{"height":"190","provider_name":"Hatena Blog","categories":["Security"],"title":"CTF\u306eWeb\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u306b\u304a\u3051\u308bJavaScript,nodejs\u307e\u3068\u3081\uff08Prototype pollution, \u96e3\u8aad\u5316\uff09","provider_url":"https://hatena.blog","blog_url":"https://blog.hamayanhamayan.com/","description":"\u3053\u306e\u8a18\u4e8b\u306fCTF\u306eWeb\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3 Advent Calendar 2021\u306e18\u65e5\u76ee\u306e\u8a18\u4e8b\u3067\u3059\u3002 \u672c\u307e\u3068\u3081\u306fWeb\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u3067\u5171\u901a\u3057\u3066\u4f7f\u3048\u307e\u3059\u304c\u3001\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u30b3\u30f3\u30c6\u30b9\u30c8\uff08CTF\uff09\u3067\u4f7f\u3046\u305f\u3081\u306e\u307e\u3068\u3081\u3067\u3059\u3002 \u60aa\u7528\u3057\u306a\u3044\u3053\u3068\u3002\u52dd\u624b\u306b\u666e\u901a\u306e\u30b5\u30fc\u30d0\u3067\u8a66\u884c\u3059\u308b\u3068\u72af\u7f6a\u3067\u3059\u3002 JavaScript / node.js RCE\u30ef\u30f3\u30e9\u30a4\u30ca\u30fc console.log(process.mainModule.require('child_process').execSync('ls -la').toString()); \u9069\u5f53\u306b\u30b3\u30de\u30f3\u30c9\u30a4\u30f3\u30b8\u30a7\u30af\u30b7\u30e7\u30f3\u3059\u308b\u3068\u304d \u3044\u308d\u3044\u308d&&\u30b3\u30de\u30f3\u30c9;//\u3044\u308d\u3044\u308d\u307f\u305f\u3044\u306a\u611f\u3058\u306b\u3059\u308b\u3068\u2026","version":"1.0","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fblog.hamayanhamayan.com%2Fentry%2F2021%2F12%2F18%2F132420\" title=\"CTF\u306eWeb\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u306b\u304a\u3051\u308bJavaScript,nodejs\u307e\u3068\u3081\uff08Prototype pollution, \u96e3\u8aad\u5316\uff09 - \u306f\u307e\u3084\u3093\u306f\u307e\u3084\u3093\u306f\u307e\u3084\u3093\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","image_url":null,"author_name":"hamayanhamayan","published":"2021-12-18 13:24:20","width":"100%","author_url":"https://blog.hatena.ne.jp/hamayanhamayan/","type":"rich","blog_title":"\u306f\u307e\u3084\u3093\u306f\u307e\u3084\u3093\u306f\u307e\u3084\u3093","url":"https://blog.hamayanhamayan.com/entry/2021/12/18/132420"}