{"id":885,"date":"2025-11-27T22:22:47","date_gmt":"2025-11-27T14:22:47","guid":{"rendered":"http:\/\/47.121.202.229\/?p=885"},"modified":"2025-11-27T22:22:50","modified_gmt":"2025-11-27T14:22:50","slug":"java%e5%bc%80%e5%8f%91%e4%b8%ad%e7%9a%84%e5%ae%89%e5%85%a8%e4%b8%8e%e6%bc%8f%e6%b4%9e","status":"publish","type":"post","link":"http:\/\/47.121.202.229\/?p=885","title":{"rendered":"Java\u5f00\u53d1\u4e2d\u7684\u5b89\u5168\u4e0e\u6f0f\u6d1e"},"content":{"rendered":"\n

\u6700\u8fd1\u8fd9\u5c0f\u534a\u5e74\u90fd\u5728\u641ejava\uff0c\u4f46\u662f\u5bf9java\u5b89\u5168\u65b9\u9762\u7684\u77e5\u8bc6\u8fd8\u505c\u7559\u5728\u539f\u5730\uff0c\u56e0\u6b64\u60f3\u7cfb\u7edf\u7684\u56de\u987e\u3001\u5b66\u4e60\u4e00\u904dJava\u4e2d\u57fa\u672c\u7684\u5b89\u5168\u6f0f\u6d1e\uff0c\u5305\u62ec\u4e00\u4e9b\u5728java\u9879\u76ee\u4e2d\u5e38\u7528\u7684\u7ec4\u4ef6\u548c\u4e2d\u95f4\u4ef6\uff0c\u4ee5\u53ca\u5bf9\u5e94\u7684\u5904\u7406\u63aa\u65bd\u3002<\/p>\n\n\n\n

\u8fd9\u91cc\u63a8\u8350\u4e00\u4e2aJava\u5b89\u5168\u5b66\u4e60\u5f00\u6e90\u9879\u76eeHello-Java-Sec<\/strong>\uff0c\u5df2\u7ecf\u67091.7k\u661f\u6807\uff0c
\u4ed3\u5e93\u5730\u5740\uff1aj3ers3\/Hello-Java-Sec: \u2615\ufe0f Java Security\uff0c\u5b89\u5168\u7f16\u7801\u548c\u4ee3\u7801\u5ba1\u8ba1<\/a><\/p>\n\n\n\n

\u672c\u7bc7\u6587\u7ae0\u53ef\u80fd\u66f4\u591a\u7684\u4f1a\u4ece\u5f00\u53d1\u7684\u89d2\u5ea6\u53bb\u8bb2\u8ff0\u600e\u6837\u7684\u4ee3\u7801\u662f\u5b89\u5168\u7684\uff0c\u600e\u6837\u7684\u4ee3\u7801\u5b58\u5728\u6f0f\u6d1e\uff0c\u5bf9\u6253ctf\u7684\u5e08\u5085\u800c\u8a00\u53ef\u80fd\u63d0\u4f9b\u4e00\u4e9b\u65b0\u7684\u89c6\u89d2\u3002<\/p>\n\n\n\n

\u9879\u76ee\u542f\u52a8<\/h2>\n\n\n\n

\u9879\u76ee\u7684application.properties\u4e2d\u9ed8\u8ba4\u4f7f\u7528\u7684\u662f8888\u7aef\u53e3\uff0c\u6570\u636e\u5e93\u8fde\u63a5\u8d26\u53f7\u5bc6\u7801\u662froot 1234567\uff0c\u5982\u679c\u548c\u81ea\u5df1\u672c\u673a\u73af\u5883\u4e0d\u4e00\u6837\u7684\u53ef\u4ee5\u4fee\u6539\u4e00\u4e0bapplication-dev.properties\u6587\u4ef6\u914d\u7f6e\u5185\u5bb9\u7136\u540e\u91cd\u65b0\u7f16\u8bd1\u6253\u5305\u4e00\u4e0b\uff0c\u5982\u679c\u6709idea\u7684\u8bdd\u66f4\u597d\u4e86\u76f4\u63a5\u542f\u52a8\u5c31\u884c\u3002\u7136\u540e\u8fd8\u6709\u9644\u5e26\u7684\u6587\u4ef6\u4e2dsql\u6587\u4ef6\u9700\u8981\u5bfc\u5165\u4e00\u4e0b\uff0c\u7528\u6765\u505aSQL\u6ce8\u5165\u7684\u3002\u8fd9\u4e2a\u9879\u76ee\u9700\u8981java1.8<\/strong>\uff0c\u6570\u636e\u5e93\u9700\u8981mysql5.7<\/strong>\u53ca\u4ee5\u4e0a\u3002\u9879\u76ee\u542f\u52a8\u56fe\u6807<\/p>\n\n\n\n

\"\"<\/div><\/figure>\n\n\n\n

SQL\u6ce8\u5165<\/h2>\n\n\n\n

JDBC\u6f0f\u6d1e<\/h3>\n\n\n\n

JavaDataBaseConnect\uff0c\u53ef\u4ee5\u901a\u8fc7\u5176\u521b\u5efa\u8fde\u63a5\u3001\u8bed\u53e5\uff0c\u6267\u884c\u8bed\u53e5\u5f97\u5230\u7ed3\u679c\u96c6\u3002\u4f46\u662f\u8fd9\u4e09\u8005\u4f7f\u7528\u5b8c\u4e4b\u540e\u9700\u8981\u624b\u52a8\u91ca\u653e\u3002<\/p>\n\n\n\n

Statement\u8bed\u53e5\u62fc\u63a5<\/h4>\n\n\n\n

\u9996\u5148\u7ed9\u4e0d\u719f\u6089Java\u5f00\u53d1\u7684\u5e08\u5085\u4eec\u8bb2\u4e00\u4e0b\u4ec0\u4e48\u662fstatement\u3002statement\u662fJDBC\u91cc\u4e00\u4e2a\u6267\u884cSQL\u8bed\u53e5\u7684\u63a5\u53e3 \uff0c\u5373\u901a\u8fc7JDBC\u7684\u8fde\u63a5\u5bf9\u8c61\u53ef\u4ee5\u521b\u5efastatement\uff0cstatement\u5bf9\u8c61\u53ef\u4ee5\u7528\u6765\u6267\u884c\u9759\u6001\u7684\u8bed\u53e5\uff0c\u6bd4\u5982\u50cf\u662f\u4e00\u4e2a\u5b57\u7b26\u4e32\u5185\u7684SQL\u8bed\u53e5\u5c31\u662f\u9759\u6001\u7684\uff08\u52a8\u6001\u7684\u53ef\u4ee5\u53c2\u8003mybatis\u4e2dxml\u6620\u5c04\u90a3\u6837\u7684\uff09\u3002\u65e2\u7136\u662f\u9759\u6001\uff0c\u90a3\u6709\u4e9b\u60c5\u51b5\u5c31\u4e0d\u53ef\u80fd\u4e00\u6b21\u6027\u5199\u5b8c\uff0c\u56e0\u4e3a\u8c01\u4e5f\u65e0\u6cd5\u9884\u77e5\u63a5\u4e0b\u6765\u8981\u6267\u884c\u7684SQL\u4e2d\u53c2\u6570\u5230\u5e95\u662f\u4ec0\u4e48\uff0c\u4e00\u4e07\u4e2a\u7528\u6237\u6709\u4e00\u4e07\u6761SQL\uff0c\u56e0\u6b64\u9700\u8981\u62fc\u63a5\u3002\u5c06\u7528\u6237\u4f20\u5165\u7684\u53c2\u6570\u4f5c\u4e3aSQL\u7684\u4e00\u90e8\u5206\uff0c\u62fc\u63a5\u5230\u6700\u7ec8\u7684\u9759\u6001SQL\u8bed\u53e5\u4e2d\uff0c\u90a3\u4e48\u663e\u800c\u6613\u89c1\uff0c\u4e00\u5b9a\u4f1a\u4ea7\u751fSQL\u6ce8\u5165\u6f0f\u6d1e\u3002<\/p>\n\n\n\n

\u89e3\u51b3\u7684\u65b9\u6cd5\u53ef\u4ee5\u5bf9\u7528\u6237\u7684\u8f93\u5165\u8fdb\u884c\u9ed1\u540d\u5355\u8fc7\u6ee4\uff0c\u4f46\u662f\u53ef\u80fd\u4f1a\u88ab\u7ed5\u8fc7\uff0c\u4e5f\u53ef\u80fd\u8bef\u4f24\u3002\u603b\u4e4b\u8fd9\u79cd\u539f\u59cb\u7684\u5199\u6cd5\u662f\u4e0d\u63a8\u8350\u7684\u3002<\/p>\n\n\n\n

PrepareStatement\u8bed\u53e5\u62fc\u63a5<\/h4>\n\n\n\n

PrepareStatement\u662fJDBC\u8fde\u63a5\u5bf9\u8c61\u7684\u4e00\u4e2a\u9884\u7f16\u8bd1SQL\u7684\u63a5\u53e3\uff0c\u901a\u8fc7\u4f20\u5165\u4e00\u4e2a\u53ef\u4ee5\u662f\u4e0d\u5b8c\u5168\u7684SQL\u8bed\u53e5\u8fdb\u884c\u9884\u7f16\u8bd1\uff0c\u4e4b\u540e\u8981\u6267\u884c\u7684\u65f6\u5019\uff0c\u5047\u5982\u8bf4\u8fd9\u4e2a\u9884\u7f16\u8bd1\u7684SQL\u4e0d\u5b8c\u6574\uff0c\u90a3\u4e48\u53ef\u4ee5\u5728\u4f20\u5165\u7f3a\u5c11\u7684\u53c2\u6570\u4e4b\u540e\u8fdb\u884cexecuteQuery\u3002\u4f46\u662f\u6b64\u65f6\u8fd8\u662f\u4f7f\u7528\u4e00\u4e2a\u62fc\u63a5\u7684\u8bed\u53e5\u8fdb\u884c\u9884\u7f16\u8bd1\uff0c\u8fd8\u662f\u4f1a\u6709SQL\u6ce8\u5165\u7684\u6f0f\u6d1e\u3002\u6b63\u786e\u7684\u505a\u6cd5\u662f\u9884\u7f16\u8bd1\u4e00\u4e2a\u6ca1\u6709\u643a\u5e26\u7528\u6237\u53c2\u6570\u7684SQL\u8bed\u53e5\uff0c\u4e4b\u540e\u4f20\u5165\u7528\u6237\u7684\u53c2\u6570\u518d\u8fdb\u884cexecuteQuery\uff0c\u5c31\u80fd\u6709\u6548\u9632\u6b62SQL\u6ce8\u5165\u6f0f\u6d1e\u3002<\/p>\n\n\n\n

JdbcTemplate<\/h4>\n\n\n\n

JdbcTemplate\u662fSpring\u5bf9Jdbc\u5c01\u88c5\u7684\u6a21\u7248\u7c7b\uff0c\u5e95\u5c42\u9ed8\u8ba4\u4f7f\u7528PrepareStatement\u6765\u6267\u884c\u8bed\u53e5\uff0c\u56e0\u6b64\u62e5\u6709\u9884\u7f16\u8bd1\u529f\u80fd\uff0c\u4f46\u8fd8\u662f\u90a3\u4e2a\u95ee\u9898\uff0c\u4e0d\u80fd\u76f4\u63a5\u62fc\u63a5\u800c\u662f\u8981\u7528\u201c\uff1f\u201d\u5360\u4f4d\u7b26\u8fdb\u884c\u9884\u7f16\u8bd1\u5904\u7406\uff0c\u6267\u884c\u65f6\u4f20\u5165\u53c2\u6570\u3002<\/p>\n\n\n\n

\u603b\u800c\u8a00\u4e4b\uff0c\u4f7f\u7528\u539f\u751f\u7684JDBC\u8fdb\u884c\u64cd\u4f5c\u65f6\uff0c\u9700\u8981\u4fdd\u8bc1sql\u8bed\u53e5\u4e0d\u662f\u88ab\u62fc\u63a5\u7684\uff0c\u4e0d\u7ba1\u662f\u4ec0\u4e48\u5f00\u53d1\u8bed\u8a00\uff0c\u8fd9\u90fd\u662f\u9632\u6b62sql\u6ce8\u5165\u7684\u6700\u91cd\u8981\u7684\u624b\u6bb5\u3002<\/p>\n\n\n\n

MyBatis\u6f0f\u6d1e<\/h3>\n\n\n\n

MyBaits\u662f\u4e00\u4e2a\u57fa\u4e8eJDBC\u6784\u5efa\u7684\u6301\u4e45\u5c42\u6846\u67b6\uff0c\u901a\u8fc7\u52a8\u6001\u4ee3\u7406\u7684\u6280\u672f\u751f\u6210\u4ee3\u7406\u5bf9\u8c61\uff0c\u5e76\u751f\u6210\u5bf9\u5e94\u7684sql\u8bed\u53e5\u8fdb\u884c\u6267\u884c\u3002\u5176\u4e2d\u53ef\u4ee5\u4f7f\u7528#{}\u9884\u7f16\u8bd1\u548c\u53c2\u6570\u7ed1\u5b9a\u6765\u907f\u514dsql\u6ce8\u5165\uff0c\u4f46\u662f\u4f7f\u7528\u4e0d\u5f53\u6216\u662f\u914d\u7f6e\u4e0d\u6b63\u786e\u7684\u8bdd\uff0c\u4ecd\u7136\u53ef\u80fd\u4f1a\u6709sql\u6ce8\u5165\u7684\u98ce\u9669\u3002<\/p>\n\n\n\n

order by\u6ce8\u5165<\/h4>\n\n\n\n

Mybatis\u7684#{}\u4f7f\u7528\u7684\u662fPreparedStatement\u8fdb\u884c\u9884\u7f16\u8bd1\uff0c\u5728\u6267\u884c\u65f6\u901a\u8fc7JDBC\u7684setXxx()\u65b9\u6cd5\u8bbe\u7f6e\uff0c\u4fdd\u6301\u4e86\u5bf9\u8c61\u7684\u539f\u59cb\u7c7b\u578b\u3002\u56e0\u6b64\uff0c\u5047\u5982\u4f20\u5165\u7684\u53c2\u6570\u65f6String\u7c7b\u578b\uff0c\u5e76\u4e14\u5176\u4f5c\u4e3aorder by\u8fdb\u884c\u6392\u5e8f\u7684\u53c2\u6570\uff0c\u6700\u540e\u7684\u8bed\u53e5\u5c31\u662f\u7c7b\u4f3c\u8fd9\u6837\u7684<\/p>\n\n\n\n

ORDER BY 'name' DESC<\/code><\/pre>\n\n\n\n
\u5c31\u4f1a\u5bfc\u81f4\u662f\u7528\u4e00\u4e2a\u5e38\u91cf\u503c\u8fdb\u884c\u6392\u5e8f\uff0c\u800c\u4e0d\u662f\u6570\u636e\u5e93\u4e2d\u7684\u5217\u540d\uff0c\u6392\u5e8f\u7684\u6548\u679c\u5c31\u6d88\u5931\u4e86\u3002<\/p>\n\n\n\n
\u800c${}\u5728SQL\u6784\u5efa\u65f6\u53ea\u8fdb\u884c\u7b80\u5355\u7684\u6587\u672c\u66ff\u6362\uff0c\u4e22\u5931\u539f\u59cb\u7c7b\u578b\u4fe1\u606f\u3002\u5f00\u53d1\u8005\u4e3a\u4e86\u7b80\u5316\u64cd\u4f5c\uff0c\u60f3\u4f7f\u7528${}\u6765\u89e3\u51b3order by\u6392\u5e8f\u6548\u679c\u4e22\u5931\u7684\u95ee\u9898\uff0c\u90a3\u4e48\u5c31\u53ef\u80fd\u4f1a\u5bfc\u81f4sql\u6ce8\u5165\u3002\u56e0\u4e3a\u8fd9\u4e2a\u6548\u679c\u548c\u76f4\u63a5\u62fc\u63a5\u662f\u4e00\u6837\u7684\u3002<\/p>\n\n\n\n
\u4e0d\u4ec5\u662forder by\uff0c\u4efb\u4f55\u9700\u8981SQL\u6807\u8bc6\u7b26\u7684\u5730\u65b9\u90fd\u4f1a\u5b58\u5728\u8fd9\u4e2a\u95ee\u9898\uff0c\u6bd4\u5982\u8bf4select * from #{tableName}\uff0c\u4f20\u5165\u5b57\u7b26\u4e32\u7684\u8bdd\u4f1a\u5bfc\u81f4\u6570\u636e\u5e93\u65e0\u6cd5\u8bc6\u522b\u5230\u8fd9\u4e2a\u8868\u540d\uff0c\u800c\u4f7f\u7528${}\u53c8\u4f1a\u9020\u6210sql\u6ce8\u5165\u3002<\/p>\n\n\n\n
\u89e3\u51b3\u529e\u6cd5\u662f\u5bf9\u4f20\u5165\u7684SQL\u6807\u8bc6\u7b26\u7684\u503c\u8fdb\u884c\u6620\u5c04\uff1a<\/p>\n\n\n\n
<mapper namespace=\"com.best.hello.mapper.UserMapper\">\n    <select id=\"orderBySafe\" resultType=\"com.best.hello.entity.User\">\n        select * from users\n        <choose>\n            <!-- \u6839\u636e\u5b57\u6bb5\u9009\u62e9\u6392\u5e8f\u65b9\u5f0f\uff0c\u907f\u514d SQL \u6ce8\u5165 -->\n            <when test=\"field == 'id'\">\n                order by id desc\n            <\/when>\n            <when test=\"field == 'user'\">\n                order by user desc\n            <\/when>\n            <otherwise>\n                <!-- \u9ed8\u8ba4\u6392\u5e8f\u65b9\u5f0f\uff0c\u9632\u6b62\u4e0d\u5408\u6cd5\u8f93\u5165 -->\n                order by id asc limit 1\n            <\/otherwise>\n        <\/choose>\n    <\/select>\n<\/mapper><\/code><\/pre>\n\n\n\n
\u5f53\u7136\uff0c\u5728\u6b63\u5e38\u7684\u5f00\u53d1\u89c4\u8303\u4e2d\uff0c\u662f\u4e0d\u53ef\u80fd\u8ba9\u7528\u6237\u4f20\u5165\u7684\u503c\u4f5c\u4e3aSQL\u6807\u8bc6\u7b26\u7684\u3002\u6b63\u786e\u7684\u5f00\u53d1\u89c4\u8303\u4e0d\u4f1a\u5bfc\u81f4\u8fd9\u4e2a\u95ee\u9898\u51fa\u73b0\u3002<\/p>\n\n\n\n
\u641c\u7d22\u6ce8\u5165<\/h4>\n\n\n\n
\u5728\u4f7f\u7528\u6a21\u7cca\u67e5\u8be2\u7684\u65f6\u5019\uff0c\u5047\u5982\u76f4\u63a5\u4f7f\u7528like '%#{q}%'<\/code><\/strong>\u4f1a\u5bfc\u81f4\u8bed\u6cd5\u9519\u8bef\uff0c\u56e0\u4e3a#{}<\/code><\/strong>\u672c\u8d28\u662f\u53c2\u6570\u5360\u4f4d\u7b26\uff0c\u5728\u7b2c\u4e00\u6b21\u8fdb\u884c\u9884\u7f16\u8bd1\u7684\u65f6\u5019\uff0c\u751f\u6210\u7684SQL\u8bed\u53e5\u662f\u8fd9\u6837\u7684<\/p>\n\n\n\n
SELECT * FROM users WHERE user LIKE '%?%'<\/code><\/pre>\n\n\n\n
\u672c\u6765like\u540e\u9762\u671f\u5f85\u7684\u662f\u4e00\u4e2a?<\/code><\/strong> \uff0c\u8fd9\u6837\u4e00\u6765\u9884\u7f16\u8bd1like\u540e\u9762\u5c31\u53d8\u6210\u4e86\u5b57\u7b26\u4e32'%?%'<\/code><\/strong>\uff0c\u5728\u9884\u7f16\u8bd1\u7684\u65f6\u5019\u5c31\u5df2\u7ecf\u786e\u5b9a\u4e86\u6700\u7ec8\u7684sql\uff0c\u4e0d\u7ba1\u540e\u9762\u600e\u4e48\u8bbe\u7f6e\u53c2\u6570\u90fd\u65e0\u6d4e\u4e8e\u4e8b\u4e86\u3002\u5bfc\u81f4\u6a21\u7cca\u67e5\u8be2\u7684\u6548\u679c\u5931\u6548\u3002<\/p>\n\n\n\n
\u7a0b\u5e8f\u5458\u5982\u679c\u5077\u61d2\uff0c\u7528'%${q}%<\/code><\/strong>\u8fdb\u884c\u66ff\u4ee3\uff0c\u5c31\u4f1a\u5bfc\u81f4sql\u6ce8\u5165\u3002<\/p>\n\n\n\n
\/\/ \u653b\u51fb\u8005\u8f93\u5165\uff1a\nString maliciousInput = \"admin' OR user LIKE '%\";\n\n\/\/ \u4f7f\u7528 ${} \u7684\u4ee3\u7801\uff1a\n@Select(\"SELECT * FROM users WHERE user LIKE '%${q}%'\")\nList<User> searchVul(String q);\n\n\/\/ \u751f\u6210\u7684SQL\uff1a\nSELECT * FROM users WHERE user LIKE '%admin' OR user LIKE '%%'\n\/\/ \u8fd9\u76f8\u5f53\u4e8e\uff1aSELECT * FROM users WHERE user LIKE '%admin' OR true\n\/\/ \u8fd4\u56de\u6240\u6709\u7528\u6237\u8bb0\u5f55\uff01<\/code><\/pre>\n\n\n\n
\u6b63\u786e\u7684\u5199\u6cd5\u662f\uff0c\u4f7f\u7528CONCAT<\/code><\/strong>\u5c06\u901a\u914d\u7b26\u4e0e\u53c2\u6570\u62fc\u63a5\u6210\u5b57\u7b26\u4e32\uff0c\u7136\u540e\u8fd9\u4e2a\u5b57\u7b26\u4e32\u4f5c\u4e3aLIKE\u7684\u6761\u4ef6\u3002CONCAT<\/code><\/strong>\u51fd\u6570\u662f\u6570\u636e\u5e93\u51fd\u6570\uff0c\u5728SQL\u6267\u884c\u65f6\u8ba1\u7b97\uff0c\u56e0\u6b64\u5728\u9884\u7f16\u8bd1\u9636\u6bb5\u65f6\uff0cCONCAT\u5185\u7684\u7ed3\u6784\u4e0d\u4f1a\u88ab\u7834\u574f\uff0c\u53ea\u662f\u5c06\u5360\u4f4d\u7b26\u66ff\u6362\u6210 ?<\/code><\/strong><\/p>\n\n\n\n
SELECT * FROM users WHERE user LIKE CONCAT('%', ?, '%')<\/code><\/pre>\n\n\n\n
\u6216\u8005\u8bf4\uff0c\u5982\u679c\u4e0d\u60f3\u4f7f\u7528CONCAT\uff0c\u5c31\u8981\u5728\u4f20\u5165\u53c2\u6570\u65f6\u7684\u4e1a\u52a1\u4ee3\u7801\u4e2d\u5c06\u901a\u914d\u7b26\u4e0eLIKE\u9700\u8981\u7684\u53c2\u6570\u62fc\u63a5\u597d\uff0cLIKE\u540e\u76f4\u63a5\u63a5\u4e0a#{titleQuery}<\/p>\n\n\n\n
if (!ObjectUtils.isEmpty(exampleName)) {\n            titleQuery = \"%\" + exampleName + \"%\";\n        }\n        List<CusSceneExamplePo> poList = cusSceneExampleMapper.getSceneExampleList(titleQuery);<\/code><\/pre>\n\n\n\n
scene_title like #{titleQuery}<\/pre>\n\n\n\n
\u4efb\u610f\u6587\u4ef6\u64cd\u4f5c<\/h2>\n\n\n\n
\u4efb\u610f\u6587\u4ef6\u4e0a\u4f20<\/h3>\n\n\n\n
@PostMapping(\"\/uploadVul\")\npublic String uploadVul(@RequestParam(\"file\") MultipartFile file) {\n    try {\n        byte[] bytes = file.getBytes();\n        Path dir = Paths.get(UPLOADED_FOLDER);\n        Path path = Paths.get(UPLOADED_FOLDER + file.getOriginalFilename());\n        Files.write(path, bytes);\n    } catch (Exception e) {\n         return e.toString();\n    }\n    return \"redirect:uploadStatus\";\n}<\/code><\/pre>\n\n\n\n
\u8fd9\u662fSpring\u6846\u67b6\u4e2d\u6700\u57fa\u672c\u7684\u63a5\u6536\u6587\u4ef6\u4e0a\u4f20\u7684controller\uff0c\u4e0d\u8fc7\u4e00\u822c\u89e3\u6790\u6587\u4ef6\u8fd9\u4e00\u6b65\u4f1a\u653e\u5728Service\u4e2d\u53bb\u505a\uff0c\u8fd9\u91cc\u53ea\u662f\u4e3a\u4e86\u65b9\u4fbf\u5c55\u793a\u3002<\/p>\n\n\n\n
\u4e0a\u9762\u8fd9\u79cd\u5199\u6cd5\u662f\u6700\u4e0d\u5b89\u5168\u7684\u5199\u6cd5\uff0c\u56e0\u4e3a\u6ca1\u6709\u4efb\u4f55\u8fc7\u6ee4\uff0c\u4f1a\u6709\u8def\u5f84\u904d\u5386\u6f0f\u6d1e\u3001\u4efb\u610f\u6587\u4ef6\u4e0a\u4f20\u6f0f\u6d1e<\/strong>\u3001\u6587\u4ef6\u540d\u51b2\u7a81\u4e0e\u8986\u76d6\u6f0f\u6d1e\u3001\u4fe1\u606f\u6cc4\u9732\u7b49\u7b49\u3002<\/p>\n\n\n\n
\u5b89\u5168\u4ee3\u7801\u6d41\u7a0b<\/h4>\n\n\n\n
\u5b89\u5168\u7684\u5199\u6cd5<\/strong>\uff0c\u9996\u5148\u8981\u8fdb\u884c\u57fa\u7840\u9a8c\u8bc1\uff0c\u5373\u6587\u4ef6\u662f\u5426\u4e3a\u7a7a\u3001\u6587\u4ef6\u5927\u5c0f\uff1b\u4e4b\u540e\u83b7\u53d6\u6587\u4ef6\u7684\u6587\u4ef6\u540d\uff0c\u8fd9\u4e00\u6b65\u5982\u679c\u662f\u5728Spring\u6846\u67b6\u4e2d\uff0c\u5c31\u8981\u7528\u5230StringUtils.cleanPath()<\/code><\/strong>\u51fd\u6570\uff0c\u8fd9\u4e2a\u51fd\u6570\u4f1a\u5bf9\u6587\u4ef6\u540d\u7684\u659c\u6760\u7edf\u4e00\u8f6c\u6362\u6210\u6b63\u659c\u6760\uff08\/\uff09\uff0c\u5e76\u628a\u6240\u6709\u8def\u5f84\u4e2d\u7684..\/<\/code><\/strong>\u79fb\u9664\uff0c\u9632\u6b62\u8def\u5f84\u904d\u5386\u6f0f\u6d1e<\/p>\n\n\n\n
\u4e4b\u540e\u5c31\u662f\u7528\u6587\u4ef6\u7c7b\u578b\u767d\u540d\u5355\u8fc7\u6ee4\uff0ccontent-type\u767d\u540d\u5355\u8fc7\u6ee4\u3002\u518d\u4e4b\u540e\u53ef\u4ee5\u9488\u5bf9\u6587\u4ef6\u5185\u5bb9\u8fdb\u884c\u9a8c\u8bc1\uff0c\u6bd4\u5982\u8bf4\u5bf9\u4e8e\u56fe\u7247\uff0c\u56e2\u961f\u5185\u90e8\u53ef\u80fd\u4f1a\u6709\u4e00\u4e2aisValidImage()\u7684\u8f6e\u5b50\uff0c\u5bf9\u56fe\u7247\u6587\u4ef6\u524d\u9762\u51e0\u4e2a\u5b57\u8282\u7801\u5224\u65ad\uff0c\u5224\u65ad\u8fd9\u4e2a\u6587\u4ef6\u5230\u5e95\u662f\u4e0d\u662f\u8ddfcontent-type\u6240\u4e00\u81f4\u7684\uff0ccontent-type\u662f\u5426\u662f\u7ecf\u8fc7\u4f2a\u9020\u7684\uff0c\u8fd9\u4e00\u6b65\u90fd\u80fd\u5224\u65ad\u3002<\/p>\n\n\n\n
\u5728\u6700\u540e\u5c31\u662f\u8fdb\u884c\u5b89\u5168\u7684\u6587\u4ef6\u540d\u751f\u6210\uff0c\u8fd8\u6709\u8981\u4fdd\u5b58\u7684\u8def\u5f84\u7684\u521b\u5efa\uff0c\u6700\u540e\u4fdd\u5b58\u6587\u4ef6\u3002\u5f53\u7136\uff0c\u8fd9\u91cc\u6ce8\u610f\u4e0d\u8981\u7ed9\u524d\u7aef\u56de\u663e\u6587\u4ef6\u7684\u4fdd\u5b58\u8def\u5f84\u3002<\/p>\n\n\n\n
\u5982\u679c\u662f\u60f3\u4e86\u89e3\u4e00\u4e9b\u6587\u4ef6\u4e0a\u4f20\u7684\u653b\u51fb\u624b\u6cd5\uff0c\u53ef\u4ee5\u770b\u6211\u4e4b\u524d\u53d1\u7684\u6587\u7ae0Upload-Labs\u901a\u5173\u8bb0\u5f55 \u2013 \u675c\u8150\u8150\u306e\u5c0f\u7a9d<\/a><\/p>\n\n\n\n
\u76ee\u5f55\u904d\u5386<\/h3>\n\n\n\n
\u4e0a\u9762\u6587\u4ef6\u4e0a\u4f20\u7684\u4ee3\u7801\u4e2d\uff0c\u63d0\u5230\u4e86\u76ee\u5f55\u904d\u5386\u7684\u6f0f\u6d1e\uff0c\u6587\u4ef6\u4e0a\u4f20\u70b9\u7684\u8fd9\u79cd\u76ee\u5f55\u904d\u5386\u6f0f\u6d1e\u4e3b\u8981\u7528\u5904\u662f\u7528\u4e0a\u4f20\u7684\u6587\u4ef6\u628a\u5bf9\u5e94\u7684\u670d\u52a1\u5668\u4e0a\u76ee\u6807\u6587\u4ef6\u8986\u76d6\uff0c\u6bd4\u5982\u76ee\u6807\u670d\u52a1\u5668\u7684Java\u5e94\u7528\u7a0b\u5e8f\u6070\u597d\u4f7f\u7528root\u6743\u9650\u8fd0\u884c\uff0c\u7136\u540e\u9012\u5f52\u4f7f\u7528..\/\u904d\u5386\u5230\u76ee\u6807\u670d\u52a1\u5668\u7684\u6839\u76ee\u5f55\uff0c\u7136\u540e\u628aetc\/password\u4e0b\u7684\u5bc6\u7801\u6587\u4ef6\u7ed9\u8986\u76d6\u6389\uff0c\u4ece\u800c\u8fbe\u5230ssh\u8fde\u63a5\u6216\u8005\u662f\u5176\u5b83\u7684\u76ee\u7684\u3002<\/p>\n\n\n\n
\u4efb\u610f\u6587\u4ef6\u4e0b\u8f7d<\/h4>\n\n\n\n
@GetMapping(\"\/download\")\npublic ResponseEntity<Resource> download(@RequestParam String filename) {\n    try {\n        \/\/ \u83b7\u53d6\u5f53\u524d\u5de5\u4f5c\u76ee\u5f55\n        String currentDir = System.getProperty(\"user.dir\");\n        \n        \/\/ \u62fc\u63a5\u8def\u5f84\uff1a\u5f53\u524d\u76ee\u5f55 + \u6587\u4ef6\u540d\n        Path filePath = Paths.get(currentDir, filename);\n        \n        Resource resource = new FileSystemResource(filePath);\n\n        if (resource.exists()) {\n            return ResponseEntity.ok()\n                .contentType(MediaType.APPLICATION_OCTET_STREAM)\n                .header(HttpHeaders.CONTENT_DISPOSITION, \n                       \"attachment; filename=\\\"\" + resource.getFilename() + \"\\\"\")\n                .body(resource);\n        }\n        return ResponseEntity.notFound().build();\n    } catch (Exception e) {\n        return ResponseEntity.internalServerError().build();\n    }\n}<\/code><\/pre>\n\n\n\n
\u4ee5\u4e0a\u4ee3\u7801\u662fSpring\u4e2d\u6700\u57fa\u672c\u7684\u6587\u4ef6\u4e0b\u8f7d\u7684Controller\uff0c\u6700\u57fa\u672c\u7684\u529f\u80fd\u5c31\u5b58\u5728\u6700\u591a\u7684\u5b89\u5168\u95ee\u9898\uff0c\u7528\u6237\u53ef\u4ee5\u4f20\u5165..\/<\/code><\/strong>\u8fdb\u884c\u670d\u52a1\u5668\u4e0a\u7684\u4efb\u610f\u6587\u4ef6\u4e0b\u8f7d<\/p>\n\n\n\n
\u4efb\u610f\u6587\u4ef6\u8bbf\u95ee<\/h4>\n\n\n\n
\u5982\u679c\u670d\u52a1\u7aef\u7684\u8fd9\u6bb5\u4ee3\u7801\u662f\u8bbf\u95ee\u6587\u4ef6\u5185\u5bb9\uff0c\u4e5f\u662f\u7528\u8fd9\u6837\u7684\u6307\u5b9a\u76ee\u5f55+\u7528\u6237\u8f93\u5165\u62fc\u63a5<\/strong>\u7684\u8def\u5f84\uff0c\u4e00\u6837\u80fd\u9020\u6210\u4efb\u610f\u6587\u4ef6\u8bbf\u95ee\u6f0f\u6d1e\u3002<\/p>\n\n\n\n
\u5b89\u5168\u4ee3\u7801\u6d41\u7a0b<\/h4>\n\n\n\n
\u7ad9\u5728\u5b89\u5168\u7684\u89c6\u89d2\uff0c\u60f3\u8981\u5229\u7528\u6f0f\u6d1e\uff0c\u9996\u5148\u5c31\u662f\u641e\u6e05\u695a\u76ee\u6807\u70b9\u5230\u5e95\u662f\u6587\u4ef6\u4e0a\u4f20\u3001\u6587\u4ef6\u4e0b\u8f7d\u8fd8\u662f\u6587\u4ef6\u5185\u5bb9\u8bbf\u95ee\u3002\u5bf9\u4e8e\u6587\u4ef6\u4e0a\u4f20\uff0c\u6211\u53ef\u4ee5\u4e0a\u4f20\u6728\u9a6c\uff0c\u4e5f\u53ef\u4ee5\u901a\u8fc7\u76ee\u5f55\u904d\u5386\u7684\u65b9\u5f0f\u8986\u76d6\u6389\u539f\u6709\u7684\u6587\u4ef6\u8fbe\u6210\u4e00\u4e9b\u76ee\u7684\uff1b\u5bf9\u4e8e\u6587\u4ef6\u4e0b\u8f7d\uff0c\u6211\u53ef\u4ee5\u901a\u8fc7\u76ee\u5f55\u904d\u5386\u7684\u65b9\u5f0f\u4e0b\u8f7d\u5230\u6211\u60f3\u8981\u7684\u670d\u52a1\u5668\u4e2d\u7684\u654f\u611f\u4fe1\u606f\uff1b\u5bf9\u4e8e\u6587\u4ef6\u5185\u5bb9\u8bbf\u95ee\u70b9\uff0c\u4e00\u6837\u4e5f\u53ef\u4ee5\u901a\u8fc7\u76ee\u5f55\u904d\u5386\u83b7\u53d6\u6211\u60f3\u8981\u7684\u6587\u4ef6\u5185\u5bb9\u3002<\/p>\n\n\n\n
\u7ad9\u5728\u5f00\u53d1\u7684\u89c6\u89d2\uff0c\u60f3\u8981\u5199\u51fa\u907f\u514d\u76ee\u5f55\u904d\u5386\u6f0f\u6d1e\u7684\u4ee3\u7801\uff0c\u5982\u679c\u8bf4\u63d0\u4f9b\u4e0b\u8f7d\u7684\u6587\u4ef6\u6216\u662f\u5141\u8bb8\u8bbf\u95ee\u7684\u6587\u4ef6\u5185\u5bb9\u5c31\u90a3\u4e48\u51e0\u4e2a<\/strong>\uff0c\u90a3\u4e48\u7981\u6b62\u4f7f\u7528\u7528\u6237\u4f20\u5165\u7684\u6570\u636e\u4f5c\u4e3a\u76ee\u5f55\u7684\u7ec4\u6210<\/strong>\uff0c\u800c\u662f\u901a\u8fc7\u6620\u5c04\u6216\u662f\u5176\u5b83\u65b9\u5f0f\uff0c\u7531\u540e\u7aef\u4ee3\u7801\u81ea\u5df1\u53bb\u5df2\u7ecf\u8bbe\u5b9a\u597d\u7684\u8def\u5f84\u4e0b\u8fd4\u56de\u6587\u4ef6\u6216\u662f\u5185\u5bb9\u3002<\/p>\n\n\n\n
\u50cf\u662f\u56fe\u5e93\u7f51\u7ad9\uff0c\u6216\u662f\u89c6\u9891\u7f51\u7ad9\uff0c\u63d0\u4f9b\u6d77\u91cf\u7684\u8d44\u6e90\u8ba9\u7528\u6237\u4e0b\u8f7d\u6216\u8bbf\u95ee\uff0c\u5b89\u5168\u7684\u5199\u6cd5\u4f9d\u65e7\u662f\u5c42\u5c42\u8fc7\u6ee4\u3002\u9996\u5148\u5bf9\u7528\u6237\u7684\u8f93\u5165\u8fdb\u884c\u8fc7\u6ee4\uff0c\u5224\u65ad\u7528\u6237\u8f93\u5165\u662f\u5426\u5408\u6cd5\uff1b\u4e4b\u540e\u4f7f\u7528\u9884\u8bbe\u7684\u5b89\u5168\u7684\u8def\u5f84\u4f5c\u4e3a\u6784\u5efa\u8def\u5f84\u7684\u57fa\u7840\uff0c\u62fc\u63a5\u51fa\u5b8c\u6574\u7684\u8def\u5f84\uff1b\u4e4b\u540e\u68c0\u67e5\u5bf9\u5e94\u8def\u5f84\u4e0b\u7684\u6587\u4ef6\u662f\u5426\u5b58\u5728\uff1b\u5b58\u5728\u7684\u8bdd\uff0c\u6587\u4ef6\u7c7b\u578b\u662f\u5426\u662f\u8fd9\u4e2a\u63a5\u53e3\u671f\u671b\u8fd4\u56de\u7684\u7c7b\u578b\uff0c\u6bd4\u5982\u8fd9\u4e2a\u63a5\u53e3\u53ea\u80fd\u8fd4\u56dejpg\uff0c\u8fd9\u4e2a\u6587\u4ef6\u7c7b\u578b\u4f1a\u4e0d\u4f1a\u662f\u5176\u5b83\u7684\u7c7b\u578b\uff1b\u6700\u540e\u68c0\u67e5\u4e00\u904d\u8fd9\u4e2a\u6587\u4ef6\u7684\u5408\u6cd5\u6027\uff0c\u53ef\u4ee5\u6839\u636e\u6587\u4ef6\u7684\u6743\u9650\u5c5e\u6027\uff0c\u6bd4\u5982\u6587\u4ef6\u4e0d\u53ef\u8bfb\uff0c\u90a3\u4e48\u80af\u5b9a\u4e0d\u80fd\u63d0\u4f9b\u4e0b\u8f7d\u8bbf\u95ee\uff0c\u4e5f\u53ef\u4ee5\u6839\u636e\u5177\u4f53\u7684\u4e1a\u52a1\uff0c\u6bd4\u5982\u53ea\u80fd\u4e0b\u8f7d2025.11.30\u4ee5\u540e\u7684\u6587\u4ef6\uff1b\u6700\u540e\u624d\u662f\u8fd4\u56de\u4e0b\u8f7d\u6587\u4ef6\u3002<\/p>\n\n\n\n
\u5931\u6548\u7684\u8eab\u4efd\u8ba4\u8bc1<\/h2>\n\n\n\n
JWT\u5f31\u52a0\u5bc6<\/h3>\n\n\n\n
JSON Web Token\u662f\u670d\u52a1\u7aef\u7528\u6765\u9a8c\u8bc1\u7528\u6237\u8eab\u4efd\u3001\u83b7\u53d6\u7528\u6237\u57fa\u672c\u4fe1\u606f\u7684\u5b57\u7b26\u4e32\uff0c\u751f\u6210JWT\u9700\u8981\u670d\u52a1\u7aef\u7684\u79d8\u94a5\u8fdb\u884c\u7b7e\u540d\uff0c\u670d\u52a1\u7aef\u6536\u5230\u7528\u6237\u4f20\u9012\u7684JWT\u4e5f\u9700\u8981\u7b7e\u540d\u79d8\u94a5\u8fdb\u884c\u9a8c\u8bc1\u7b7e\u540d\u3002\u5047\u5982\u8bf4\u8fd9\u4e2a\u7b7e\u540d\u79d8\u94a5\u662f123456<\/code><\/strong>\uff0c\u90a3\u4e48\u5f88\u5bb9\u6613\u88ab\u7206\u7834\u51fa\u6765\uff0c\u4ece\u800c\u9020\u6210CSRF\u6f0f\u6d1e<\/p>\n\n\n\n
\u9a8c\u8bc1\u7801\u590d\u7528<\/h3>\n\n\n\n
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XSS<\/h2>\n\n\n\n
\u53cd\u5c04\u578b<\/h3>\n\n\n\n
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SSRF<\/h2>\n\n\n\n
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