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yaklang/subdomain-takeover

子域名接管检测与利用工具。当目标存在悬空的CNAME/NS/MX记录，指向已弃用的云资源、过期第三方服务或未被认领的SaaS租户时，攻击者可注册这些服务并在受害者域名下提供内容。

subdomain-takeover 是什么？

该技能专注于子域名接管漏洞的自动化检测与利用流程。子域名接管通常发生在DNS记录（如CNAME、NS、MX）指向已过期或已删除的外部服务（如AWS S3存储桶、GitHub Pages、Heroku等），而这些服务可以被攻击者重新注册并控制，从而在受害者域名下托管恶意内容。此技能支持多种主流云平台和SaaS服务，能够自动验证悬空DNS记录并提供利用方法。它帮助安全工程师快速识别高危子域名，评估接管可行性，并生成报告。技能适用于渗透测试、红队演练和安全审计场景。

兼容平台~Claude Code~Codex CLI~Cursor
npx skills add https://github.com/yaklang/hack-skills/tree/main/skills/subdomain-takeover

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文档

subdomain-takeover 是做什么的？

子域名接管检测与利用工具。当目标存在悬空的CNAME/NS/MX记录，指向已弃用的云资源、过期第三方服务或未被认领的SaaS租户时，攻击者可注册这些服务并在受害者域名下提供内容。

核心功能

  • 自动枚举目标域名的DNS记录（CNAME、NS、MX）
  • 检测指向常见云平台（AWS S3、Azure、GitHub Pages、GitLab Pages、Heroku、CloudFront等）的悬空记录
  • 验证服务是否可被注册：通过HTTP响应、错误页面特征或DNS解析结果判断
  • 自动生成利用代码或配置模板（如S3存储桶策略、Cloudflare Worker脚本）
  • 输出结构化报告，包含漏洞详情、利用步骤和修复建议

支持平台

平台检测方法利用方式
AWS S3HTTP 404 / NoSuchBucket创建同名存储桶
GitHub PagesHTTP 404 / 自定义404页创建同名仓库
HerokuDNS未解析 / no-such-app创建同名Heroku应用
Azure错误码 / 租户不存在注册同名Azure资源

使用示例

# 检测单个域名的子域名接管风险
yak subdomain-takeover --domain example.com

# 从文件批量检测
yak subdomain-takeover --list targets.txt

# 输出JSON格式报告
yak subdomain-takeover --domain example.com --output json

依赖

  • Yaklang >= 1.3.0
  • DNS解析库（内置）
  • HTTP客户端（内置）

注意事项

  • 仅在获得授权的情况下使用
  • 某些平台可能需要API密钥才能完成注册
  • 自动注册前请检查目标组织的范围和政策
  • 部分平台（如Cloudflare）可能存在反自动化机制

参考链接

Individual skills in this repo

This repo contains 20 individual skills — each has its own dedicated page.

yaklang/401-403-bypass-techniques

401/403 bypass playbook. Use when encountering access-denied responses on admin panels, API endpoints, or restricted paths. Covers path manipulation, HTTP method tampering, header injection, protocol downgrade, and automated bypass tools.

yaklang/active-directory-acl-abuse

Active Directory ACL abuse playbook. Use when exploiting misconfigured AD permissions including GenericAll, WriteDACL, DCSync rights, shadow credentials, LAPS reading, GPO abuse, and BloodHound-guided attack paths.

yaklang/active-directory-certificate-services

AD Certificate Services attack playbook. Use when targeting misconfigured AD CS for privilege escalation via ESC1-ESC13 template abuse, NTLM relay to enrollment, CA officer abuse, and certificate-based persistence.

yaklang/active-directory-kerberos-attacks

Kerberos attack playbook for Active Directory. Use when targeting AD authentication via AS-REP roasting, Kerberoasting, golden/silver/diamond tickets, delegation abuse, or pass-the-ticket attacks.

yaklang/ai-ml-security

AI/ML security playbook. Use when assessing model supply chain attacks (pickle RCE, poisoned weights), adversarial examples, model poisoning, model stealing, data privacy attacks (membership inference, model inversion), and autonomous agent security risks.

yaklang/android-pentesting-tricks

Android pentesting playbook. Use when testing Android applications for SSL pinning bypass, exported component abuse, WebView vulnerabilities, intent redirection, root detection bypass, tapjacking, and backup extraction during authorized mobile security assessments.

yaklang/anti-debugging-techniques

Anti-debugging detection and bypass playbook. Use when reversing protected binaries that detect debuggers via ptrace, PEB flags, timing checks, or signal/exception handlers on Linux and Windows.

yaklang/api-auth-and-jwt-abuse

API authentication and JWT abuse playbook. Use when testing bearer tokens, API keys, claim trust, header spoofing, rate limits, and API auth boundary weaknesses.

yaklang/api-authorization-and-bola

API authorization and BOLA testing playbook. Use when APIs expose object identifiers, nested resources, hidden writable fields, or weak function-level authorization.

yaklang/api-recon-and-docs

API reconnaissance and documentation review playbook. Use when discovering endpoints, schemas, versions, OpenAPI specs, hidden docs, and surface area for API testing.

yaklang/api-sec

Entry P1 category router for API security. Use when choosing between API recon, authorization, token abuse, and hidden-parameter workflows before any deeper API topic skill.

yaklang/arbitrary-write-to-rce

Arbitrary write to RCE playbook. Use when you have an arbitrary write primitive (from heap exploitation, format string, or OOB write) and need to convert it into code execution by targeting GOT, hooks, _IO_FILE vtable, exit_funcs, TLS_dtor_list, modprobe_path, .fini_array, or C++ vtables.

yaklang/authbypass-authentication-flaws

Authentication bypass testing playbook. Use when assessing login flows, password reset logic, account recovery, MFA bypass, token predictability, brute-force resistance, and session boundary flaws.

yaklang/auth-sec

Entry P1 category router for authentication and authorization. Use when testing login flows, sessions, object authorization, JWT, OAuth, CORS, CSRF, and enterprise SSO weaknesses before any deeper auth topic skill.

yaklang/binary-protection-bypass

Binary protection bypass playbook. Use when identifying and bypassing ASLR, PIE, NX/DEP, stack canary, RELRO, FORTIFY_SOURCE, CET, and MTE protections in ELF binaries to enable exploitation.

yaklang/browser-exploitation-v8

Browser and V8 exploitation playbook. Use when exploiting JavaScript engine vulnerabilities including JIT type confusion, incorrect bounds elimination, and V8 sandbox bypass to achieve renderer RCE and sandbox escape in Chrome/Chromium.

yaklang/business-logic-vuln

Entry P1 category router for business logic testing. Use when workflow abuse, race conditions, pricing flaws, or multi-step state attacks matter more than parser-level input injection.

yaklang/business-logic-vulnerabilities

Business logic vulnerability playbook. Use when reasoning about workflows, race conditions, price manipulation, coupon abuse, state machines, and multi-step authorization gaps.

yaklang/classical-cipher-analysis

Classical cipher analysis playbook. Use when encountering substitution ciphers, Vigenere, transposition, XOR, or encoded text in CTF challenges that requires frequency analysis, Kasiski examination, or known-plaintext cryptanalysis.

yaklang/clickjacking

Clickjacking playbook. Use when testing whether target pages can be framed, whether X-Frame-Options or CSP frame-ancestors are properly configured, and whether UI redress attacks can trigger sensitive actions.

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