{"id":43381,"date":"2023-03-13T21:31:08","date_gmt":"2023-03-13T12:31:08","guid":{"rendered":"https:\/\/kinsta.com\/jp\/?p=43381&#038;preview=true&#038;preview_id=43381"},"modified":"2023-08-29T08:04:05","modified_gmt":"2023-08-28T23:04:05","slug":"csrf-attack","status":"publish","type":"post","link":"https:\/\/kinsta.com\/jp\/blog\/csrf-attack\/","title":{"rendered":"CSRF\u653b\u6483\u306e\u4ed5\u7d44\u307f\u3068\u5bfe\u7b56"},"content":{"rendered":"<p>\u8106\u5f31\u6027\u304c\u8513\u5ef6\u3057\u3001\u7d76\u3048\u305a\u5897\u3048\u7d9a\u3051\u308b\u4eca\u65e5\u3001\u30e6\u30fc\u30b6\u30fc\u306e\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u3068\u30d7\u30e9\u30a4\u30d0\u30b7\u30fc\u306e\u4fdd\u8b77\u306f\u3001\u3053\u308c\u307e\u3067\u4ee5\u4e0a\u306b\u91cd\u8981\u8996\u3055\u308c\u3066\u3044\u307e\u3059\u3002\u8106\u5f31\u6027\u3092\u898b\u904e\u3054\u305b\u3070\u3001\u8a55\u4fa1\u304c\u5931\u589c\u3057\u305f\u308a\u3001\u9ad8\u984d\u306a\u5236\u88c1\u91d1\u3092\u79d1\u3055\u308c\u305f\u308a\u3001\u9867\u5ba2\u3084\u8a2a\u554f\u8005\u304b\u3089\u306e\u4fe1\u983c\u3092\u5931\u3063\u305f\u308a\u3059\u308b\u53ef\u80fd\u6027\u304c\u9ad8\u307e\u308a\u307e\u3059\u3002<\/p>\n<p>\u30a6\u30a7\u30d6\u30b5\u30a4\u30c8\u3084\u30a6\u30a7\u30d6\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306f\u3001\u5e38\u306b<a href=\"https:\/\/kinsta.com\/jp\/blog\/types-of-malware\/\">\u30de\u30eb\u30a6\u30a7\u30a2<\/a>\u3084\u30b9\u30d1\u30e0\u306a\u3069\u306e\u653b\u6483\u306e\u5371\u967a\u306b\u6652\u3055\u308c\u3066\u3044\u307e\u3059\u3002\u4eca\u56de\u306f\u3001\u305d\u3093\u306a\u653b\u6483\u306e1\u3064\u3067\u3042\u308bCSRF\uff08\u30af\u30ed\u30b9\u30b5\u30a4\u30c8\u30ea\u30af\u30a8\u30b9\u30c8\u30d5\u30a9\u30fc\u30b8\u30a7\u30ea\uff09\u306b\u7126\u70b9\u3092\u5f53\u3066\u307e\u3059\u3002CSRF\u653b\u6483\u306f\u3001\u6c17\u3065\u304b\u306a\u3044\u9593\u306b\u767a\u751f\u3059\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u3001\u7279\u306b\u554f\u984c\u8996\u3055\u308c\u3066\u3044\u307e\u3059\u3002\u307e\u305f\u60aa\u610f\u306e\u3042\u308b\u8981\u6c42\u306f\u6b63\u3057\u3044\u8981\u6c42\u3068\u533a\u5225\u304c\u96e3\u3057\u304f\u3001\u958b\u767a\u8005\u3084\u30b5\u30a4\u30c8\u904b\u55b6\u8005\u304c\u767a\u898b\u3057\u3065\u3089\u3044\u3068\u3044\u3046\u306e\u3082\u5384\u4ecb\u3067\u3059\u3002<\/p>\n<p>\u3053\u306e\u8a18\u4e8b\u3067\u3001CSRF\u653b\u6483\u306e\u6982\u8981\u3068\u4ed5\u7d44\u307f\u3001\u305d\u3057\u3066\u5bfe\u7b56\u306b\u3064\u3044\u3066\u5b66\u3073\u307e\u3057\u3087\u3046\u3002<\/p>\n<div><\/div><kinsta-auto-toc heading=\"Table of Contents\" exclude=\"last\" list-style=\"arrow\" selector=\"h2\" count-number=\"-1\"><\/kinsta-auto-toc>\n<p><strong>CSRF\u653b\u6483\u306b\u3064\u3044\u3066<a href=\"https:\/\/www.youtube.com\/watch?v=AwhklZLnIzQ\">\u52d5\u753b\u3067\u306e\u89e3\u8aac<\/a>\u3082\u3054\u7528\u610f\u3057\u3066\u3044\u307e\u3059\u3002<\/strong><\/p>\n<kinsta-video src=\"https:\/\/www.youtube.com\/watch?v=AwhklZLnIzQ\"><\/kinsta-video>\n<h2>CSRF\u653b\u6483\u3068\u306f<\/h2>\n<p>\u30af\u30ed\u30b9\u30b5\u30a4\u30c8\u30ea\u30af\u30a8\u30b9\u30c8\u30d5\u30a9\u30fc\u30b8\u30a7\u30ea\u306f\u3001\u7565\u3057\u3066CSRF\u3068\u547c\u3070\u308c\u3001\u8a8d\u8a3c\u3055\u308c\u305f\u30e6\u30fc\u30b6\u30fc\u3092\u9a19\u3057\u3001\u77e5\u3089\u306c\u9593\u306b\u60aa\u610f\u306e\u3042\u308b\u30ea\u30af\u30a8\u30b9\u30c8\u3092\u9001\u4fe1\u3057\u3066\u3001\u610f\u56f3\u3057\u306a\u3044\u51e6\u7406\u304c\u884c\u308f\u308c\u308b\u5b9f\u884c\u3055\u305b\u3089\u308c\u3066\u3057\u307e\u3046\u653b\u6483\u3067\u3059\u3002<\/p>\n<figure id=\"attachment_139875\" aria-describedby=\"caption-attachment-139875\" style=\"width: 3334px\" class=\"wp-caption alignnone\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-139875 size-full\" src=\"https:\/\/kinsta.com\/wp-content\/uploads\/2022\/11\/CSRF-Attack-Okta.png\" alt=\"CSRF\u653b\u6483\u306e\u4ed5\u7d44\u307f\uff08\u753b\u50cf\u51fa\u5178: Okta\uff09\" width=\"3334\" height=\"1879\"><figcaption id=\"caption-attachment-139875\" class=\"wp-caption-text\">CSRF\u653b\u6483\u306e\u4ed5\u7d44\u307f\uff08\u753b\u50cf\u51fa\u5178: <a href=\"https:\/\/www.okta.com\/identity-101\/csrf-attack\/\">Okta<\/a>\uff09<\/figcaption><\/figure>\n<p>\u901a\u5e38\u3001CSRF\u653b\u6483\u306f\u3001\u653b\u6483\u8005\u304c\u5fdc\u7b54\u3092\u53d7\u3051\u53d6\u3089\u306a\u3044\u305f\u3081\u3001\u72b6\u614b\u3092\u5909\u66f4\u3059\u308b\u30ea\u30af\u30a8\u30b9\u30c8\u3092\u5de5\u4f5c\u3057\u307e\u3059\u3002\u4f8b\u3048\u3070\u3001\u30ec\u30b3\u30fc\u30c9\u306e\u524a\u9664\u3001<a href=\"https:\/\/kinsta.com\/jp\/blog\/change-wordpress-password\/\">\u30d1\u30b9\u30ef\u30fc\u30c9\u306e\u5909\u66f4<\/a>\u3001\u5546\u54c1\u306e\u8cfc\u5165\u3001\u30e1\u30c3\u30bb\u30fc\u30b8\u306e\u9001\u4fe1\u306a\u3069\u304c\u305d\u306e\u4e00\u4f8b\u3067\u3059\u3002\u3053\u306e\u3088\u3046\u306a\u72b6\u614b\u5909\u66f4\u306f\u3001\u30e6\u30fc\u30b6\u30fc\u304c\u6c17\u3065\u304b\u306a\u3044\u9593\u306b\u5f15\u304d\u8d77\u3053\u3055\u308c\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<p>\u60aa\u610f\u306e\u3042\u308b\u30e6\u30fc\u30b6\u30fc\u306e\u307b\u3068\u3093\u3069\u306f\u3001\u30bd\u30fc\u30b7\u30e3\u30eb\u30a8\u30f3\u30b8\u30cb\u30a2\u30ea\u30f3\u30b0\u3092\u5229\u7528\u3057\u3001\u7591\u3044\u3092\u6301\u305f\u306a\u3044\u30e6\u30fc\u30b6\u30fc\u306b\u30c1\u30e3\u30c3\u30c8\u3084\u30e1\u30fc\u30eb\u3092\u901a\u3058\u3066\u30ea\u30f3\u30af\u3092\u9001\u4fe1\u3057\u307e\u3059\u3002<\/p>\n<p>\u305d\u3057\u3066\u3001\u30e6\u30fc\u30b6\u30fc\u304c\u305d\u306e\u30ea\u30f3\u30af\u3092\u30af\u30ea\u30c3\u30af\u3059\u308b\u3068\u3001\u8a2d\u5b9a\u3057\u305f\u30b3\u30de\u30f3\u30c9\u304c\u5b9f\u884c\u3055\u308c\u3066\u3057\u307e\u3046\u3068\u3044\u3046\u4ed5\u7d44\u307f\u3067\u3059\u3002<\/p>\n<p>\u4f8b\u3048\u3070\u3001\u3053\u308c\u306b\u3088\u3063\u3066\u30e6\u30fc\u30b6\u30fc\u306e\u30a2\u30ab\u30a6\u30f3\u30c8\u304b\u3089\u8cc7\u91d1\u3092\u79fb\u52d5\u3059\u308b\u3053\u3068\u3082\u3067\u304d\u3066\u3057\u307e\u3044\u307e\u3059\u3002\u3042\u308b\u3044\u306f\u3001\u30e6\u30fc\u30b6\u30fc\u306e\u30e1\u30fc\u30eb\u30a2\u30c9\u30ec\u30b9\u3092\u5909\u66f4\u3057\u3001\u30a2\u30ab\u30a6\u30f3\u30c8\u306b\u30a2\u30af\u30bb\u30b9\u3067\u304d\u306a\u3044\u72b6\u614b\u306b\u3059\u308b\u3053\u3068\u3082\u53ef\u80fd\u3067\u3059\u3002<\/p>\n<h2>CSRF\u653b\u6483\u306e\u4ed5\u7d44\u307f<\/h2>\n<p>CSRF\u653b\u6483\u306e\u6700\u521d\u306e\u3001\u305d\u3057\u3066\u809d\u3068\u306a\u308b\u30b9\u30c6\u30c3\u30d7\u306f\u3001\u30a2\u30ab\u30a6\u30f3\u30c8\u306b\u30ed\u30b0\u30a4\u30f3\u4e2d\u306e\u30e6\u30fc\u30b6\u30fc\u306b\u72b6\u614b\u5909\u66f4\u306e\u30ea\u30af\u30a8\u30b9\u30c8\u3092\u9001\u4fe1\u3055\u305b\u308b\u3053\u3068\u3067\u3059\u3002CSRF\u653b\u6483\u306f\u3001\u8a8d\u8a3c\u3055\u308c\u305f\u30e6\u30fc\u30b6\u30fc\u304c\u3001\u77e5\u3089\u305a\u77e5\u3089\u305a\u306e\u3046\u3061\u306b\u30b5\u30a4\u30c8\u3084\u30a6\u30a7\u30d6\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306b\u60aa\u610f\u306e\u3042\u308b\u8981\u6c42\u3092\u9001\u4fe1\u3059\u308b\u3088\u3046\u306b\u4ed5\u5411\u3051\u308b\u3053\u3068\u304c\u76ee\u7684\u3067\u3059\u3002\u3053\u306e\u30ea\u30af\u30a8\u30b9\u30c8\u306f\u3001Cookie\u3084<a href=\"https:\/\/kinsta.com\/jp\/blog\/what-is-a-url\/#query-strings-and-variables\">URL\u30d1\u30e9\u30e1\u30fc\u30bf<\/a>\u3001\u4e00\u898b\u6b63\u5e38\u306a\u30c7\u30fc\u30bf\u578b\u3067\u69cb\u6210\u3055\u308c\u3066\u3044\u308b\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<p>CSRF\u653b\u6483\u306e\u5b9f\u884c\u306b\u306f\u3001\u4ee5\u4e0b\u304c\u5fc5\u8981\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<ul>\n<li>\u30bb\u30c3\u30b7\u30e7\u30f3\u7ba1\u7406\u306bCookie\u3092\u4f7f\u7528\u3059\u308b\u30a2\u30d7\u30ea\u306b\u8a8d\u8a3c\u3055\u308c\u305f\u30e6\u30fc\u30b6\u30fc\u304c\u30ed\u30b0\u30a4\u30f3\u3057\u3066\u3044\u308b\u72b6\u614b<\/li>\n<li>\u72b6\u614b\u3092\u5909\u66f4\u3059\u308b\u507d\u9020\u30ea\u30af\u30a8\u30b9\u30c8\u306e\u4f5c\u6210<\/li>\n<li>\u30bf\u30fc\u30b2\u30c3\u30c8\u30b5\u30fc\u30d0\u30fc\u304c\u51e6\u7406\u3059\u308b\u6b63\u3057\u3044\u30ea\u30af\u30a8\u30b9\u30c8\u306b\u4e88\u6e2c\u4e0d\u53ef\u80fd\u306a\u30d1\u30e9\u30e1\u30fc\u30bf\u304c\u542b\u307e\u308c\u3066\u3044\u306a\u3044\u3053\u3068\uff08\u4f8b\u3048\u3070\u3001\u72b6\u614b\u5909\u66f4\u306e\u30ea\u30af\u30a8\u30b9\u30c8\u3092\u51e6\u7406\u3059\u308b\u969b\u306b\u691c\u8a3c\u306e\u305f\u3081\u306b\u30d1\u30b9\u30ef\u30fc\u30c9\u3092\u6c42\u3081\u306a\u3044\u3082\u306e\uff09<\/li>\n<\/ul>\n<p>CSRF\u653b\u6483\u306e\u6700\u3082\u4e00\u822c\u7684\u306a\u624b\u53e3\u306f\u3001\u9069\u5207\u306aSameSite Cookie\u30dd\u30ea\u30b7\u30fc\u306e\u306a\u3044\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3067Cookie\u3092\u4f7f\u7528\u3059\u308b\u3082\u306e\u3067\u3059\u3002<a href=\"https:\/\/kinsta.com\/jp\/blog\/cookieless-future\/\">\u30a6\u30a7\u30d6\u30d6\u30e9\u30a6\u30b6\u3067\u306f\u81ea\u52d5\u7684\u306bCookie\u3092\u4fdd\u5b58<\/a>\u3057\uff08\u591a\u304f\u306e\u5834\u5408\u306f\u533f\u540d\uff09\u3001\u30e6\u30fc\u30b6\u30fc\u304c\u30c9\u30e1\u30a4\u30f3\u306b\u9001\u4fe1\u3059\u308b\u3042\u3089\u3086\u308b\u8981\u6c42\u306b\u305d\u306e\u30c9\u30e1\u30a4\u30f3\u3067\u4f7f\u7528\u3055\u308c\u305fCookie\u3092\u4fdd\u5b58\u3057\u307e\u3059\u3002<\/p>\n<p>SameSite Cookie\u30dd\u30ea\u30b7\u30fc\u306f\u3001\u8907\u6570\u306e\u30b5\u30a4\u30c8\u306b\u307e\u305f\u304c\u308b\u30d6\u30e9\u30a6\u30b8\u30f3\u30b0\u30b3\u30f3\u30c6\u30ad\u30b9\u30c8\u3067\u3001\u30d6\u30e9\u30a6\u30b6\u304cCookie\u3092\u3069\u306e\u3088\u3046\u306b\u6271\u3046\u304b\u3092\u5b9a\u7fa9\u3059\u308b\u3082\u306e\u3067\u3059\u3002\u300cStrict\u300d\u8a2d\u5b9a\u3059\u308c\u3070\u3001Cookie\u304c\u8907\u6570\u306e\u30b5\u30a4\u30c8\u3067\u5171\u6709\u3055\u308c\u308b\u3053\u3068\u304c\u306a\u304f\u306a\u308a\u3001CSRF\u653b\u6483\u3092\u56de\u907f\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u300cNone\u300d\u306b\u8a2d\u5b9a\u3059\u308c\u3070\u3001Cookie\u306f\u5171\u6709\u3055\u308c\u308b\u305f\u3081\u3001\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306fCSRF\u653b\u6483\u306b\u5bfe\u3057\u3066\u8106\u5f31\u306a\u307e\u307e\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<p>\u30e6\u30fc\u30b6\u30fc\u304c\u6c17\u3065\u304b\u305a\u306b\u30d6\u30e9\u30a6\u30b6\u304b\u3089\u60aa\u610f\u306e\u3042\u308b\u30ea\u30af\u30a8\u30b9\u30c8\u3092\u9001\u4fe1\u3059\u308b\u3068\u3001\u4fdd\u5b58\u3055\u308c\u305fCookie\u306b\u3088\u3063\u3066\u3001\u30b5\u30fc\u30d0\u30fc\u304c\u6b63\u5f53\u306a\u30ea\u30af\u30a8\u30b9\u30c8\u3068\u3057\u3066\u8a8d\u8b58\u3057\u307e\u3059\u3002\u3053\u306e\u7d50\u679c\u3001\u30b5\u30fc\u30d0\u30fc\u304c\u30e6\u30fc\u30b6\u30fc\u306e\u30a2\u30ab\u30a6\u30f3\u30c8\u3084\u30bb\u30c3\u30b7\u30e7\u30f3\u72b6\u614b\u3092\u5909\u66f4\u3057\u305f\u308a\u3001\u8981\u6c42\u3055\u308c\u305f\u30c7\u30fc\u30bf\u3092\u8fd4\u3057\u305f\u308a\u306a\u3069\u3001\u30ea\u30af\u30a8\u30b9\u30c8\u306b\u5fdc\u7b54\u3057\u3066\u3057\u307e\u3044\u307e\u3059\u3002<\/p>\n<p>\u6b21\u306b\u3001CSRF\u306e\u653b\u6483\u7d4c\u8def\u3068\u3057\u3066\u3001GET\u30ea\u30af\u30a8\u30b9\u30c8\u3068POST\u30ea\u30af\u30a8\u30b9\u30c8\u306e2\u3064\u306e\u4f8b\u3092\u8a73\u3057\u304f\u898b\u3066\u307f\u307e\u3057\u3087\u3046\u3002<\/p>\n<h2>GET\u30ea\u30af\u30a8\u30b9\u30c8\u306e\u5834\u5408<\/h2>\n<p>\u307e\u305a\u3001\u9280\u884c\u306e\u30a6\u30a7\u30d6\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3067\u4f7f\u7528\u3055\u308c\u308b<a href=\"https:\/\/kinsta.com\/jp\/blog\/what-is-an-http-request\/#what-is-an-http-request-and-how-does-it-work\">GET\u30ea\u30af\u30a8\u30b9\u30c8<\/a>\u3068\u30cf\u30a4\u30d1\u30fc\u30ea\u30f3\u30af\u306e\u914d\u4fe1\u3092\u60aa\u7528\u3057\u305f\u653b\u6483\u3092\u898b\u3066\u3044\u304d\u307e\u3059\u3002<\/p>\n<p>\u4ee5\u4e0b\u306f\u3001\u304a\u91d1\u3092\u632f\u308a\u8fbc\u3080\u305f\u3081\u306eGET\u30ea\u30af\u30a8\u30b9\u30c8\u4f8b\u3067\u3059\u3002<\/p>\n<pre><code class=\"language-http\">GET https:\/\/xymbank.com\/online\/transfer?amount=1000&accountNumber=547895 HTTP\/1.1<\/code><\/pre>\n<p>\u3053\u306e\u6b63\u3057\u3044\u30ea\u30af\u30a8\u30b9\u30c8\u306f\u3001\u8cfc\u5165\u3057\u305f\u5546\u54c1\u306e\u652f\u6255\u3044\u3068\u3057\u3066\u3001<code>547895<\/code>\u306e\u53e3\u5ea7\u306b1,000\u30c9\u30eb\u3092\u9001\u91d1\u3059\u308b\u3082\u306e\u3067\u3059\u3002<\/p>\n<p>\u3053\u306e\u3088\u3046\u306a\u8981\u6c42\u306f\u660e\u793a\u7684\u3067\u3001\u30b7\u30f3\u30d7\u30eb\u304b\u3064\u5b9f\u7528\u7684\u3067\u3059\u304c\u3001\u60aa\u610f\u306e\u3042\u308b\u30e6\u30fc\u30b6\u30fc\u304c\u77e5\u3089\u306a\u3044\u3088\u3046\u306a\u60c5\u5831\u304c\u542b\u307e\u308c\u3066\u304a\u3089\u305a\u3001\u30a2\u30ab\u30a6\u30f3\u30c8\u4fdd\u6301\u8005\u304cCSRF\u653b\u6483\u306b\u6652\u3055\u308c\u308b\u3053\u3068\u306b\u306a\u308a\u307e\u3059\u3002\u3064\u307e\u308a\u3001\u3053\u306e\u30ea\u30af\u30a8\u30b9\u30c8\u306e\u30d1\u30e9\u30e1\u30fc\u30bf\uff08\u91d1\u984d\u3068\u53e3\u5ea7\u756a\u53f7\uff09\u3092\u5909\u66f4\u3059\u308b\u3060\u3051\u3067\u3001\u7c21\u5358\u306b\u5b9f\u884c\u53ef\u80fd\u306a\u507d\u9020\u30ea\u30af\u30a8\u30b9\u30c8\u3092\u4f5c\u6210\u3067\u304d\u3066\u3057\u307e\u3044\u307e\u3059\u3002<\/p>\n<p>\u307e\u305f\u3001\u507d\u9020\u30ea\u30af\u30a8\u30b9\u30c8\u306f\u3001Cookie\u3067\u7ba1\u7406\u3055\u308c\u305f\u30bb\u30c3\u30b7\u30e7\u30f3\u304c\u7d99\u7d9a\u3057\u3066\u3044\u308b\u9650\u308a\u3001\u9280\u884c\u306e\u3069\u306e\u30e6\u30fc\u30b6\u30fc\u306b\u5bfe\u3057\u3066\u3082\u6709\u52b9\u3067\u3059\u3002<\/p>\n<p>\u653b\u6483\u8005\u306e\u30a2\u30ab\u30a6\u30f3\u30c8\uff08\u3053\u306e\u4f8b\u3067\u306f\u53e3\u5ea7\u756a\u53f7<code>654585<\/code>\uff09\u306b500\u30c9\u30eb\u3092\u9001\u91d1\u3059\u308b\u305f\u3081\u306e\u507d\u9020\u30ea\u30af\u30a8\u30b9\u30c8\u306f\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002\u306a\u304a\u3001\u3053\u306e\u4f8b\u306f\u9ad8\u5ea6\u306aCSRF\u653b\u6483\u306e\u4ed5\u7d44\u307f\u3092\u8aac\u660e\u3059\u308b\u305f\u3081\u306b\u7c21\u7565\u5316\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n<pre><code class=\"language-http\">GET https:\/\/xymbank.com\/online\/transfer?amount=500&accountNumber=654585 HTTP\/1.1<\/code><\/pre>\n<p>\u507d\u9020\u30ea\u30af\u30a8\u30b9\u30c8\u3092\u4f5c\u6210\u3057\u305f\u5f8c\u306f\u3001\u30e6\u30fc\u30b6\u30fc\u3092\u9a19\u3057\u3066\u3001\u9280\u884c\u306e\u30a2\u30d7\u30ea\u306b\u30ed\u30b0\u30a4\u30f3\u3057\u305f\u72b6\u614b\u3067\u3053\u306e\u8981\u6c42\u3092\u9001\u4fe1\u3055\u305b\u308b\u65b9\u6cd5\u3092\u8003\u3048\u307e\u3059\u3002\u4f8b\u3048\u3070\u3001\u30e6\u30fc\u30b6\u30fc\u306e\u6ce8\u610f\u3092\u5f15\u304f\u3088\u3046\u306a\u7121\u5bb3\u306a\u30cf\u30a4\u30d1\u30fc\u30ea\u30f3\u30af\u3092\u4f5c\u6210\u3057\u3066\u9001\u4fe1\u3059\u308b\u306e\u306f\u3088\u304f\u3042\u308b\u624b\u6cd5\u3067\u3059\u3002<\/p>\n<pre><code class=\"language-http\">&lt;a\nhref=\"https:\/\/xymbank.com\/online\/transfer?amount=500&accountNumber=654585\"&gt;Click here to get more information&lt;\/a&gt;.<\/code><\/pre>\n<p>\u653b\u6483\u8005\u304c\u6a19\u7684\u3068\u306a\u308b\u30e6\u30fc\u30b6\u30fc\u306e<a href=\"https:\/\/kinsta.com\/jp\/blog\/find-email-address\/\">\u30e1\u30fc\u30eb\u30a2\u30c9\u30ec\u30b9<\/a>\u3092\u7279\u5b9a\u3059\u308c\u3070\u3001\u591a\u304f\u306e\u9280\u884c\u306e\u9867\u5ba2\u306b\u30e1\u30fc\u30eb\u3067\u3053\u308c\u3092\u9001\u4fe1\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u305d\u3057\u3066\u3001\u30ed\u30b0\u30a4\u30f3\u72b6\u614b\u3067\u3053\u306e\u30ea\u30f3\u30af\u3092\u30af\u30ea\u30c3\u30af\u3057\u3066\u3057\u307e\u3046\u3068\u3001\u30ed\u30b0\u30a4\u30f3\u3057\u3066\u3044\u308b\u30a2\u30ab\u30a6\u30f3\u30c8\u304b\u3089\u653b\u6483\u8005\u306b500\u30c9\u30eb\u3092\u9001\u308b\u8981\u6c42\u304c\u8a98\u767a\u3055\u308c\u307e\u3059\u3002<\/p>\n<h2>POST\u30ea\u30af\u30a8\u30b9\u30c8\u306e\u5834\u5408<\/h2>\n<p>\u3067\u306f\u3001\u540c\u3058\u9280\u884c\u306e\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u304c<a href=\"https:\/\/kinsta.com\/jp\/blog\/what-is-an-http-request\/#what-is-an-http-request-and-how-does-it-work\">POST\u30ea\u30af\u30a8\u30b9\u30c8<\/a>\u306e\u307f\u3092\u53d7\u3051\u4ed8\u3051\u3066\u3044\u308b\u5834\u5408\u306f\u3069\u3046\u3067\u3057\u3087\u3046\u304b\u3002\u3053\u306e\u5834\u5408\u306f\u3001\u4e0a\u306e\u4f8b\u3067\u793a\u3057\u305f\u30cf\u30a4\u30d1\u30fc\u30ea\u30f3\u30af\u306e\u914d\u4fe1\u306f\u901a\u7528\u3057\u307e\u305b\u3093\u3002\u305d\u306e\u305f\u3081\u3001\u60aa\u610f\u3042\u308b\u30e6\u30fc\u30b6\u30fc\u306fHTML\u30d5\u30a9\u30fc\u30e0\u3092\u4f5c\u6210\u3057\u307e\u3059\u3002\u4ee5\u4e0b\u306f\u3001\u8cfc\u5165\u3057\u305f\u5546\u54c1\u306b\u5bfe\u3057\u30661,000\u30c9\u30eb\u3092\u9001\u4fe1\u3059\u308b\u30ea\u30af\u30a8\u30b9\u30c8\u306e\u4f8b\u3067\u3059\u3002<\/p>\n<pre><code class=\"language-http\">POST \/online\/transfer HTTP\/1.1\nHost: xymbank.com\nContent-Type: application\/x-www-form-urlencoded\nCookie: session=FRyhityeQkAPzeQ5gHgTvlyxHJYhg\namount=1000\naccount=547895<\/code><\/pre>\n<p>\u4e0a\u8a18\u306e\u30ea\u30af\u30a8\u30b9\u30c8\u306f\u3001\u30e6\u30fc\u30b6\u30fcID\u3001\u9001\u91d1\u984d\u3001\u9001\u91d1\u5148\u306e\u30a2\u30ab\u30a6\u30f3\u30c8\u3092\u5b9a\u7fa9\u3059\u308b\u305f\u3081\u306bCookie\u304c\u5fc5\u8981\u306b\u306a\u308a\u307e\u3059\u3002\u653b\u6483\u8005\u306f\u3053\u306e\u30ea\u30af\u30a8\u30b9\u30c8\u3092\u6539\u5909\u3057\u3066\u3001CSRF\u653b\u6483\u3092\u4ed5\u639b\u3051\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<p>\u64cd\u4f5c\u306f\u3001\u30b5\u30fc\u30d0\u30fc\u306b\u8ee2\u9001\u3092\u51e6\u7406\u3055\u305b\u308b\u305f\u3081\u306b\u507d\u9020\u30ea\u30af\u30a8\u30b9\u30c8\u306bCookie\u3092\u4ed8\u4e0e\u3059\u308b\u3060\u3051\u3002\u3053\u308c\u306b\u306f\u3001\u7121\u5bb3\u306b\u898b\u3048\u308b\u30cf\u30a4\u30d1\u30fc\u30ea\u30f3\u30af\u3092\u4f5c\u6210\u3057\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u30c8\u30ea\u30ac\u30fc\u3068\u306a\u308b\u30da\u30fc\u30b8\u306b\u30e6\u30fc\u30b6\u30fc\u3092\u8a98\u5c0e\u3057\u307e\u3059\u3002<\/p>\n<pre><code class=\"language-http\">&lt;html&gt;\n&lt;body&gt;\n&lt;form action=\"https:\/\/xymbank.com\/online\/transfer\" method=\"POST\"&gt;\n&lt;input type=\"hidden\" name=\"amount\" value=\"500\"\/&gt;\n&lt;input type=\"hidden\" name=\"account\" value=\"654585\" \/&gt;\n&lt;\/form&gt;\n&lt;script&gt;\ndocument.forms[0].submit();\n&lt;\/script&gt;\n&lt;\/body&gt;\n&lt;\/html&gt;<\/code><\/pre>\n<p>\u4e0a\u8a18\u306e\u30d5\u30a9\u30fc\u30e0\u306b\u306f\u3001\u91d1\u984d\u3068\u53e3\u5ea7\u756a\u53f7\u306e\u30d1\u30e9\u30e1\u30fc\u30bf\u304c\u3059\u3067\u306b\u8a2d\u5b9a\u3055\u308c\u3066\u304a\u308a\u3001\u8a8d\u8a3c\u3055\u308c\u305f\u30e6\u30fc\u30b6\u30fc\u304c\u3053\u306e\u30da\u30fc\u30b8\u306b\u30a2\u30af\u30bb\u30b9\u3059\u308b\u3068\u3001\u30d6\u30e9\u30a6\u30b6\u304c\u8981\u6c42\u3092\u30b5\u30fc\u30d0\u30fc\u306b\u8ee2\u9001\u3059\u308b\u524d\u306b\u30bb\u30c3\u30b7\u30e7\u30f3Cookie\u3092\u4ed8\u4e0e\u3057\u307e\u3059\u3002\u3053\u308c\u3067\u3001\u30b5\u30fc\u30d0\u30fc\u306f\u653b\u6483\u8005\u306e\u30a2\u30ab\u30a6\u30f3\u30c8\u306b500\u30c9\u30eb\u3092\u8ee2\u9001\u3057\u307e\u3059\u3002<\/p>\n<h2>3\u3064\u306eCSRF\u5bfe\u7b56<\/h2>\n<p>\u30a6\u30a7\u30d6\u30b5\u30a4\u30c8\u3084\u30a6\u30a7\u30d6\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3067CSRF\u653b\u6483\u3092\u56de\u907f\u3057\u3001\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u3092\u6700\u5927\u9650\u306b\u9ad8\u3081\u308b\u306b\u306f\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u5bfe\u7b56\u304c\u6709\u52b9\u3067\u3059\u3002<\/p>\n<ul>\n<li>CSRF\u30c8\u30fc\u30af\u30f3\u306e\u4f7f\u7528<\/li>\n<li>Referer\u30d8\u30c3\u30c0\u30fc\u306e\u691c\u8a3c<\/li>\n<li>Kinsta\u306a\u3069\u306e\u5b89\u5168\u306a\u30b5\u30fc\u30d0\u30fc\u30b5\u30fc\u30d3\u30b9\u306e\u5229\u7528<\/li>\n<\/ul>\n<h2>CSRF\u30c8\u30fc\u30af\u30f3\u306e\u4f7f\u7528<\/h2>\n<p>CSRF\u306b\u5bfe\u3057\u3066\u5b89\u5168\u306a\u30a6\u30a7\u30d6\u30b5\u30a4\u30c8\u306f\u3001\u5404\u30bb\u30c3\u30b7\u30e7\u30f3\u306b\u56fa\u6709\u306e\u30c8\u30fc\u30af\u30f3\u3092\u5272\u308a\u5f53\u3066\u3001\u30b5\u30fc\u30d0\u30fc\u5074\u3068<a href=\"https:\/\/kinsta.com\/jp\/browser-market-share\/\">\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u306e\u30d6\u30e9\u30a6\u30b6<\/a>\u3067\u5171\u6709\u3057\u307e\u3059\u3002\u30d6\u30e9\u30a6\u30b6\u304c\u6a5f\u5bc6\u6027\u306e\u9ad8\u3044\u30ea\u30af\u30a8\u30b9\u30c8\u3092\u9001\u4fe1\u3059\u308b\u5834\u5408\u3001\u30b5\u30fc\u30d0\u30fc\u306f\u305d\u306e\u30ea\u30af\u30a8\u30b9\u30c8\u306b\u5272\u308a\u5f53\u3066\u3089\u308c\u305f\u30c8\u30fc\u30af\u30f3\u3092\u6c42\u3081\u307e\u3059\u3002\u7570\u306a\u308b\u30c8\u30fc\u30af\u30f3\u304c\u542b\u307e\u308c\u3066\u3044\u308b\u5834\u5408\u306f\u3001\u51e6\u7406\u304c\u62d2\u5426\u3055\u308c\u307e\u3059\u3002\u307e\u305fCSRF\u30c8\u30fc\u30af\u30f3\u306f\u3001\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u306e\u89b3\u70b9\u304b\u3089\u3001\u30d6\u30e9\u30a6\u30b6\u306e\u30bb\u30c3\u30b7\u30e7\u30f3Cookie\u306b\u306f\u4fdd\u5b58\u3055\u308c\u307e\u305b\u3093\u3002<\/p>\n<h3>CSRF\u30c8\u30fc\u30af\u30f3\u306e\u6f5c\u5728\u7684\u306a\u8106\u5f31\u6027<\/h3>\n<p>CSRF\u30c8\u30fc\u30af\u30f3\u306f\u3001\u512a\u308c\u305f\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u5f37\u5316\u7b56\u3068\u306a\u308a\u307e\u3059\u304c\u3001\u653b\u6483\u3092\u5b8c\u5168\u306b\u9632\u3052\u308b\u3082\u306e\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002\u3053\u306e\u65b9\u6cd5\u306b\u306f\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u61f8\u5ff5\u70b9\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<ul>\n<li><b>\u691c\u8a3c\u306e\u30d0\u30a4\u30d1\u30b9<\/b>\u2500\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306b\u3088\u3063\u3066\u306f\u3001\u30c8\u30fc\u30af\u30f3\u304c\u898b\u3064\u304b\u3089\u306a\u3044\u5834\u5408\u3001\u691c\u8a3c\u3092\u30b9\u30ad\u30c3\u30d7\u3059\u308b\u3082\u306e\u304c\u3042\u308a\u307e\u3059\u3002\u3053\u308c\u306b\u3088\u3063\u3066\u3001\u60aa\u610f\u306e\u3042\u308b\u30e6\u30fc\u30b6\u30fc\u304c\u30c8\u30fc\u30af\u30f3\u3092\u542b\u3080\u30b3\u30fc\u30c9\u306b\u30a2\u30af\u30bb\u30b9\u3057\u305f\u5834\u5408\u3001\u30c8\u30fc\u30af\u30f3\u3092\u524a\u9664\u3057CSRF\u653b\u6483\u3092\u4ed5\u639b\u3051\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u3064\u307e\u308a\u3001\u30b5\u30fc\u30d0\u30fc\u3078\u306e\u6709\u52b9\u306a\u30ea\u30af\u30a8\u30b9\u30c8\u304c\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u3082\u306e\u3060\u3068\u3057\u307e\u3059\u3002<\/li>\n<\/ul>\n<pre><code class=\"language-http\">POST \/change_password\nPOST body:\npassword=pass123&csrf_token=93j9d8eckke20d433<\/code><\/pre>\n<p>\u3064\u307e\u308a\u3001\u30c8\u30fc\u30af\u30f3\u524a\u9664\u3057\u3066\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u9001\u4fe1\u3059\u308b\u3060\u3051\u3067\u3001\u653b\u6483\u3092\u884c\u3048\u308b\u3068\u3044\u3046\u3053\u3068\u3067\u3059\u3002<\/p>\n<pre><code class=\"language-http\">POST \/change_password\nPOST body:\npassword=pass123<\/code><\/pre>\n<ul>\n<li><b>\u30d7\u30fc\u30eb\u3055\u308c\u305f\u30c8\u30fc\u30af\u30f3<\/b>\u2500\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306b\u3088\u3063\u3066\u306f\u3001\u30bb\u30c3\u30b7\u30e7\u30f3\u306b\u4e00\u610f\u306e\u30c8\u30fc\u30af\u30f3\u3092\u5b9f\u88c5\u3059\u308b\u4ee3\u308f\u308a\u306b\u3001\u30e6\u30fc\u30b6\u30fc\u30bb\u30c3\u30b7\u30e7\u30f3\u306e\u691c\u8a3c\u306b\u30c8\u30fc\u30af\u30f3\u306e\u30d7\u30fc\u30eb\u3092\u7dad\u6301\u3059\u308b\u3082\u306e\u304c\u3042\u308a\u307e\u3059\u3002\u3053\u308c\u306b\u3088\u3063\u3066\u3001\u653b\u6483\u8005\u306f\u30c8\u30fc\u30af\u30f3\u306e\u30d7\u30fc\u30eb\u304b\u30891\u3064\u3092\u53d6\u5f97\u3059\u308b\u3060\u3051\u3067\u3001\u30e6\u30fc\u30b6\u30fc\u306b\u306a\u308a\u3059\u307e\u3059\u3053\u3068\u304c\u53ef\u80fd\u3067\u3059\u3002<\/li>\n<\/ul>\n<p>\u305d\u306e\u5f8c\u3001\u81ea\u5206\u306e\u30a2\u30ab\u30a6\u30f3\u30c8\u3092\u4f7f\u3063\u3066\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306b\u30ed\u30b0\u30a4\u30f3\u3057\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u30c8\u30fc\u30af\u30f3\u3092\u53d6\u5f97\u3057\u307e\u3059\u3002<\/p>\n<pre><code class=\"language-http\">[application_url].com?csrf_token=93j9d8eckke20d433<\/code><\/pre>\n<p>\u307e\u305f\u3001\u30c8\u30fc\u30af\u30f3\u306f\u30d7\u30fc\u30eb\u3055\u308c\u3066\u3044\u308b\u305f\u3081\u3001\u653b\u6483\u8005\u306f\u540c\u3058\u30c8\u30fc\u30af\u30f3\u3092\u30b3\u30d4\u30fc\u3057\u3001\u5225\u306e\u30e6\u30fc\u30b6\u30fc\u30a2\u30ab\u30a6\u30f3\u30c8\u306b\u30ed\u30b0\u30a4\u30f3\u3059\u308b\u305f\u3081\u306b\u3001\u518d\u5229\u7528\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<ul>\n<li><b>CSRF\u306f\u30c8\u30fc\u30af\u30f3\u3092Cookie\u306b\u30b3\u30d4\u30fc\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u308b<\/b>\u2500\u307e\u305f\u3001\u30c8\u30fc\u30af\u30f3\u306b\u95a2\u9023\u3059\u308b\u30d1\u30e9\u30e1\u30fc\u30bf\u3092\u30e6\u30fc\u30b6\u30fc\u306eCookie\u306b\u30b3\u30d4\u30fc\u3059\u308b\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3082\u3042\u308a\u307e\u3059\u3002\u653b\u6483\u8005\u304c\u305d\u306e\u3088\u3046\u306aCookie\u306b\u30a2\u30af\u30bb\u30b9\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u3066\u3057\u307e\u3048\u3070\u3001\u7c21\u5358\u306b\u5225\u306eCookie\u3092\u751f\u6210\u3057\u3001\u30d6\u30e9\u30a6\u30b6\u306b\u914d\u7f6e\u3057\u3066\u3001CSRF\u653b\u6483\u3092\u4ed5\u639b\u3051\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/li>\n<\/ul>\n<p>\u305d\u306e\u305f\u3081\u3001\u653b\u6483\u8005\u304c\u81ea\u5206\u306e\u30a2\u30ab\u30a6\u30f3\u30c8\u3092\u4f7f\u3063\u3066\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306b\u30ed\u30b0\u30a4\u30f3\u3057\u3001Cookie\u30d5\u30a1\u30a4\u30eb\u3092\u958b\u304f\u3068\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u8868\u793a\u3055\u308c\u307e\u3059\u3002<\/p>\n<pre><code class=\"language-http\">Csrf_token:93j9d8eckke20d433<\/code><\/pre>\n<p>\u3053\u306e\u60c5\u5831\u3092\u4f7f\u3048\u3070\u3001\u653b\u6483\u306b\u5fc5\u8981\u306a\u5225\u306eCookie\u3092\u4f5c\u6210\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<ul>\n<li><b>\u7121\u52b9\u306a\u30c8\u30fc\u30af\u30f3<\/b>\u2500\u4e2d\u306b\u306f\u3001CSRF\u30c8\u30fc\u30af\u30f3\u3092\u30e6\u30fc\u30b6\u30bb\u30c3\u30b7\u30e7\u30f3\u3068\u4e00\u81f4\u3055\u305b\u306a\u3044\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3082\u3002\u3053\u306e\u5834\u5408\u3001\u653b\u6483\u8005\u306f\u305f\u3060\u30bb\u30c3\u30b7\u30e7\u30f3\u306b\u30ed\u30b0\u30a4\u30f3\u3057\u3001\u4e0a\u8a18\u306e\u3088\u3046\u306a\u30c8\u30fc\u30af\u30f3\u3092\u53d6\u5f97\u3057\u3066\u3001\u6a19\u7684\u3068\u306a\u308b\u30e6\u30fc\u30b6\u30fc\u306bCSRF\u653b\u6483\u3092\u5b9f\u884c\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/li>\n<\/ul>\n<h2>Referer\u30d8\u30c3\u30c0\u30fc\u306e\u691c\u8a3c<\/h2>\n<p>\u3082\u30461\u3064\u306eCSRF\u5bfe\u7b56\u306f\u3001Referer\u30d8\u30c3\u30c0\u30fc\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u3067\u3059\u3002HTTP\u3067\u306f\u3001Referer\u30d8\u30c3\u30c0\u30fc\u306f\u30ea\u30af\u30a8\u30b9\u30c8\u306e\u9001\u4fe1\u5143\u3092\u793a\u3057\u3001<a href=\"https:\/\/kinsta.com\/jp\/blog\/google-analytics-spam\/\">\u5206\u6790<\/a>\u3001\u6700\u9069\u5316\u3001\u30ed\u30b0\u306a\u3069\u306b\u4f7f\u7528\u3055\u308c\u308b\u306e\u304c\u4e00\u822c\u7684\u3067\u3059\u3002<\/p>\n<p>CSRF\u653b\u6483\u3092\u9632\u6b62\u3059\u308b\u305f\u3081\u306b\u3001\u30b5\u30fc\u30d0\u30fc\u5074\u3067Referer\u30d8\u30c3\u30c0\u30fc\u306e\u30c1\u30a7\u30c3\u30af\u3092\u884c\u3046\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u30b5\u30fc\u30d0\u30fc\u5074\u3067\u30ea\u30af\u30a8\u30b9\u30c8\u306e\u30bd\u30fc\u30b9\u3092\u78ba\u8a8d\u3057\u3001\u30bf\u30fc\u30b2\u30c3\u30c8\u3092\u6c7a\u5b9a\u3057\u307e\u3059\u3002\u4e00\u81f4\u3059\u308b\u5834\u5408\u306b\u306f\u30ea\u30af\u30a8\u30b9\u30c8\u304c\u8a31\u53ef\u3055\u308c\u3001\u4e0d\u4e00\u81f4\u306e\u5834\u5408\u306f\u30b5\u30fc\u30d0\u30fc\u304c\u30ea\u30af\u30a8\u30b9\u30c8\u3092\u62d2\u5426\u3057\u307e\u3059\u3002<\/p>\n<p>Referer\u30d8\u30c3\u30c0\u30fc\u306f\u3001\u500b\u3005\u306e\u30e6\u30fc\u30b6\u30fc\u3092\u8b58\u5225\u3059\u308b\u5fc5\u8981\u304c\u306a\u3044\u305f\u3081\u3001\u30c8\u30fc\u30af\u30f3\u3088\u308a\u3082\u306f\u308b\u304b\u306b\u7c21\u5358\u306a\u5bfe\u7b56\u3067\u3059\u3002<\/p>\n<h3>Referer\u30d8\u30c3\u30c0\u30fc\u306e\u6f5c\u5728\u7684\u306a\u8106\u5f31\u6027<\/h3>\n<p>CSRF\u30c8\u30fc\u30af\u30f3\u540c\u69d8\u3001Referer\u30d8\u30c3\u30c0\u30fc\u306b\u3082\u3044\u304f\u3064\u304b\u898b\u9003\u305b\u306a\u3044\u91cd\u8981\u306a\u8106\u5f31\u6027\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<p>\u307e\u305a\u3001Referer\u30d8\u30c3\u30c0\u30fc\u306f\u5fc5\u9808\u3067\u306f\u306a\u304f\u3001\u30b5\u30a4\u30c8\u306b\u3088\u3063\u3066\u306fReferer\u30d8\u30c3\u30c0\u30fc\u306e\u306a\u3044\u30ea\u30af\u30a8\u30b9\u30c8\u3092\u9001\u4fe1\u3057\u3066\u304d\u307e\u3059\u3002CSRF\u304c\u30d8\u30c3\u30c0\u30fc\u306e\u306a\u3044\u30ea\u30af\u30a8\u30b9\u30c8\u3092\u51e6\u7406\u3059\u308b\u30dd\u30ea\u30b7\u30fc\u3092\u6301\u305f\u306a\u3044\u5834\u5408\u306f\u3001\u30d8\u30c3\u30c0\u30fc\u306e\u306a\u3044\u30ea\u30af\u30a8\u30b9\u30c8\u3067\u72b6\u614b\u5909\u66f4\u306e\u8981\u6c42\u3092\u4ed5\u5411\u3051\u308b\u3053\u3068\u304c\u3067\u304d\u3066\u3057\u307e\u3044\u307e\u3059\u3002<\/p>\n<p>\u3055\u3089\u306b\u3053\u306e\u5bfe\u7b56\u306f\u3001\u6700\u8fd1\u5c0e\u5165\u3055\u308c\u305f<a href=\"https:\/\/www.sjoerdlangkemper.nl\/2017\/06\/21\/bypass-csrf-check-using-referrer-policy\/\">Referrer-Policy<\/a>\u306b\u3088\u3063\u3066\u3001\u3042\u307e\u308a\u52b9\u679c\u7684\u3067\u306f\u306a\u304f\u306a\u3063\u3066\u304d\u3066\u3044\u307e\u3059\u3002\u3053\u306e\u30dd\u30ea\u30b7\u30fc\u306f\u3001\u4ed6\u30c9\u30e1\u30a4\u30f3\u3078\u306eURL\u6f0f\u6d29\u3092\u9632\u3050\u3082\u306e\u3067\u3001\u30e6\u30fc\u30b6\u30fc\u306fReferer\u30d8\u30c3\u30c0\u30fc\u306e\u60c5\u5831\u3092\u67d4\u8edf\u306b\u7ba1\u7406\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u3063\u3066\u3044\u307e\u3059\u3002\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u3001HTML\u30da\u30fc\u30b8\u306b\u30e1\u30bf\u30c7\u30fc\u30bf\u30bf\u30b0\u3092\u8cbc\u308a\u4ed8\u3051\u308b\u3053\u3068\u3067\u3001\u30d8\u30c3\u30c0\u30fc\u306e\u60c5\u5831\u306e\u4e00\u90e8\u3092\u516c\u958b\u3057\u305f\u308a\u3001\u9006\u306b\u975e\u516c\u958b\u306b\u3057\u305f\u308a\u3059\u308b\u3053\u3068\u304c\u53ef\u80fd\u3067\u3059\u3002<\/p>\n<pre><code class=\"language-http\">&lt;meta name=\"referrer\" content=\"no-referrer\"&gt;<\/code><\/pre>\n<p>\u3053\u306e\u30b3\u30fc\u30c9\u306f\u3001\u3053\u306e\u30da\u30fc\u30b8\u304b\u3089\u306e\u3059\u3079\u3066\u306e\u8981\u6c42\u306b\u5bfe\u3057\u3066\u3001Referer\u30d8\u30c3\u30c0\u30fc\u3092\u524a\u9664\u3059\u308b\u3082\u306e\u3067\u3059\u3002\u3053\u308c\u306b\u3088\u3063\u3066\u3001Referer\u30d8\u30c3\u30c0\u30fc\u306b\u4f9d\u5b58\u3059\u308b\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3067\u3001\u3053\u306e\u3088\u3046\u306a\u30da\u30fc\u30b8\u304b\u3089\u306eCSRF\u653b\u6483\u3092\u9632\u3050\u3053\u3068\u304c\u56f0\u96e3\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<h2>Kinsta\u306eCSRF\u5bfe\u7b56<\/h2>\n<p>\u30a6\u30a7\u30d6\u30b5\u30a4\u30c8\u3084\u30a6\u30a7\u30d6\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3092<a href=\"https:\/\/kinsta.com\/jp\/wordpress-hosting\/security\/\">Kinsta\u306e\u3088\u3046\u306a\u5b89\u5168\u306a\u30b5\u30fc\u30d0\u30fc\u30b5\u30fc\u30d3\u30b9<\/a>\u3067\u904b\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u60aa\u610f\u3042\u308b\u30e6\u30fc\u30b6\u30fc\u306b\u5bfe\u3057\u3066\u3001\u9ad8\u5ea6\u306a\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u5bfe\u7b56\u3092\u8b1b\u3058\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<p>Kinsta\u3067\u306f\u3001<a href=\"https:\/\/kinsta.com\/jp\/docs\/wordpress-hosting\/wordpress-backups\/#wordpress-backup\">\u81ea\u52d5\u30d0\u30c3\u30af\u30a2\u30c3\u30d7<\/a>\u3001<a href=\"https:\/\/kinsta.com\/jp\/docs\/user-settings\/logging-in\/#enable-twofactor-authentication-2fa\">\u4e8c\u8981\u7d20\u8a8d\u8a3c<\/a>\u3001<a href=\"https:\/\/kinsta.com\/jp\/blog\/ftp-vs-sftp\/#what-is-sftp\">SSH\u30d7\u30ed\u30c8\u30b3\u30eb\u306b\u3088\u308bSFTP<\/a>\u306a\u3069\u306e\u9ad8\u5ea6\u306a\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u6a5f\u80fd\u306b\u52a0\u3048\u3001<a href=\"https:\/\/kinsta.com\/jp\/cloudflare-integration\/\">Cloudflare\u7d71\u5408<\/a>\u306b\u3088\u308a\u3001IP\u30d9\u30fc\u30b9\u304a\u3088\u3073\u30d5\u30a1\u30a4\u30a2\u30a6\u30a9\u30fc\u30eb\u306b\u3088\u308b\u30a8\u30f3\u30bf\u30fc\u30d7\u30e9\u30a4\u30ba\u30ec\u30d9\u30eb\u306e\u4fdd\u8b77\u3092\u4fdd\u8a3c\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n<p>\u5177\u4f53\u7684\u306b\u306f\u3001\u60aa\u610f\u306e\u3042\u308b\u653b\u6483\u3092\u9632\u304e\u3001\u30d7\u30e9\u30b0\u30a4\u30f3\u3084\u30c6\u30fc\u30de\u306e\u6df1\u523b\u306a\u672a\u691c\u51fa\u306e\u8106\u5f31\u6027\u3078\u306e\u5bfe\u7b56\u3068\u3057\u3066\u3001CSRF\u8106\u5f31\u6027\u3092\u898b\u3064\u3051\u51fa\u3059\u7279\u5b9a\u306e\u3082\u306e\u3092\u542b\u3081\u3001\u7d0460\u306e\u72ec\u81ea\u30d5\u30a1\u30a4\u30a2\u30a6\u30a9\u30fc\u30eb\u30eb\u30fc\u30eb\u3092\u8a2d\u3051\u3066\u3044\u307e\u3059\u3002<\/p>\n<h2>\u307e\u3068\u3081<\/h2>\n<p>\u30af\u30ed\u30b9\u30b5\u30a4\u30c8\u30ea\u30af\u30a8\u30b9\u30c8\u30d5\u30a9\u30fc\u30b8\u30a7\u30ea\uff08CSRF\uff09\u306f\u3001\u8a8d\u8a3c\u3055\u308c\u305f\u30e6\u30fc\u30b6\u30fc\u3092\u9a19\u3057\u3066\u3001\u610f\u56f3\u3057\u306a\u3044\u72b6\u614b\u5909\u66f4\u306e\u8981\u6c42\u3092\u9001\u4fe1\u3055\u305b\u308b\u653b\u6483\u3067\u3059\u3002\u6b63\u3057\u3044\u72b6\u614b\u5909\u66f4\u306e\u30ea\u30af\u30a8\u30b9\u30c8\u3068\u507d\u9020\u30ea\u30af\u30a8\u30b9\u30c8\u306e\u533a\u5225\u304c\u3064\u304b\u306a\u3044\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u304c\u6a19\u7684\u306b\u306a\u3063\u3066\u3044\u307e\u3059\u3002<\/p>\n<p>CSRF\u306f\u3001\u30ed\u30b0\u30a4\u30f3\u3057\u305f\u30e6\u30fc\u30b6\u30fc\u3092\u8b58\u5225\u3059\u308b\u305f\u3081\u306b\u30bb\u30c3\u30b7\u30e7\u30f3Cookie\u306b\u4f9d\u5b58\u3057\u3001\u9069\u5207\u306aSameSite Cookie\u30dd\u30ea\u30b7\u30fc\u3092\u6301\u305f\u306a\u3044\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u307f\u306b\u4ed5\u639b\u3051\u308b\u3053\u3068\u304c\u3067\u304d\u308b\u653b\u6483\u3067\u3059\u3002\u307e\u305f\u3001\u30d1\u30b9\u30ef\u30fc\u30c9\u306a\u3069\u306e\u77e5\u308b\u3053\u3068\u304c\u3067\u304d\u306a\u3044\u30d1\u30e9\u30e1\u30fc\u30bf\u304c\u542b\u307e\u308c\u306a\u3044\u30ea\u30af\u30a8\u30b9\u30c8\u3092\u51e6\u7406\u3059\u308b\u30b5\u30fc\u30d0\u30fc\u3082\u5fc5\u8981\u6761\u4ef6\u306b\u306a\u308a\u307e\u3059\u3002\u305d\u3057\u3066\u3001GET\u307e\u305f\u306fPOST\u30ea\u30af\u30a8\u30b9\u30c8\u306e\u3044\u305a\u308c\u304b\u3092\u4f7f\u3063\u3066\u653b\u6483\u3092\u4ed5\u639b\u3051\u307e\u3059\u3002<\/p>\n<p>CSRF\u30c8\u30fc\u30af\u30f3\u306e\u4f7f\u7528\u3084Referer\u30d8\u30c3\u30c0\u30fc\u306e\u691c\u8a3c\u306f\u3001CSRF\u653b\u6483\u3092\u3042\u308b\u7a0b\u5ea6\u9632\u3050\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u304c\u3001\u3044\u305a\u308c\u306e\u5bfe\u7b56\u306b\u3082\u6f5c\u5728\u7684\u306a\u8106\u5f31\u6027\u304c\u3042\u308a\u3001\u5b8c\u74a7\u306a\u5bfe\u7b56\u3068\u306f\u8a00\u3048\u307e\u305b\u3093\u3002<\/p>\n<p><a href=\"https:\/\/kinsta.com\/jp\/wordpress-hosting\/migration\/\">Kinsta\u306e\u3088\u3046\u306a\u5b89\u5168\u6027\u306e\u9ad8\u3044\u30b5\u30fc\u30d0\u30fc\u30b5\u30fc\u30d3\u30b9\u306b\u79fb\u884c<\/a>\u3059\u308b\u3053\u3068\u3067\u3001CSRF\u653b\u6483\u304b\u3089\u30a6\u30a7\u30d6\u30b5\u30a4\u30c8\u3084\u30a6\u30a7\u30d6\u30a2\u30d7\u30ea\u3092\u4fdd\u8b77\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002Kinsta\u3067\u306f\u3001Cloudflare\u7d71\u5408\u306b\u3088\u308a\u3001\u7279\u5b9a\u306eCSRF\u653b\u6483\u3092\u56de\u907f\u3059\u308b\u3053\u3068\u3082\u53ef\u80fd\u3067\u3059\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u8106\u5f31\u6027\u304c\u8513\u5ef6\u3057\u3001\u7d76\u3048\u305a\u5897\u3048\u7d9a\u3051\u308b\u4eca\u65e5\u3001\u30e6\u30fc\u30b6\u30fc\u306e\u30bb\u30ad 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