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api-security

Guide authorized API security assessments from endpoint discovery to documented findings. Use a staged workflow to examine authentication, access permissions, input handling, data exposure, and request limits across REST, GraphQL, WebSocket, and SOAP APIs.

한국어 요약은 준비 중입니다. 영어 요약을 표시하고 있습니다.

원문원문 설명 보기

Authorized security assessment of REST, GraphQL, WebSocket, and SOAP APIs: discovery, authentication and authorization flaws (BOLA/IDOR, JWT/OAuth), rate-limit testing, and a structured multi-phase methodology.

설치 방법 보기

이럴 때 유용합니다

  • Planning an authorized API security assessment
  • Reviewing JWT and OAuth 2.0 authentication
  • Checking permissions across users and roles
  • Assessing GraphQL exposure and request limits

포함된 파일(3)

  • SKILL.md6.8 KB
  • references/jwt-oauth-testing.md2.9 KB
  • references/rest-graphql-testing.md3.2 KB

SKILL.md(원문)

설치하기 전에 에이전트에게 전달되는 지시 내용을 확인할 수 있습니다.

⚠️ AUTHORIZED USE ONLY This skill is for educational purposes or authorized security assessments only. You must have explicit, written permission from the system owner before using this tool. Misuse of this tool is illegal and strictly prohibited.

Mandatory confirmation gate Before running any command that probes, exploits, changes, persists on, extracts data from, or attempts credential access against a target:

  1. Ask the user to state the exact target URL, IP, account, or resource.
  2. Ask the user to confirm written authorization and the permitted scope.
  3. Show the exact command(s) and explain their expected effect.
  4. Wait for explicit confirmation in the current conversation.

Without that confirmation, remain read-only and provide defensive guidance only. Prefer a sandbox, disposable VM, or controlled lab.

API 安全测试

When to Use

  • An authorized assessment covers API endpoints and you need a structured discovery-to-report workflow.
  • Testing API authentication, authorization, or rate-limiting behavior within an approved scope.

适用场景

  • REST API 安全测试(OpenAPI/Swagger 驱动或盲测)
  • GraphQL 安全审计(内省、批查询、别名过载)
  • WebSocket 安全测试
  • JWT / OAuth 2.0 认证测试
  • BOLA/IDOR/BFLA 授权漏洞检测
  • API 限速绕过与 DoS 测试

10 阶段测试流程

Phase 1: API 发现与侦察

主动发现:
□ Vespasian: 无头浏览器爬取 → 自动生成 OpenAPI 3.0 / GraphQL SDL 规范
□ Entropy --discover: 从 robots.txt + JS 文件提取端点
□ Kiterunner / ffuf: 爆破未文档化的端点路径
□ 检查常见路径: /swagger.json, /openapi.json, /graphql, /api-docs

GraphQL 内省(三级尝试):
  1. 标准内省查询
  2. 精简查询(绕过 WAF 全量封禁)
  3. 仅查 __schema { types { name } }(最小探测)

Phase 2: 认证测试

JWT 分析(jwt_tool / Burp):
□ alg:none 攻击: 修改头部为 "alg":"none",清空签名
□ 密钥混淆: RS256 公钥 → HS256 对称密钥
□ 弱 HMAC 密钥爆破: jwt_tool -C -d wordlist.txt
□ 过期/声明篡改: 修改 exp/iat/sub/role 声明
□ kid 注入: ../../etc/passwd → HMAC 签名绕过

OAuth 2.0:
□ redirect_uri 操控 → 授权码泄漏
□ CSRF via state 参数缺失
□ Token 在 Referer 头泄漏
□ PKCE 缺失检测

GraphQL 认证:
□ mutation 通过 GET 请求绕过认证(CSRF)
□ 批查询认证绕过

Phase 3: 授权测试(BOLA/IDOR/BFLA)

BOLA(对象级授权绕过):
□ 遍历数字 ID: /user/1 → /user/2 → /user/3
□ 遍历 UUID
□ 遍历用户名/邮箱
□ Burp Autorize: 双会话重放对比

BFLA(功能级授权绕过):
□ 普通用户执行管理员 API
□ HTTP 方法切换: GET → PUT → PATCH → DELETE
□ API 版本降级: /v2/admin → /v1/admin
□ 批量操作注入: {"users": [1,2,3]} → {"users": [1,2,3,admin_id]}

工具: Burp Autorize, AuthMatrix, Entropy (malicious_insider persona)

Phase 4: GraphQL 专项

内省泄漏 → 信息暴露检测
别名过载 → 100+ 别名 DoS
批查询 → 10+ 同时查询 DoS
字段重复 → __typename × 500
指令过载 → 递归 @skip/@include
循环查询 → 深度嵌套内省递归
字段建议 → 错误消息信息泄漏
GraphiQL/Playground 暴露 → IDE 公开风险
GET 突变 → CSRF 风险
追踪/调试模式 → 元数据泄漏

工具: FireTail, Escape DAST, api.sh (Phases 1-3)

Phase 5: REST 输入验证

□ HTTP 方法切换: GET→POST→PUT→DELETE→OPTIONS→PATCH
□ Content-Type 篡改: JSON→XML→multipart
□ NoSQL 注入: {"username": {"$gt": ""}}
□ SSRF via URL 参数: webhook URL/头像 URL/导入 URL
□ XXE in XML 端点
□ 参数污染: /api?role=user&role=admin
□ 批量赋值: 向请求体添加 is_admin: true

Phase 6: 业务逻辑与差分测试

□ Entropy compare: diff v1 vs v2 API → 状态码变化/字段删除/延迟回归
□ 多角色工作流测试: admin/user/readonly 权限矩阵
□ 优惠券/积分/价格操控
□ 竞态条件: 并发请求测试 TOCTOU

Phase 7: WebSocket 测试

□ 端点发现
□ 消息注入(注入 payload、原型污染)
□ 超大消息处理
□ 类型混淆
□ 跨站点 WebSocket 劫持(CSWH)

Phase 8: 限速与 DoS

□ 限速绕过 via 头部: X-Forwarded-For, X-Real-IP
□ 路径变体: /api/ → /api → /Api/ → /API/
□ Slowloris 低带宽耗尽
□ GraphQL 批查询深度嵌套 DoS
□ IP 轮换测试(ProxyCat 代理池)

Phase 9: 数据暴露

□ 响应过度暴露: 对比 API 返回 vs UI 展示
□ 分页枚举: ?page=1&limit=10000
□ 错误消息信息泄漏: 堆栈跟踪/内部路径/SQL 错误
□ GraphQL 嵌套遍历访问越权数据
□ OpenAPI 规范暴露敏感端点

Phase 10: CI/CD 集成

□ Entropy --ci --watch: spec 变更时自动重跑
□ Escape DAST: 按严重度阈值自动阻断构建
□ 发现持久化为回归测试
□ StackHawk(开发者优先、ZAP 内核)

工具链

工具用途获取
Vespasian流量 → OpenAPI/GraphQL 规范GitHub: praetorian-inc/vespasian
EntropyLLM 生成攻击场景,5 personasGitHub: arjinexe/entropy-chaos
Escape DAST业务逻辑安全测试escape.tech
api.sh8 阶段全协议攻击管道GitHub: Sharon-Needles/api
FireTailGraphQL 12 专项测试firetail.ai
jwt_toolJWT 全面测试GitHub: ticarpi/jwt_tool
Burp Autorize双会话授权对比Burp BApp Store

参考

  • references/rest-graphql-testing.md — REST + GraphQL 深度测试
  • references/jwt-oauth-testing.md — JWT + OAuth 安全测试

任务完成自检(声称完成前 MUST 通过)

  • 我是否执行了工作流中的每一步(而不是只阅读)?
  • 我是否基于 tool-index 使用了真实工具路径?
  • 我是否产出了可复现证据(命令/脚本/截图/报告)?
  • 我是否完成并回写了 RULES 要求的 Checklist 项?

Limitations

  • Only run against APIs you are explicitly authorized to test.
  • Some checks are intrusive; prefer non-production mirrors when available.

Adapted from zhaoxuya520/reverse-skill (MIT).

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