logGroupName: '/aws/security/events',
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logStreamName: 'authentication',
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logEvents: [{
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timestamp: Date.now(),
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message: JSON.stringify({
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type: event.type,
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userId: event.userId,
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ip: event.ip,
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result: event.result,
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// 永遠不要記錄敏感資料
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})
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}]
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});
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};
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```
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#### 驗證步驟
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- [ ] 所有服務啟用 CloudWatch/日誌記錄
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- [ ] 失敗的認證嘗試被記錄
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- [ ] 管理員動作被稽核
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- [ ] 日誌保留已設定(合規需 90+ 天)
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- [ ] 可疑活動設定警報
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- [ ] 日誌集中化且防篡改
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### 5. CI/CD 管線安全
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#### 安全管線設定
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```yaml
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# ✅ 正確:安全的 GitHub Actions 工作流程
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name: Deploy
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on:
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push:
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branches: [main]
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jobs:
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deploy:
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runs-on: ubuntu-latest
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permissions:
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contents: read # 最小權限
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steps:
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- uses: actions/checkout@v4
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# 掃描密鑰
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- name: Secret scanning
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uses: trufflesecurity/trufflehog@main
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# 依賴稽核
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- name: Audit dependencies
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run: npm audit --audit-level=high
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# 使用 OIDC,非長期 tokens
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- name: Configure AWS credentials
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uses: aws-actions/configure-aws-credentials@v4
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with:
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role-to-assume: arn:aws:iam::123456789:role/GitHubActionsRole
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aws-region: us-east-1
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```
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#### 供應鏈安全
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```json
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// package.json - 使用 lock 檔案和完整性檢查
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{
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"scripts": {
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"install": "npm ci", // 使用 ci 以獲得可重現建置
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"audit": "npm audit --audit-level=moderate",
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"check": "npm outdated"
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}
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}
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```
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#### 驗證步驟
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- [ ] 使用 OIDC 而非長期憑證
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- [ ] 管線中的密鑰掃描
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- [ ] 依賴漏洞掃描
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- [ ] 容器映像掃描(如適用)
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- [ ] 強制執行分支保護規則
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- [ ] 合併前需要程式碼審查
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- [ ] 強制執行簽署 commits
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### 6. Cloudflare 與 CDN 安全
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#### Cloudflare 安全設定
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```typescript
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// ✅ 正確:帶安全標頭的 Cloudflare Workers
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export default {
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async fetch(request: Request): Promise<Response> {
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const response = await fetch(request);
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// 新增安全標頭
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const headers = new Headers(response.headers);
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headers.set('X-Frame-Options', 'DENY');
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headers.set('X-Content-Type-Options', 'nosniff');
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headers.set('Referrer-Policy', 'strict-origin-when-cross-origin');
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headers.set('Permissions-Policy', 'geolocation=(), microphone=()');
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return new Response(response.body, {
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status: response.status,
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headers
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});
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}
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};
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```
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#### WAF 規則
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```bash
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# 啟用 Cloudflare WAF 管理規則
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# - OWASP 核心規則集
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# - Cloudflare 管理規則集
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# - 速率限制規則
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# - Bot 保護
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```
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#### 驗證步驟
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- [ ] WAF 啟用 OWASP 規則
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- [ ] 速率限制已設定
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- [ ] Bot 保護啟用
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- [ ] DDoS 保護啟用
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- [ ] 安全標頭已設定
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- [ ] SSL/TLS 嚴格模式啟用
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### 7. 備份與災難復原
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#### 自動備份
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```terraform
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# ✅ 正確:自動 RDS 備份
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resource "aws_db_instance" "main" {
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allocated_storage = 20
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engine = "postgres"
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backup_retention_period = 30 # 30 天保留
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backup_window = "03:00-04:00"
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maintenance_window = "mon:04:00-mon:05:00"
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enabled_cloudwatch_logs_exports = ["postgresql"]
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deletion_protection = true # 防止意外刪除
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}
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```
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#### 驗證步驟
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- [ ] 已設定自動每日備份
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- [ ] 備份保留符合合規要求
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- [ ] 已啟用時間點復原
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- [ ] 每季執行備份測試
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- [ ] 災難復原計畫已記錄
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- [ ] RPO 和 RTO 已定義並測試
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## 部署前雲端安全檢查清單
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任何生產雲端部署前:
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- [ ] **IAM**:不使用 root 帳戶、啟用 MFA、最小權限政策
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- [ ] **密鑰**:所有密鑰在雲端密鑰管理器並有輪換
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- [ ] **網路**:安全群組受限、無公開資料庫
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- [ ] **日誌**:CloudWatch/日誌啟用並有保留
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- [ ] **監控**:異常設定警報
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- [ ] **CI/CD**:OIDC 認證、密鑰掃描、依賴稽核
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- [ ] **CDN/WAF**:Cloudflare WAF 啟用 OWASP 規則
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- [ ] **加密**:資料靜態和傳輸中加密
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- [ ] **備份**:自動備份並測試復原
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- [ ] **合規**:符合 GDPR/HIPAA 要求(如適用)
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- [ ] **文件**:基礎設施已記錄、建立操作手冊
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- [ ] **事件回應**:安全事件計畫就位
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## 常見雲端安全錯誤設定
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### S3 Bucket 暴露
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```bash
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# ❌ 錯誤:公開 bucket
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aws s3api put-bucket-acl --bucket my-bucket --acl public-read
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# ✅ 正確:私有 bucket 並有特定存取
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aws s3api put-bucket-acl --bucket my-bucket --acl private
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aws s3api put-bucket-policy --bucket my-bucket --policy file://policy.json
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```
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### RDS 公開存取
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```terraform
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# ❌ 錯誤
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resource "aws_db_instance" "bad" {
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publicly_accessible = true # 絕不這樣做!
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}
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# ✅ 正確
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resource "aws_db_instance" "good" {
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publicly_accessible = false
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vpc_security_group_ids = [aws_security_group.db.id]
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}
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```
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## 資源
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- [AWS Security Best Practices](https://aws.amazon.com/security/best-practices/)
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- [CIS AWS Foundations Benchmark](https://www.cisecurity.org/benchmark/amazon_web_services)
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- [Cloudflare Security Documentation](https://developers.cloudflare.com/security/)
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- [OWASP Cloud Security](https://owasp.org/www-project-cloud-security/)
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- [Terraform Security Best Practices](https://www.terraform.io/docs/cloud/guides/recommended-practices/)
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**記住**:雲端錯誤設定是資料外洩的主要原因。單一暴露的 S3 bucket 或過於寬鬆的 IAM 政策可能危及你的整個基礎設施。總是遵循最小權限原則和深度防禦。
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