{"id":167,"date":"2010-08-06T11:04:42","date_gmt":"2010-08-06T11:04:42","guid":{"rendered":""},"modified":"2011-04-25T07:10:39","modified_gmt":"2011-04-25T07:10:39","slug":"struts2%e5%92%8cwebwork%e8%bf%9c%e7%a8%8b%e5%91%bd%e4%bb%a4%e6%89%a7%e8%a1%8c%e6%bc%8f%e6%b4%9e%e5%88%86%e6%9e%90","status":"publish","type":"post","link":"https:\/\/www.inbreak.net\/archives\/167.html","title":{"rendered":"Struts2\u548cWebwork\u8fdc\u7a0b\u547d\u4ee4\u6267\u884c\u6f0f\u6d1e\u5206\u6790"},"content":{"rendered":"<p>&nbsp;<\/p>\n<p>\u4f5c\u8005: \u7a7a\u865a\u6d6a\u5b50\u5fc3, \u3000\u51fa\u5904:IT\u4e13\u5bb6\u7f51<\/p>\n<p>\u539f\u6587\u94fe\u63a5\uff1ahttp:\/\/security.ctocio.com.cn\/100\/11466600.shtml<\/p>\n<p>\u3000\u3000\u5728\u6f0f\u6d1e\u53d1\u73b0\u8005\u53d1\u5e03\u7684POC\u4e2d\uff0c\u5e76\u4e0d\u80fd\u5f71\u54cdxwork 2.1.2\u4e4b\u524d\u7684\u4e00\u4e9b\u7248\u672c(\u8fd9\u4e2a\u7248\u672c\u4e4b\u524d\u7684\u4e00\u4e9b\u7248\u672c\uff0c\u4e0b\u6587\u4f1a\u7edf\u79f0\u4e3a\u8001\u7248\u672c\uff0c\u4e4b\u540e\u7684\u53eb\u505a\u65b0\u7248)\uff0c\u4f8b\u5982struts 2.0.14(\u5c31\u662fstruts\u4fee\u8865\u4e86N\u4e2a\u9ad8\u5371\u6f0f\u6d1e\u540e\u7684\u7b2c\u4e00\u4e2a\u7248\u672c\uff0c\u6700\u5e38\u7528\u7684\u7248\u672c)\u5176\u5b9e\u662f\u4e0d\u80fd\u6253\u7684\uff0c\u672c\u6587\u4f1a\u5206\u6790\u8fd9\u4e2a\u6f0f\u6d1e\u7684\u8d77\u56e0\uff0c\u548c\u7ed3\u679c\uff0c\u4e5f\u4f1a\u7ed9\u51fa\u901a\u6740 POC\u7684\u601d\u8def\u3002<\/p>\n<p>\u3000\u3000\u672c\u6587\u5e0c\u671b\u770b\u61c2\u6587\u7ae0\u7684\u4eba\uff0c\u53ef\u4ee5\u4e13\u6ce8\u4e8e\u5206\u6790\u601d\u8def\uff0c\u4f46\u662f\u4e0d\u5e0c\u671b\u5927\u5bb6\u62ff\u7740POC\u5230\u5904\u641e\u7ad9\uff0c\u672c\u6587\u4e0d\u63d0\u4f9b\u4efb\u4f55\u9ed1\u5ba2\u5de5\u5177\uff0c\u6240\u6709\u7684POC\uff0c\u90fd\u662f\u5df2\u7ecf\u516c\u5e03\u8fc7\uff0c\u65e0\u6570\u4eba\u90fd\u77e5\u9053\u7684\u3002<\/p>\n<p>\u3000\u3000<strong>xwork\u4fee\u8865\u6f0f\u6d1e\u7684\u60b2\u5267(\u6f0f\u6d1e\u5386\u53f2)\uff1a<\/strong><\/p>\n<p>\u3000\u3000xwork\u4f5c\u4e3astruts2\u548cwebwork\u7684\u6838\u5fc3\u7ec4\u4ef6\uff0c\u66fe\u7ecf\u5728\u5df2\u7ecf\u4fee\u8865\u8fc7\u4e86&ldquo;xwork\u53c2\u6570\u62e6\u622a\u5668\u5141\u8bb8ognl\u65b9\u6cd5\u6267\u884c&rdquo;\u6f0f\u6d1e\uff0c\u5e76\u7ed9\u51fa\u4e86\u6f0f\u6d1e\u516c\u544a<\/p>\n<p>\u3000\u3000http:\/\/struts.apache.org\/2.x\/docs\/s2-003.html<\/p>\n<p>\u3000\u3000S2-003&nbsp;<\/p>\n<p><img decoding=\"async\" alt=\"\" src=\"http:\/\/inbreak.net\/attachments\/date_201008\/struts2\/1ZK5G3I77ZH1.jpg\" \/><\/p>\n<p>\u3000<strong>\u3000\u7b2c\u4e00\u6b21\u4fee\u8865<\/strong><\/p>\n<p>\u3000\u3000\u4f46\u662f\u8fd9\u4e2a\u4fee\u8865\uff0c\u6700\u7ec8\u7684\u7ed3\u679c\u662f\u4e2a\u60b2\u5267\u3002\u5927\u5bb6\u8fd8\u8bb0\u5f97\u6211\u4ee5\u524d\u8bf4\u8fc7\uff0c\u5728\u300aStruts2\u6846\u67b6\u5b89\u5168\u7f3a\u9677\u300b\u4e00\u6587\u4e2d\uff0c\u5b8c\u5168\u4e0d\u61c2web\u5b89\u5168\u7684\u5f00\u53d1\u4eba\u5458\uff0c\u4e3a\u4e86\u4fee\u8865 XSS\uff0c\u7adf\u7136\u4ec5\u4ec5\u9488\u5bf9POC\uff0c\u8fc7\u6ee4\u4e86\u8fd9\u6bb5\u5b57\u7b26&ldquo;\u3008script\u3009&rdquo;\uff0c\u4e00\u65e6\u7528\u6237\u63d0\u4ea4&ldquo;\u3008script xxx\u3009&rdquo;\u5c31\u7ed5\u8fc7\u7684\u50bbX\u4fee\u8865\u65b9\u5f0f\u3002<\/p>\n<p>\u3000\u3000\u4ed6\u4eec\u4fdd\u6301\u4e00\u8d2f\u7684\u98ce\u683c\uff0c\u5229\u7528\u6b63\u5219&ldquo;{\\\\p{Graph}&amp;&amp;[^,#:=]}*&rdquo;\u4fee\u8865\u6b64\u6f0f\u6d1e\u3002\u5e76\u4e14\u53c8\u4ec5\u4ec5\u9488\u5bf9\u653b\u51fb\u8005\u7ed9\u51fa\u7684POC\uff0c\u505a\u51fa\u4fee\u8865\uff0c\u4f7f\u7528POC\u6d4b\u8bd5\u901a\u8fc7\u5c31\u53d1\u5e03\u4e86\u3002<\/p>\n<p align=\"center\"><img decoding=\"async\" loading=\"lazy\" alt=\"\" width=\"500\" height=\"89\" src=\"http:\/\/inbreak.net\/attachments\/date_201008\/struts2\/9S4H150I7479_s.jpg\" \/><\/p>\n<p align=\"center\">&nbsp;<\/p>\n<p>\u3000\u3000\u89e3\u6790\u4e0bxwork\u5f00\u53d1\u4eba\u5458\u4f7f\u7528POC\u7684\u51e0\u4e2a\u60b2\u5267\u7684\u6d4b\u8bd5\u7528\u4f8b\u3002<\/p>\n<p>\u3000\u3000\u4e3a\u4e86\u8ba9ParametersInterceptor\u8ba4\u4e3a\u5b83\u662f\u4e2a\u5408\u6cd5ognl\u8bed\u53e5\uff0c\u53d8\u91cf\u4e2d\u5fc5\u987b\u6700\u7ec8\u5305\u542b#\u3002<\/p>\n<p align=\"center\"><img decoding=\"async\" loading=\"lazy\" alt=\"\" width=\"500\" height=\"62\" src=\"http:\/\/inbreak.net\/attachments\/date_201008\/struts2\/TRL4SLG6B813_s.jpg\" \/><\/p>\n<p>\u3000\u3000\u8fd9\u884c\u65e0\u6cd5\u901a\u8fc7\u9a8c\u8bc1\uff0cjava\u5728\u505a\u5b57\u7b26\u4e32\u8fd0\u7b97\u65f6\uff0c\\u0023\u4f1a\u88ab\u8f6c\u4e49\u4e3a#\u4e4b\u540e\uff0c\u624d\u4f1a\u505a\u5339\u914d\uff0c\u6240\u4ee5\u8fd4\u56defalse\u3002\u4e0b\u56fe\u53ef\u4ee5\u770b\u5230\uff0c\\u0023\u548c#\u662f\u5b8c\u5168\u76f8\u7b49\u7684\u3002<\/p>\n<p align=\"center\"><img decoding=\"async\" loading=\"lazy\" alt=\"\" width=\"359\" height=\"175\" src=\"http:\/\/inbreak.net\/attachments\/date_201008\/struts2\/E6M96738EY2G.jpg\" \/><\/p>\n<p>\u3000\u3000\u6240\u4ee5\u4fee\u8865\u6f0f\u6d1e\u7684\u5f00\u53d1\u4eba\u5458\uff0c\u81ea\u4f5c\u806a\u660e\uff0c\u76f4\u63a5\u7528\u6b63\u5219\u628a#\u5e72\u6389\u4e86\u3002<\/p>\n<p>\u3000\u3000\u653b\u51fb\u8005\u53d1\u6765\u7684\u867d\u7136\u662f\\u0023\uff0c\u4f46\u662f\u8fd9\u6bb5\u5b57\u7b26\u5728\u5185\u5b58\u4e2d\u505a\u5b57\u7b26\u4e32\u8fd0\u7b97\u65f6\uff0c\u4f1a\u5148\u53d8\u6210\\\\u0023\u7136\u540e\u624d\u505a\u8fd0\u7b97\u3002java\u5728\u5904\u7406\u7528\u6237\u63d0\u4ea4\u7684\u4e00\u6bb5 string\u5305\u542b\\\u65f6\uff0c\u4e3a\u4e86\u4fdd\u8bc1\u6570\u636e\u5b8c\u6574\u6027\uff0c\u4f1a\u81ea\u52a8\u591a\u52a0\u4e00\u4e2a\\\u7528\u505a\u8f6c\u4e49\uff0c\u6bd4\u5982\u7528\u6237\u63d0\u4ea4\u4e86\u6570\u636e&ldquo;\\n&rdquo;\uff0c\u5728\u5185\u5b58\u4e2d\u4f5c\u5b57\u7b26\u4e32\u8fd0\u7b97\u65f6\uff0c\u4e0d\u4f1a\u771f\u7684\u7528\u6362\u884c\u505a\u8fd0\u7b97\uff0c\u800c \u662f\u62ff&rdquo;\\\\n&rdquo;\u8fd9\u6bb5\u5b57\u7b26\u505a\u6bd4\u8f83\u3002\u90a3\u4e48\u7528\u6237\u63d0\u4ea4\u7684\\u0023\u88ab\u8f6c\u4e3a<a href=\"file:\/\/\/\">\\\\u0023<\/a>\uff0c\u5c31\u4f1a\u7ed5\u8fc7\u5bf9#\u7684\u68c0\u67e5\u3002<\/p>\n<p>\u3000\u3000\u8bc1\u636e\u5982\u56fe\uff1a<\/p>\n<p><img decoding=\"async\" loading=\"lazy\" style=\"text-align: center; margin: 0px auto; display: block\" alt=\"\" width=\"487\" height=\"108\" src=\"http:\/\/inbreak.net\/attachments\/date_201008\/struts2\/994P0QWDGBY1.jpg\" \/><\/p>\n<p align=\"center\"><img decoding=\"async\" loading=\"lazy\" alt=\"\" width=\"500\" height=\"33\" src=\"http:\/\/inbreak.net\/attachments\/date_201008\/struts2\/V8793BLQH721_s.jpg\" \/><\/p>\n<p>\u3000\u3000\u8fd9\u4e24\u4e2acase\u6ca1\u6709\u901a\u8fc7\u4ee3\u7801\u9a8c\u8bc1\u539f\u56e0\u540c\u4e0a\u3002<\/p>\n<p align=\"center\"><img decoding=\"async\" loading=\"lazy\" alt=\"\" width=\"500\" height=\"17\" src=\"http:\/\/inbreak.net\/attachments\/date_201008\/struts2\/QIE27ZV347MC_s.jpg\" \/><\/p>\n<p>\u3000\u3000\u60b2\u5267\u5c31\u5728\u8fd9\u91cc\uff0c\u8fd9\u91cc\u867d\u7136\u662f\\\\u0023\uff0c\u7b26\u5408\u7528\u6237\u63d0\u4ea4\u7684\u573a\u666f\uff0c\u60b2\u5267\u662f\u8fd9\u6bb5\u5b57\u7b26\u91cc\u9762\u56e0\u4e3a\u6709\u7a7a\u683c\uff0c\u5c31\u5728+\u4e24\u8fb9\uff0c\u6240\u4ee5\u65e0\u6cd5\u901a\u8fc7\uff0c\u800c\u653b\u51fb\u8005\u5982\u679c\u53bb\u6389\u7a7a\u683c\uff0c\u5c31\u901a\u8fc7\u4e86\u3002<\/p>\n<p>\u3000\u3000\u5b98\u65b9\u5c31\u8fd9\u6837\u53d1\u5e03\u4e86\uff0c\u5176\u5b9e\u53d1\u5e03\u7684\u662f\u4e2a\u6f0f\u6d1e\u7248\u3002<\/p>\n<p>\u3000\u3000\u8fd9\u662f\u7b2c\u4e00\u6b21\u4fee\u8865\uff0c\u8fd9\u6b21\u4fee\u8865\u5176\u5b9e\u662f\u5927\u5bb6\u90fd\u77e5\u9053\uff0c\u56e0\u4e3a\u53d1\u4e86\u516c\u544a\u51fa\u6765\uff0c\u5b98\u65b9\u867d\u7136\u516c\u544a\u8bf4\u662f\u9ad8\u5371\uff0c\u4f46\u662f\u5b98\u65b9\u53ea\u77e5\u9053\u653b\u51fb\u8005\u53ef\u4ee5\u901a\u8fc7ognl\u8868\u8fbe\u5f0f\u4fee\u6539 server\u7aef\u7684session\u7b49\u4fe1\u606f\u3002\u8fd9\u65f6\u5b98\u65b9\u8fd8\u6ca1\u6709\u610f\u8bc6\u5230\u8fd9\u5176\u5b9e\u662f\u4e2a\u8fdc\u7a0b\u4ee3\u7801\u6267\u884c\u6f0f\u6d1e\uff0cognl\u4e0d\u4ec5\u4ec5\u652f\u6301\u4fee\u6539\uff0c\u8fd8\u652f\u6301\u6267\u884c\u4e00\u4e9b\u9759\u6001\u65b9\u6cd5\uff0c\u6bd4\u5982 @Runtime@getRuntime().exec(&ldquo;calc&rdquo;)\u3002<\/p>\n<p>\u3000<strong>\u3000\u7b2c\u4e8c\u6b21\u4fee\u8865<\/strong><\/p>\n<p>\u3000\u3000\u76f4\u5230\u67d0\u5929\uff0c\u53ef\u80fd\u662f\u5728\u7248\u672cxwork2.1.2\u65f6\uff0c\u5b98\u65b9\u5077\u5077\u4fee\u6539\u5b89\u5168\u914d\u7f6e\uff0c\u9ed8\u8ba4\u8ba9SecurityMemberAccess(\u7ba1\u7406ognl\u6743\u9650\u7684 \u7c7b)\u7684allowStaticMethodAccess\u4e3afalse\uff0c\u8fd9\u5bfc\u81f4\u9759\u6001\u65b9\u6cd5\u4e0d\u80fd\u6267\u884c\uff0c\u5e76\u4e14\u4e0d\u77e5\u4ec0\u4e48\u539f\u56e0\uff0c\u5077\u5077\u4fee\u6539\u6b63\u5219\uff0c\u4e5f\u540c\u65f6\u653e\u5f00\u4e86\u5bf9\u53c2\u6570\u540d\u79f0 \u4e2d\u7a7a\u683c\u5b57\u7b26\u7684\u9650\u5236\u3002<\/p>\n<p>\u3000\u3000<strong>\u6f0f\u6d1e\u88ab\u7206<\/strong><\/p>\n<p>\u3000\u3000\u8fd9\u6b21\u51fa\u4e86\u8fdc\u7a0b\u4ee3\u7801\u6267\u884c(Struts2\/XWork &lt; 2.2.0 Remote Command Execution Vulnerability)\uff0c\u6f0f\u6d1e\u7684\u53d1\u73b0\u8005\u5c31\u662f\u770b\u5230\u4e86\\u0023\u7684\u9650\u5236\u5176\u5b9e\u65e0\u6548\uff0c\u7814\u7a76\u51fa\u4e86\u7ed5\u8fc7\u9ed8\u8ba4\u5b89\u5168\u914d\u7f6e\u7684\u65b9\u6cd5\uff0c\u5e76\u4e14\u5229\u7528ognl\u5141\u8bb8\u9759\u6001\u65b9\u6cd5\u6267 \u884c\uff0c\u8fbe\u5230\u4e86\u8fdc\u7a0b\u4ee3\u7801\u6267\u884c\u7684\u6548\u679c\u3002<\/p>\n<p>\u3000\u3000<strong>\u539f\u7406\u7b80\u4ecb\uff1a<\/strong><\/p>\n<p>\u3000\u30001\u3001 \u7528\u6237\u63d0\u4ea4\u4e86\\u0023\u88ab\u8f6c\u4e49\u4e3a\\\\u0023\uff0c\u901a\u8fc7\u4e86\u5bf9\u53c2\u6570\u540d\u79f0\u7684\u9a8c\u8bc1\u540e\uff0c\u6700\u7ec8ognl\u5904\u7406\u4e4b\u524d\uff0c\u53c8\u53d8\u6210\u4e86\\u0023\uff0c\u4e5f\u5c31\u662f#\uff0c\u7b26\u5408\u4e86ognl\u8bed\u6cd5\u3002<\/p>\n<p>\u3000\u30002\u3001 \u901a\u8fc7Ognl\u8bed\u53e5\u6267\u884c\uff0c\u53ef\u4ee5\u5728struts2\u548cwebwork\u8fd0\u884c\u8d77\u6765\u65f6\uff0c\u628aognl\u4e0a\u4e0b\u6587\u4e2d\u7684\u4e00\u4e9b\u9ed8\u8ba4\u914d\u7f6e\u8986\u76d6\u6389\uff0c\u6f0f\u6d1e\u53d1\u73b0\u8005\u7ed9\u51fa\u4e86\u4e0d\u5c11\u53ef\u4ee5\u8986\u76d6\u7684\u6570\u503c\u3002<\/p>\n<p>\u3000\u30003\u3001 \u867d\u7136\u9ed8\u8ba4\u914d\u7f6e\u662f\u7981\u6b62\u9759\u6001\u65b9\u6cd5\u6267\u884c\u7684\uff0c\u4f46\u662fxwork\u7684\u914d\u7f6e\uff0c\u5176\u5b9e\u662f\u53ef\u4ee5\u8986\u76d6\u7684\uff0c\u4e00\u65e6\u8986\u76d6\u6389&ldquo;\u7528\u4e8e\u7981\u6b62\u9759\u6001\u65b9\u6cd5\u6267\u884c&rdquo;\u7684value\uff0c\u5f53\u7136\u53c8\u53ef\u4ee5\u6267\u884c\u4e86\u3002<\/p>\n<p>\u3000\u30004\u3001 Runtime.getRuntime().exec()\u8fd9\u6bb5\uff0c\u5176\u5b9e\u53ef\u4ee5\u5f53\u505a\u9759\u6001\u65b9\u6cd5\u8c03\u7528\uff0c\u5bfc\u81f4\u6267\u884c\u7cfb\u7edf\u547d\u4ee4\u3002Ognl\u8bed\u53e5\u8c03\u7528\u9759\u6001\u65b9\u6cd5\uff1a@Runtime@getRuntime().exec(&ldquo;calc&rdquo;)\u3002<\/p>\n<p>\u3000\u3000\u6f0f\u6d1e\u53d1\u73b0\u8005\u7ed9\u51fa\u4e86shellcode\uff0c\u4f46\u662f\u7ecf\u8fc7\u6211\u7684\u6d4b\u8bd5\uff0cshellcode\u5e76\u4e0d\u80fd\u5f71\u54cd\u6240\u6709\u7248\u672c\uff0c\u800c\u662f\u4ec5\u4ec5\u9488\u5bf9xwork2.1.2\u53ca\u4ee5\u4e0a\u7684\u7248 \u672c\u6709\u6548\uff0cxwork2.1.2\u53ca\u4ee5\u4e0a\u6838\u5fc3\u88ab\u5e94\u7528\u5728struts2\u548cwebwork\u67d0\u4e9b\u7248\u672c\u4e2d\uff0c\u6240\u4ee5\u4ed6\u4eec\u95f4\u63a5\u53d7\u5230\u4e86\u5f71\u54cd\uff0c\u4f46\u662f\u4fee\u8865\u4ee3\u7801\uff0c\u662fxwork\u53bb\u505a \u7684\u3002<\/p>\n<p>\u3000\u3000<strong>\u6f0f\u6d1e\u53d1\u73b0\u8005\u7ed9\u51faPOC\uff1a<\/strong><\/p>\n<p align=\"center\"><img decoding=\"async\" loading=\"lazy\" alt=\"\" width=\"500\" height=\"70\" src=\"http:\/\/inbreak.net\/attachments\/date_201008\/struts2\/2JH7987U64WC_s.jpg\" \/><\/p>\n<p>\u3000\u3000<strong>\u5c71\u5be8\u7684\u4fee\u8865\u65b9\u5f0f\u5e26\u6765\u7684\u540e\u679c<\/strong><\/p>\n<p>\u3000\u3000\u6211\u770b\u5230\u5f88\u591a\u4eba\u5bf9\u8fd9\u4e2a\u6f0f\u6d1e\u7b80\u5355\u5206\u6790\u4e86\u4e0b\uff0c\u6709\u4e00\u5c0f\u64ae\u4e0d\u660e\u771f\u76f8\u7684\u7fa4\u4f17\u8ba4\u4e3a\uff0c\u8fd9\u662f\u56e0\u4e3a\u53c2\u6570\u540d\u79f0\\\\u0023\u5e26\u6765\u7684\u540e\u679c\uff0c\u5b98\u65b9\u81ea\u5df1\u4e0a\u6b21\u4fee\u8865\u7684\u4e0d\u5b8c\u5584\uff0c\u6240\u4ee5\uff0c\u53ef\u4ee5\u8fc7\u6ee4\\\\u0023\uff0c\u641e\u5b9a\u8fd9\u4ef6\u4e8b\u60c5\u3002<\/p>\n<p>\u3000\u3000\u5982\u56fe\u662f\u6211\u505a\u89c1\u8fc7\u7684&ldquo;\u5176\u4e2d\u4e00\u4e2a&rdquo;\u6f0f\u6d1e\u5206\u6790\u8005\uff0c\u81ea\u5df1\u641e\u7684\u5c71\u5be8\u8865\u4e01\uff0c\u539f\u7406\u5c31\u662f\u7981\u6b62\\\\u0023\uff1a<\/p>\n<p align=\"center\"><img decoding=\"async\" loading=\"lazy\" alt=\"\" width=\"388\" height=\"271\" src=\"http:\/\/inbreak.net\/attachments\/date_201008\/struts2\/9E2953F889YJ.jpg\" \/><\/p>\n<p>\u3000\u3000\u6458\u81ea\u4e92\u8054\u7f51\u67d0\u7bc7\u6587\u7ae0\uff0c\u4e0d\u70b9\u540d\u4e86\uff0c\u7b2c\u4e8c\u70b9\u89e3\u51b3\u65b9\u6848\u5c45\u7136\u4e0d\u7b26\u5408XML\u89c4\u5219-_-!\u3002<\/p>\n<p>\u3000\u3000\u8fd9\u53ea\u662f\u5176\u4e2d\u4e00\u79cd\u65b9\u6848\uff0c\u5f88\u591a\u4eba\u8bf4\u53ea\u8981\u7981\u6b62\\\\u0023\u5c31\u53ef\u4ee5\u4e86\uff0c\u4e0d\u5f97\u4e0d\u8bf4\uff0c\u8fd9\u4e2a\u4eba\u5e94\u8be5\u5206\u6790\u4e86\u6f0f\u6d1e\uff0c\u5e76\u4e14\u4e86\u89e3\u4e86\u539f\u7406\u3002\u4ed6\u77e5\u9053\u867d\u7136\u5b98\u65b9\u7684\u8865\u4e01\u51fa\u6765 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http:\/\/svn.apache.org\/viewvc\/struts\/struts2\/trunk\/xwork-core\/src\/main\/java\/com\/opensymphony\/xwork2\/interceptor\/ParametersInterceptor.java?view=markup&amp;pathrev=956389<\/p>\n<p>\u3000\u3000\u4e3a\u4e86\u4f18\u5148\u4fdd\u8bc1\u4e1a\u52a1\uff0c\u53ea\u8981\u7981\u6b62\u4e86\\\\u0023\u5c31\u53ef\u4ee5\u4fee\u8865\u6f0f\u6d1e\uff0c\u6240\u4ee5\u4ee5\u4e0a\u5c71\u5be8\u65b9\u6848\u8c8c\u4f3c\u662f\u53ef\u884c\u7684\uff0c\u5e76\u4e14\u7ecf\u8fc7\u6d4b\u8bd5POC\u6253\u4e0d\u4e86\u4e86\u3002<\/p>\n<p>\u3000\u3000\u6211\u4e5f\u770b\u5230\u4e86\u8fd9\u4e2a\u65b9\u6cd5\uff0c\u8fd9\u771f\u662f\u4e2a\u60b2\u5267\uff0c\u62e6\u622a\\u0023\u80fd\u89e3\u51b3\u95ee\u9898\u4e48\uff1f<\/p>\n<p>\u3000\u3000\u4e3a\u4ec0\u4e48\u6f0f\u6d1e\u53d1\u73b0\u8005\uff0c\u901a\u8fc7\\u0023\u7ed5\u8fc7\u4e86#\u9650\u5236\uff1f\u8fd8\u6709\u6ca1\u6709\u5176\u4ed6\u7f16\u7801\u53ef\u4ee5\u7ed5\u8fc7\uff1f<\/p>\n<p>\u3000\u3000\u7b54\u6848\u662f\uff0c\u8fd8\u6709\u5176\u4ed6\u7f16\u7801\u53ef\u4ee5\u7ed5\u8fc7\uff0c\u4ec5\u4ec5\u63a7\u5236\u4e86\\u0023\uff0c\u662f\u4e2a\u60b2\u5267\u3002\u7ecf\u8fc7\u6211\u5b9e\u9645\u6d4b\u8bd5\uff0c\u53d1\u73b0#\u53f7\u76848\u8fdb\u5236\u7f16\u7801\\43\uff0c\u4e5f\u662f\u5728\u8fd9\u91cc\u4f7f\u7528\u7684\uff0c\u5e76\u4e14\\043\u4e5f\u662f\u53ef\u4ee5\u7684\u3002\u4e8e\u662f\u6211\u7b11\u4e86\uff1a<\/p>\n<p align=\"center\"><img decoding=\"async\" loading=\"lazy\" alt=\"\" width=\"500\" height=\"139\" src=\"http:\/\/inbreak.net\/attachments\/date_201008\/struts2\/S9QQI320B312_s.jpg\" \/><\/p>\n<p>\u3000\u3000\u8fd9\u6bb5\u65b0\u7684POC\uff0c\u6ca1\u6709\u4efb\u4f55\u4e00\u4e2a\\u0023\uff0c\u5374\u4e00\u6837\u53ef\u4ee5\u6267\u884ccalc\uff0c\u7ecf\u8fc7\u5b9e\u9645\u6d4b\u8bd5\uff0c\u7ed5\u8fc7\u4e86\u6240\u6709\u4ec5\u4ec5\u8fc7\u6ee4\\u0023\u7684\u9632\u5fa1\u3002\u8ba9\u4ed6\u4eec\u6162\u6162\u4fee\u8865\u5427\uff0c\u6211\u4eec\u4e0d\u7740\u6025\uff0c\u7b49\u5927\u5bb6\u90fd\u6253\u4e0a\u4e86\u8fc7\u6ee4\\u0023\u7684\u8865\u4e01\uff0c\u518d\u628a\u8fd9\u4e2a\u65b0\u7684POC\u653e\u51fa\u6765\u3002<\/p>\n<p>\u3000\u3000\u6211\u770b\u5230neeao\u5c31\u5f88\u8c28\u614e\uff0c\u76f4\u63a5\u4e0a\u5b98\u65b9\u8865\u4e01\uff0c\u8fd9\u662f\u4ed6\u5bf9\u8fd9\u4e2a\u6f0f\u6d1e\u7684\u5206\u6790\uff1a<\/p>\n<p>\u3000\u3000http:\/\/neeao.com\/archives\/59\/<\/p>\n<p>\u3000<strong>\u3000\u8001\u7248\u672c\u7684struts\u548cwebwork\u7684POC\u4e0d\u901a\u7528\u95ee\u9898<\/strong><\/p>\n<p>\u3000\u3000\u5728\u63a8\u884c\u4fee\u8865\u65b9\u6848\u65f6\uff0c\u5f00\u53d1\u4eba\u5458\u603b\u662f\u4ece\u81ea\u5df1\u7684\u89d2\u5ea6\u548c\u7ecf\u9a8c\u4fee\u8865\u6f0f\u6d1e\uff0c\u4ed6\u4eec\u91c7\u7528\u8fc7\u6ee4\\u0023\u7684\u65b9\u6848\u4e5f\u7f62\u4e86\uff0c\u6700\u8d77\u7801\u6001\u5ea6\u7aef\u6b63\u3002\u4e0d\u50cf\u6709\u4e9b\u4e92\u8054\u7f51\u516c\u53f8\u7684\u5f00 \u53d1\u6839\u672c\u4e0d\u53bb\u8865\uff0c\u539f\u56e0\u5f88\u7b80\u5355\uff0c\u4ed6\u7528\u7684\u662f\u8001\u7248\u672c\u7684struts\u548cwebwork\u3002\u5bf9xwork2.1.2\u4ee5\u4e0b\u6838\u5fc3\u7684struts2\u548cwebwork\uff0cPOC\u6253 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align=\"center\"><img decoding=\"async\" loading=\"lazy\" alt=\"\" width=\"500\" height=\"47\" src=\"http:\/\/inbreak.net\/attachments\/date_201008\/struts2\/11KO119RNOY7_s.jpg\" \/><\/p>\n<p>\u3000\u3000\u5728\u9ad8\u7248\u672c\u7684struts\u4e2d\uff0callowStaticMethodAccess(\u5141\u8bb8\u9759\u6001\u65b9\u6cd5\u8bbf\u95ee\u8bbf\u95ee\uff0c\u505a\u6743\u9650\u5224\u65ad)\u9ed8\u8ba4\u662ffalse\u7684\u3002\u4f46\u662f\u4f4e\u7248\u672c\u7684\u672c\u6765\u5c31\u662ftrue\uff0c\u6240\u4ee5\u4f20\u4e0d\u4f20\u90fd\u4e00\u6837\uff0c\u53ef\u4ee5\u7701\u4e86\u3002<\/p>\n<p>\u3000\u30002\u3001\u7b2c\u4e8c\u4e2a\u53c2\u6570<\/p>\n<p align=\"center\"><img decoding=\"async\" loading=\"lazy\" alt=\"\" width=\"500\" height=\"77\" src=\"http:\/\/inbreak.net\/attachments\/date_201008\/struts2\/9RGF89Y1ZY54_s.jpg\" \/><\/p>\n<p>\u3000\u3000\u8fd9\u53e5\u5fc5\u987b\u5728\uff0c\u5426\u5219\u4e5f\u4e0d\u4f1a\u8c03\u7528\u9759\u6001\u65b9\u6cd5\u3002<\/p>\n<p>\u3000\u30003\u3001\u7b2c\u4e09\u4e2a\u53c2\u6570<\/p>\n<p align=\"center\"><img decoding=\"async\" loading=\"lazy\" alt=\"\" width=\"500\" height=\"67\" src=\"http:\/\/inbreak.net\/attachments\/date_201008\/struts2\/PYA49HDL444Q_s.jpg\" \/><\/p>\n<p>\u3000\u3000\u8fd9\u53e5\u662fshellcode\uff0c\u4e0d\u80fd\u6ca1\u6709\u3002<\/p>\n<p>\u3000\u3000\u5728\u8001\u7248\u672c\u4e2d\uff0c\u7b2c\u4e8c\u4e2a\u53c2\u6570\uff0c\u662f\u4e0d\u80fd\u8fd0\u884c\u7684\uff0c\u628a\u5b83\u5f04\u7684\u597d\u770b\u70b9\uff1a<\/p>\n<p align=\"center\"><img decoding=\"async\" loading=\"lazy\" alt=\"\" width=\"500\" height=\"54\" src=\"http:\/\/inbreak.net\/attachments\/date_201008\/struts2\/N15LKL1G2M07_s.jpg\" \/><\/p>\n<p>\u3000\u3000\u6ce8\u610f\uff0cnew\u540e\u9762\uff0c\u6709\u7a7a\u683c\uff0c\u5728ParametersInterceptor\u7684\u53c2\u6570\u6b63\u5219\u9a8c\u8bc1\u4e2d\uff0c\u6839\u672c\u8fc7\u4e0d\u53bb\u3002 \u65e2\u7136\u8001\u7248\u672c\u4e0d\u5141\u8bb8\u53c2\u6570\u4e2d\u51fa\u73b0\u7a7a\u683c\uff0c\u90a3\u4e48\u5982\u679c\u4f60\u7684shell\u91cc\u5982\u679c\u6709\u7a7a\u683c\uff0c\u4f1a\u901a\u8fc7\u4e48\uff1f\u563f\u563f\u3002\u3002\u3002\u53ea\u8981\u4f60\u7684shell\uff0c\u65e0\u6cd5\u901a\u8fc7\u8fd9\u6bb5\u9a8c\u8bc1\uff0c\u5c31\u4e0d\u4f1a\u6267\u884c\uff1a<\/p>\n<p align=\"center\"><img decoding=\"async\" loading=\"lazy\" alt=\"\" width=\"500\" height=\"111\" src=\"http:\/\/inbreak.net\/attachments\/date_201008\/struts2\/7KL75R7O3J1N_s.jpg\" \/><\/p>\n<p>\u3000\u3000\u4ee5\u4e0ashellcode\u5fc5\u987b\u5bf9\u7a7a\u683c\u548c\uff1a\u7b26\u53f7\uff0c\u505a16\u8fdb\u5236\u7684\u8f6c\u4e49\uff0c\u624d\u80fd\u6267\u884c\u3002<\/p>\n<p align=\"center\"><img decoding=\"async\" loading=\"lazy\" alt=\"\" width=\"500\" height=\"18\" src=\"http:\/\/inbreak.net\/attachments\/date_201008\/struts2\/160P1O7KST9U_s.jpg\" \/><\/p>\n<p>\u3000\u3000PS:\u5927\u5bb6\u90fd\u6084\u6084\u7684\uff0c\u4e0d\u8981\u544a\u8bc9\u90a3\u4e9b&ldquo;\u53ea\u62ffpoc\uff0c\u4e0d\u770b\u6280\u672f\u6587\u7ae0\u7684\u90a3\u4e9b\u4e0d\u660e\u771f\u76f8\u7fa4\u4f17&rdquo;\u3002<\/p>\n<p>\u3000\u3000\u6240\u4ee5\uff0c\u8981\u5fc5\u987b\u5148\u89e3\u51b3\u7684\u7b2c\u4e00\u4e2a\u95ee\u9898\u662f\uff0c\u6539\u8fd9\u4e2a\u7a7a\u683c\u4e3a\\u0020\uff0c\u624d\u80fd\u8fdb\u5165ognl\u8868\u8fbe\u5f0f\u7684\u6d41\u7a0b\u3002<\/p>\n<p>\u3000\u3000\u5728\u6bd4\u8f83\u65b0\u4e00\u70b9\u7684\u7248\u672c\u7684xwork\u4e2d\uff0c\u5141\u8bb8\u7a7a\u683c\uff0c\u5f53\u7136\uff0c\u4e5f\u662f\u5141\u8bb8\\u0020\u7684\uff0c\u6240\u4ee5\\u0020\u66ff\u6362\u7a7a\u683c\uff0c\u5c31\u901a\u6740\u4e86\u7b2c\u4e00\u4e2a\u95ee\u9898\u7684\u65b0\u8001\u7248\u672cstruts\u6b63\u5219\u9a8c\u8bc1\u3002<\/p>\n<p align=\"center\"><img decoding=\"async\" loading=\"lazy\" alt=\"\" width=\"500\" height=\"69\" src=\"http:\/\/inbreak.net\/attachments\/date_201008\/struts2\/P15Q1DC8IH05_s.jpg\" \/><\/p>\n<p>\u3000\u3000<strong>denyMethodExecution\u4e0d\u80fd\u4fee\u6539\u7684\u95ee\u9898\uff1a<\/strong><\/p>\n<p>\u3000\u3000\u6539\u5b8c\u4e4b\u540e\uff0c\u53d1\u73b0\u7adf\u7136\u8fd8\u662f\u4e0d\u80fd\u8d4b\u503c\uff0c\u7ecf\u8fc7\u8c03\u8bd5\uff0c\u5728\u5185\u5b58\u4e2d\uff0c\u770b\u5230\u7684 xwork.MethodAccessor.denyMethodExecution\u8fd8\u662ftrue\uff0c\u8fd9\u8bf4\u660e\u8fd9\u4e2a\u8868\u8fbe\u5f0f\uff0c\u6ca1\u6709\u6267\u884c\u6210\u529f\u3002\u539f\u56e0\u662f\u8fd9\u91cc\u505a\u4e86 new\u5bf9\u8c61\u64cd\u4f5c\u3002\u5148\u5b9a\u4e49\u4e86#foo\u53d8\u91cf\u4e3anew java.lang.Boolean\u7c7b\u578b\uff0c\u9ed8\u8ba4\u4e3afalse\uff0c\u4e4b\u540edenyMethodExecution\u7b49\u4e8e#foo\u3002\u8fd9\u662f\u4e0d\u5141\u8bb8\u7684\uff0c\u539f\u6765\u7684POC\u5bfc\u81f4 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src=\"http:\/\/inbreak.net\/attachments\/date_201008\/struts2\/14TX26C392C1_s.jpg\" \/><\/p>\n<p>\u3000\u3000Shellcode\u7684\u539f\u7406\u662f\uff0c\u5229\u7528ognl\u652f\u6301\u9759\u6001\u65b9\u6cd5\u6267\u884c\uff0c\u8c03\u7528java\u7684\u6267\u884c\u7cfb\u7edf\u547d\u4ee4\u65b9\u6cd5(\u5176\u5b9e\u5b8c\u5168\u53ef\u4ee5\u8c03\u7528\u4efb\u4f55java\u4ee3\u7801\uff0c\u6bd4\u5982\u5199\u4e2a\u6587\u4ef6\u7b49)\u3002<\/p>\n<p align=\"center\"><img decoding=\"async\" loading=\"lazy\" alt=\"\" width=\"500\" height=\"31\" src=\"http:\/\/inbreak.net\/attachments\/date_201008\/struts2\/AA19G8J00RYT_s.jpg\" \/><\/p>\n<p>\u3000\u3000Shellcode\u662f\u53ef\u4ee5\u505anew\u64cd\u4f5c\u7684\u3002<\/p>\n<p>\u3000\u3000denyMethodExecution\u4e0d\u80fdnew\u64cd\u4f5c\uff0c\u662f\u56e0\u4e3a\u8fd9\u53e5\u6267\u884c\u65f6\u7684\u4e0a\u4e0b\u6587\u4e2d\uff0c denyMethodExecution\u8fd8\u662ftrue\uff0c\u6267\u884c\u4e86\u8fd9\u53e5\uff0c\u624d\u662ffalse\uff0c\u8fd9\u65f6\u624d\u53ef\u4ee5new\u5bf9\u8c61\u3002<\/p>\n<p>\u3000\u3000\u6240\u4ee5shellcode\u7684\u4e0a\u4e0b\u6587\uff0c\u662f\u53ef\u4ee5\u505anew\u5bf9\u8c61\u64cd\u4f5c\u7684\u3002<\/p>\n<p>\u3000\u3000<strong>Xwork\u7684bug\u95ee\u9898\uff1a<\/strong><\/p>\n<p>\u3000\u3000\u89e3\u51b3\u4e86\u8fd9\u4e24\u4e2a\u95ee\u9898\uff0c\u5176\u5b9e\u5df2\u7ecf\u7ed9shellcode\u521b\u9020\u4e86\u5b8c\u5907\u7684\u73af\u5883\uff0c\u6309\u7167xwork\u7684\u903b\u8f91\uff0c\u5e94\u8be5\u76f4\u63a5\u8ba9\u6211\u4eec\u8c03\u7528\u9759\u6001\u65b9\u6cd5\u624d\u662f\uff0c\u4f46\u662f\u5728shellcode\u8fd0\u884c\u65f6\uff0c\u5c45\u7136\u7206\u51fa\u4e86\u7a7a\u6307\u9488\uff0c\u8fd9\u4e2a\u95ee\u9898\u6211\u7814\u7a76\u4e86\u597d\u4e45\u624d\u641e\u660e\u767d\uff0c\u539f\u6765\u662fxwork\u81ea\u5df1\u51fa\u4e86bug\uff0c\u5230\u4e86\u65b0\u7248\u672c\u65f6\uff0c\u624d\u4fee\u8865\u3002<\/p>\n<p>\u3000\u3000\u7ffb\u7ffbsvn\uff0c\u770b\u5230\u5728xwork2.1.2\u65f6\uff0c\u5077\u5077\u4fee\u6539\u4e86\u4e00\u6bb5\u4ee3\u7801\u3002<\/p>\n<p>\u3000\u3000SecurityMemberAccess\u8fd9\u4e2a\u7c7b\u539f\u6765\u6709\u4e2a\u8fd9\u6837\u7684\u65b9\u6cd5<\/p>\n<p align=\"center\"><img decoding=\"async\" loading=\"lazy\" alt=\"\" width=\"500\" height=\"156\" src=\"http:\/\/inbreak.net\/attachments\/date_201008\/struts2\/PPH52S60070E_s.jpg\" \/><\/p>\n<p>\u3000\u3000\u5230\u4e86xwork2.1.2\u65f6\uff0c\u6539\u4e3a\u4e86\uff1a<\/p>\n<p align=\"center\"><img decoding=\"async\" loading=\"lazy\" alt=\"\" width=\"500\" height=\"247\" src=\"http:\/\/inbreak.net\/attachments\/date_201008\/struts2\/LPTE75AL5E26_s.jpg\" \/><\/p>\n<p>\u3000\u3000\u6ce8\u610f\u6807\u7ea2\u7684\uff0c\u5982\u679cname==null\uff0c\u5c31\u8fd4\u56detrue\u3002<\/p>\n<p>\u3000\u3000\u4e3a\u4ec0\u4e48\u4f1a\u6709\u8fd9\u884c\u4ee3\u7801\u5462\uff1f<\/p>\n<p>\u3000\u3000\u5b83\u8c03\u7528isExcluded(name)\uff0c\u8fdb\u5165isExcluded\u65b9\u6cd5\u540e\uff0c\u505a\u6b63\u5219\u8868\u8fbe\u5f0f\u7684\u9a8c\u8bc1\u3002<\/p>\n<p align=\"center\"><img decoding=\"async\" loading=\"lazy\" alt=\"\" width=\"500\" height=\"252\" src=\"http:\/\/inbreak.net\/attachments\/date_201008\/struts2\/604A781M2IP0_s.jpg\" \/><\/p>\n<p>\u3000\u3000\u5982\u679c\u4f20\u8fdb\u6765\u7684\u662f\u4e2aparamName\u662fnull\uff0c\u5e76\u4e14excludeProperties\u662f\u6709\u503c\u7684\uff0c\u5fc5\u7136\u62a5\u9519\u3002Xwork\u7684bug\u5c31\u662f\uff0c\u6240\u6709\u7684\u7248\u672c\uff0c\u8c03\u7528\u9759\u6001\u65b9\u6cd5\u65f6\uff0c\u90fd\u5fc5\u7136\u4f1a\u4f20\u8fdb\u6765\u4e00\u4e2anull\uff0c\u5e76\u4e14excludeProperties\u4e5f\u662f\u9ed8\u8ba4\u6709\u503c\u7684\u3002<\/p>\n<p align=\"center\"><img decoding=\"async\" loading=\"lazy\" alt=\"\" width=\"500\" height=\"52\" src=\"http:\/\/inbreak.net\/attachments\/date_201008\/struts2\/X545O9368V0P_s.jpg\" \/><\/p>\n<p>\u3000\u3000\u4efb\u4f55\u4e00\u4e2a\u9759\u6001\u65b9\u6cd5\u7684\u8c03\u7528\uff0c\u8fd9\u91cc\u4f20\u8fdb\u6765\u7684\u90fd\u662fnull\u3002<\/p>\n<p>\u3000\u3000\u4e5f\u5c31\u662f\u8bf4\uff0c\u8981\u8c03\u7528\u9759\u6001\u65b9\u6cd5\uff0c\u5c31\u5fc5\u987b\u8ba9excludeProperties\u8fd9\u4e2a\u5bb6\u4f19\u7684\u503c\uff0c\u662f\u4e00\u4e2a\u7a7a\u7684Set\u5bf9\u8c61\uff0c\u5426\u5219\u5bf9null\u5bf9\u6b63\u5219\u5339\u914d\uff0c\u5c31\u4f1a\u62a5\u9519\u3002<\/p>\n<p>\u3000\u3000excludeProperties\u662f\u4e2aSet\uff0c\u5728shell\u6267\u884c\u7684\u4e0a\u4e0b\u6587\u4e2d\uff0c\u5b83\u7684\u503c\u662f\u8fd9\u6837\u6765\u7684\uff1a<\/p>\n<p>\u3000\u3000xwork\u5904\u7406\u7528\u6237\u53d1\u8fdb\u6765\u7684ognl\u8868\u8fbe\u5f0f\u65f6\uff0c\u4f1a\u7528xwork\u7684SecurityMemberAccess\u505a\u6743\u9650\u5224\u65ad\uff0c\u4ee5\u4fdd\u8bc1\u9759\u6001\u65b9\u6cd5\u4e0d\u4f1a\u88ab\u4eba \u968f\u4fbf\u8c03\u7528\u3002\u539f\u7406\u662f\u4f20\u7ed9shell\u6267\u884c\u7684\u4e0a\u4e0b\u6587\u4e2d\u51e0\u4e2a\u9ed8\u8ba4\u914d\u7f6e\uff0c\u5176\u4e2d\u4e00\u4e2a\u662f\u9ed8\u8ba4\u7684allowStaticMethodAccess=true\uff0c\u4e5f\u4f1a\u7ed9 excludeProperties\u8fd9\u4e2aSet\u5bf9\u8c61\u4f1a\u88ab\u6dfb\u52a0\u4e00\u4e2avalue\uff0c\u7ed3\u679c\u5c31\u4e0d\u662f\u7a7a\u7684Set\u5bf9\u8c61\u4e86\u3002<\/p>\n<p>\u3000\u3000\u6240\u4ee5\uff0c\u5728shellcode\u4e0a\u4e0b\u6587\u4e2d\uff0c\u6267\u884c\u9759\u6001\u65b9\u6cd5\u5fc5\u7136\u4f1a\u51fa\u9519\u3002<\/p>\n<p>\u3000\u3000\u8ba9shellcode\u6b63\u5e38\u6267\u884c\uff0c\u89e3\u51b3\u65b9\u6cd5\u7684\u601d\u8def\u5c31\u662fnew\u4e00\u4e2a\u65b0\u7684HashSet\u3002<\/p>\n<p align=\"center\"><img decoding=\"async\" loading=\"lazy\" alt=\"\" width=\"500\" height=\"16\" src=\"http:\/\/inbreak.net\/attachments\/date_201008\/struts2\/0ME11O681V77_s.jpg\" \/><\/p>\n<p>\u3000\u3000\u4f46\u662f\u7ecf\u8fc7\u6211\u6d4b\u8bd5\uff0c\u8fd9\u91cc\u8fd8\u662f\u4e0d\u80fd\u505anew\u7684\u64cd\u4f5c\uff0c\u56e0\u4e3anew\u7684\u65f6\u5019\uff0c\u4f1a\u8c03\u7528\u6784\u9020\u65b9\u6cd5\uff0c\u8fd9\u5b9e\u8d28\u4e0a\u8fd8\u662f\u5728\u8c03\u7528\u65b9\u6cd5\uff0c\u8c03\u7528\u65b9\u6cd5\u5c31\u4f1a\u51fa\u9519\u3002\u4e3a\u4e86\u8bc1\u660e\u6211\u7684\u731c \u6d4b\uff0cdebug\u8c03\u7528\u5230\u8fd9\u4e00\u6b65\u7684\u65f6\u5019\uff0c\u624b\u5de5\u4fee\u6539\u5b83\u4e3anew HashSet()\uff0c\u7acb\u523b\u5c31\u901a\u8fc7\u4e86\u3002\u4e0d\u80fdnew\uff0c\u53c8\u600e\u4e48\u80fd\u5f97\u5230\u4e00\u4e2a\u7a7a\u7684Set\u5462\uff1f\u8fd9\u662f\u6700\u540e\u4e00\u9053\u5173\u5361\u3002\u4e3a\u4e86\u641e\u5b9a\u5b83\uff0c\u6211\u751a\u81f3\u67e5\u4e86struts- default.xml\u5728\u5185\u5b58\u4e2d\u7684\u4f4d\u7f6e\uff0c\u8003\u8651\u662f\u4e0d\u662f\u4f7f\u7528ognl\u4fee\u6539\u6389\u3002<\/p>\n<p>\u3000\u3000\u56e0\u4e3a\u8fd9\u4e2a\u653e\u5f03\u4e86\u4e00\u6bb5\u65f6\u95f4\uff0c\u5f88\u90c1\u95f7\uff0c\u5f53\u6211\u518d\u6b21\u62fe\u8d77\u6765\uff0c\u5374\u7a81\u7136\u770b\u5230\u4e86\u8fd9\u4e2a\u503c\u7684\u9ed8\u8ba4\u503c\u3002<\/p>\n<p align=\"center\"><img decoding=\"async\" loading=\"lazy\" alt=\"\" width=\"500\" height=\"23\" src=\"http:\/\/inbreak.net\/attachments\/date_201008\/struts2\/9D45OM0J9EX7_s.jpg\" \/><\/p>\n<p>\u3000\u3000\u8ddf\u8fdbemptySet();<\/p>\n<p align=\"center\"><img decoding=\"async\" loading=\"lazy\" alt=\"\" width=\"500\" height=\"101\" src=\"http:\/\/inbreak.net\/attachments\/date_201008\/struts2\/3Z47R8IB0Y6K_s.jpg\" \/><\/p>\n<p>\u3000\u3000\u8fd9\u662f\u4e2a\u6709\u610f\u601d\u7684\u77e5\u8bc6\u70b9\uff0c\u6211\u4e5f\u662f\u7b2c\u4e00\u6b21\u4e86\u89e3\u5230\uff0c\u53ef\u4ee5\u4f7f\u7528EMPTY_SET\uff0c\u53d6\u5230\u4e00\u4e2a\u7a7a\u7684set\u3002<\/p>\n<p>\u3000\u3000\u4e8e\u662f\u5f53\u6211\u63d0\u4ea4\u67d0\u4e9b\u4e1c\u897f\uff0c\u8ba9<\/p>\n<p align=\"center\"><img decoding=\"async\" loading=\"lazy\" alt=\"\" width=\"203\" height=\"28\" src=\"http:\/\/inbreak.net\/attachments\/date_201008\/struts2\/C5G9D8ATVBU0_s.jpg\" \/><\/p>\n<p>\u3000\u3000\u8fd9\u4e00\u53e5\u8986\u76d6\u4e86\u9ed8\u8ba4\u7684\u90a3\u4e2a\u6709\u4e86\u4e00\u4e2a\u503c\u7684map\uff0c\u91cd\u65b0\u53d8\u6210\u4e86\u7a7a\u7684map\uff0c\u8fd9\u624d\u771f\u6b63\u7684\u8fbe\u5230\u4e86\u9759\u6001\u65b9\u6cd5\u7684\u7ec8\u6781\u8c03\u7528\u6761\u4ef6\u3002<\/p>\n<p>\u3000\u3000\u5176\u5b9e\u6211\u90fd\u5feb\u5410\u8840\u4e86\uff0c\u660e\u660e\u662fxwork\u81ea\u5df1\u4ee3\u7801\u5199\u7684\u4e0d\u4e25\u8c28\uff0c\u76f4\u5230\u4ed6\u4eec\u65b0\u7684\u7248\u672c\u624d\u53d1\u73b0\u8fd9\u4e2abug\uff0c\u5e76\u4fee\u8865\uff0c\u5c45\u7136\u5bfc\u81f4\u6211\u7814\u7a76\u6f0f\u6d1e\u7684\u540c\u65f6\u8fd8\u987a\u5e26\u5e2e\u4ed6\u4eec\u5904\u7406bug\u3002<\/p>\n<p>\u3000\u3000\u6700\u540e\u7ec8\u4e8e\u627e\u5230\u673a\u4f1a\u9119\u89c6\u4e00\u4e0b\u6f0f\u6d1e\u53d1\u73b0\u8005\u7684poc\uff0c\u4ed6\u8bf4\u8001\u7248\u672c\u7684struts2\u53ef\u4ee5\u4f7f\u7528XXX\u7684POC\uff0c\u7ecf\u8fc7\u6211\u6d4b\u8bd5\uff0c\u4e0d\u53ef\u884c\uff0c\u539f\u7406\u4e5f\u5f88\u7b80\u5355\uff0c\u672c\u6587\u8bf4\u4e86\uff0cPOC\u4e2d\u4e0d\u80fd\u6709\u7a7a\u683c\u3002<\/p>\n<p>\u3000\u3000\u8fd9\u53e5\u8bdd\u5373\u4f7f\u5728\u65b0\u7248\u672c\u4e2d\uff0c\u4e5f\u662f\u6ca1\u4ec0\u4e48\u5f71\u54cd\u7684\uff0c\u867d\u7136\u4f1a\u6539\u53d8\u4e00\u4e2a\u503c\uff0c\u4f46\u662f\u4e0d\u53d7\u5565\u5f71\u54cd\uff0c shellcode\u4e2d\uff0c\u6709\u4e86\u8fd9\u53e5\u8bdd\uff0c\u5c31\u517c\u5bb9\u65b0\u8001\u7248\u672c\uff0c\u4e00\u5207\u901a\u6740\u4e86!<\/p>\n<p><strong>\u3000\u3000\u6700\u540e\u51d1\u51fa\u901a\u67400DAY\u5728\u8fd9\u91cc\uff1a<\/strong><\/p>\n<p><strong>\u3000\u3000\u88ab\u548c\u8c10\u4e86\uff0c\u6ca1\u529e\u6cd5\uff0c\u6bd5\u7adf\u5728\u4e92\u8054\u7f51\u516c\u53f8\u91cc\uff0c\u8981\u8003\u8651\u5230\u5176\u4ed6\u4e92\u8054\u7f51\u516c\u53f8\u540c\u884c\u7684\u5904\u5883\uff0c\u867d\u7136\u4ed6\u4eec\u4e0d\u4e00\u5b9a\u90fd\u662f\u6f0f\u6d1e\u516c\u5e03\u7684POC\u4e0d\u80fd\u6253\u7684\u7248\u672c\u3002<\/strong><\/p>\n<p>\u3000\u3000POC\uff0c\u4e0d\u8981\u627e\u6211\u8981\u4e86\uff0c\u672c\u6587\u4ec5\u4ec5\u8bf4\u4e0b\u6280\u672f\u7814\u7a76\u3002<\/p>\n<p>\u3000\u3000<strong>\u56de\u987e\u4e0b\uff1a<\/strong><\/p>\n<p>\u3000\u3000\u9002\u5408\u65b0\u7248\u672c\u7ed5\u8fc7\u53cc\u5f15\u53f7\u548c\\u0023\u9632\u5fa1\u7684poc\uff1a<\/p>\n<p align=\"center\"><img decoding=\"async\" loading=\"lazy\" alt=\"\" width=\"536\" height=\"76\" src=\"http:\/\/inbreak.net\/attachments\/date_201008\/struts2\/A6R1D8574YT2_s.jpg\" \/><\/p>\n<p>\u3000\u3000\u9002\u5408\u65b0\u7248\u672c\u7ed5\u8fc7\\u0023\u7684poc<\/p>\n<p align=\"center\"><img decoding=\"async\" loading=\"lazy\" alt=\"\" width=\"500\" height=\"72\" src=\"http:\/\/inbreak.net\/attachments\/date_201008\/struts2\/LO05IY7O04FQ_s.jpg\" \/><\/p>\n<p>\u3000\u3000\u4ec5\u4ec5\u9002\u7528\u8001\u7248\u672c(struts2.0.12)\u7684POC<\/p>\n<p align=\"center\"><img decoding=\"async\" loading=\"lazy\" alt=\"\" width=\"500\" height=\"50\" src=\"http:\/\/inbreak.net\/attachments\/date_201008\/struts2\/5C82PF577289_s.jpg\" \/><\/p>\n<p>\u3000\u3000\u4ec5\u4ec5\u9002\u7528\u65b0\u7248\u672c\u7684\u4e5f\u5c31\u662f\u6f0f\u6d1e\u53d1\u73b0\u8005\u653e\u51fa\u6765\u7684poc<\/p>\n<p align=\"center\"><img decoding=\"async\" loading=\"lazy\" alt=\"\" width=\"500\" height=\"72\" src=\"http:\/\/inbreak.net\/attachments\/date_201008\/struts2\/99N7Q39M1R25_s.jpg\" \/><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u3000\u3000\u5728\u6f0f\u6d1e\u53d1\u73b0\u8005\u53d1\u5e03\u7684POC\u4e2d\uff0c\u5e76\u4e0d\u80fd\u5f71\u54cdxwork 2.1.2\u4e4b\u524d\u7684\u4e00\u4e9b\u7248\u672c(\u8fd9\u4e2a\u7248\u672c\u4e4b\u524d\u7684\u4e00\u4e9b\u7248\u672c\uff0c\u4e0b\u6587\u4f1a\u7edf\u79f0\u4e3a\u8001\u7248\u672c\uff0c\u4e4b\u540e\u7684\u53eb\u505a\u65b0\u7248)\uff0c\u4f8b\u5982struts 2.0.14(\u5c31\u662fstruts\u4fee\u8865\u4e86N\u4e2a\u9ad8\u5371\u6f0f\u6d1e\u540e\u7684\u7b2c\u4e00\u4e2a\u7248\u672c\uff0c\u6700\u5e38\u7528\u7684\u7248\u672c)\u5176\u5b9e\u662f\u4e0d\u80fd\u6253\u7684\uff0c\u672c\u6587\u4f1a\u5206\u6790\u8fd9\u4e2a\u6f0f\u6d1e\u7684\u8d77\u56e0\uff0c\u548c\u7ed3\u679c\uff0c\u4e5f\u4f1a\u7ed9\u51fa\u901a\u6740 POC\u7684\u601d\u8def\u3002<\/p>\n<p>\u3000\u3000\u672c\u6587\u5e0c\u671b\u770b\u61c2\u6587\u7ae0\u7684\u4eba\uff0c\u53ef\u4ee5\u4e13\u6ce8\u4e8e\u5206\u6790\u601d\u8def\uff0c\u4f46\u662f\u4e0d\u5e0c\u671b\u5927\u5bb6\u62ff\u7740POC\u5230\u5904\u641e\u7ad9\uff0c\u672c\u6587\u4e0d\u63d0\u4f9b\u4efb\u4f55\u9ed1\u5ba2\u5de5\u5177\uff0c\u6240\u6709\u7684POC\uff0c\u90fd\u662f\u5df2\u7ecf\u516c\u5e03\u8fc7\uff0c\u65e0\u6570\u4eba\u90fd\u77e5\u9053\u7684\u3002<\/p>\n<p class=\"read-more\"><a href=\"https:\/\/www.inbreak.net\/archives\/167.html\">\u7ee7\u7eed\u9605\u8bfb &raquo;<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[84,5],"tags":[70,71,72,73],"views":14277,"_links":{"self":[{"href":"https:\/\/www.inbreak.net\/wp-json\/wp\/v2\/posts\/167"}],"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=167"}],"version-history":[{"count":1,"href":"https:\/\/www.inbreak.net\/wp-json\/wp\/v2\/posts\/167\/revisions"}],"predecessor-version":[{"id":187,"href":"https:\/\/www.inbreak.net\/wp-json\/wp\/v2\/posts\/167\/revisions\/187"}],"wp:attachment":[{"href":"https:\/\/www.inbreak.net\/wp-json\/wp\/v2\/media?parent=167"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.inbreak.net\/wp-json\/wp\/v2\/categories?post=167"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.inbreak.net\/wp-json\/wp\/v2\/tags?post=167"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}