{"id":27799,"date":"2023-07-30T23:25:45","date_gmt":"2023-11-23T05:05:40","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/log4j%e6%bc%8f%e6%b4%9e%e7%9a%84%e6%a6%82%e8%bf%b0%e5%8f%8a%e5%85%b6%e6%96%b9%e6%b3%95%e5%92%8c%e5%af%b9%e7%ad%96\/"},"modified":"2025-08-12T04:41:13","modified_gmt":"2025-08-11T20:41:13","slug":"log4j%e6%bc%8f%e6%b4%9e%e7%9a%84%e6%a6%82%e8%bf%b0%e5%8f%8a%e5%85%b6%e6%96%b9%e6%b3%95%e5%92%8c%e5%af%b9%e7%ad%96","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/log4j%e6%bc%8f%e6%b4%9e%e7%9a%84%e6%a6%82%e8%bf%b0%e5%8f%8a%e5%85%b6%e6%96%b9%e6%b3%95%e5%92%8c%e5%af%b9%e7%ad%96\/","title":{"rendered":"Log4J\u6f0f\u6d1e\u7684\u6982\u8ff0\u53ca\u5176\u65b9\u6cd5\u548c\u5bf9\u7b56"},"content":{"rendered":"

\u8106\u5f31\u6027\u306e\u6982\u8981<\/h1>\n

Log4J\u3068\u306f\u3001Apache\u304c\u958b\u767a\u3059\u308bJava\u7528\u306e\u30ed\u30ae\u30f3\u30b0\u30e9\u30a4\u30d6\u30e9\u30ea\u3002
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\n\u4f8b\u3068\u3057\u3066\u3001${java:runtime}\u3068\u3044\u3046\u6587\u5b57\u5217\u306f\u3001Java\u306e\u30d0\u30fc\u30b8\u30e7\u30f3\u6587\u5b57\u5217\u306b\u7f6e\u63db\u3055\u308c\u308b\u3002<\/p>\n

\u305d\u306e\u4e2d\u3067\u3082\u3001\u4eca\u56de\u539f\u56e0\u306b\u306a\u3063\u305f\u306e\u306f\u3001Jndi Lookup\u3067\u3042\u308b\u3002
\nJndi Lookup\u306f\u3001\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u4e0a\u304b\u3089\u5024\u3092\u53d6\u5f97\u3057\u7f6e\u63db\u3059\u308b\u3082\u306e\u3067\u3042\u308b\u3002
\n\u4f7f\u7528\u3059\u308b\u3068\u3001LDAP\u306e\u3088\u3046\u306a\u30c7\u30a3\u30ec\u30af\u30c8\u30ea\u3078\u30a2\u30af\u30bb\u30b9\u3059\u308b\u30d7\u30ed\u30c8\u30b3\u30eb\u3092\u7d4c\u7531\u3057\u3066\u5916\u90e8\u30d5\u30a1\u30a4\u30eb\u3078\u306e\u30a2\u30af\u30bb\u30b9\u3092\u5b9f\u884c\u3055\u305b\u308b\u3053\u3068\u304c\u53ef\u80fd\u3067\u3042\u308b\u3002
\n\u305d\u306e\u305f\u3081\u3001\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u4e0a\u306bJava\u30af\u30e9\u30b9\u30d5\u30a1\u30a4\u30eb\u3092\u914d\u7f6e\u3057\u305fLDAP\u30b5\u30fc\u30d0\u30fc\u3092\u69cb\u7bc9\u3057\u3001URL\u3092Lookup\u306e\u6587\u5b57\u5217\u306b\u5f53\u3066\u306f\u3081\u9001\u4fe1\u3059\u308b\u3068Java Runtime\u3067\u305d\u306e\u30d7\u30ed\u30b0\u30e9\u30e0\u304c\u5b9f\u884c\u3055\u308c\u308b\u3002<\/p>\n

CVE\uff1aCVE-2021-44228<\/p>\n

JNDI Lookup\u306e\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8<\/p>\n

\u6280\u5de7<\/h1>\n

\u642d\u5efaLDAP\u670d\u52a1\u5668\uff0c\u5e76\u5c06\u8981\u6267\u884c\u7684\u7c7b\u6587\u4ef6\u653e\u7f6e\u5176\u4e2d\u3002
\n\u7136\u540e\uff0c\u5c06URL\u5339\u914d\u5982\u4e0b\uff0c\u5e76\u4f7f\u7528Log4J\u8fdb\u884c\u8f93\u51fa\u3002
\n\uff08\u56e0\u4e3aQiita\u65e0\u6cd5\u7c98\u8d34Java\uff0c\u8bf7\u4f7f\u7528pastebin\uff09
\nhttps:\/\/pastebin.com\/mEtekHPf<\/p>\n

\u76ee\u6807\u7cfb\u7edf<\/h1>\n

\u30d0\u30fc\u30b8\u30e7\u30f32.0\u304b\u30892.14.1\u307e\u3067\u306eLog4J\u306b\u5f71\u97ff\u3057\u307e\u3059\u3002
\n\u4ee5\u4e0b\u306e\u6761\u4ef6\u304c\u63c3\u3063\u3066\u3044\u308b\u3068\u3001\u4efb\u610f\u306e\u30d7\u30ed\u30b0\u30e9\u30e0\u3092\u5b9f\u884c\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002
\n\u30fb\u653b\u6483\u8005\u304c\u4efb\u610f\u306e\u30c7\u30fc\u30bf\u3092\u9001\u4fe1\u3067\u304d\u308b\u30d7\u30ed\u30c8\u30b3\u30eb\u3092\u5099\u3048\u305f\u30ea\u30e2\u30fc\u30c8\u30a2\u30af\u30bb\u30b9\u53ef\u80fd\u306a\u30a8\u30f3\u30c9\u30dd\u30a4\u30f3\u30c8
\n\u30fb\u653b\u6483\u8005\u304c\u30a8\u30f3\u30c9\u30dd\u30a4\u30f3\u30c8\u306b\u9001\u4fe1\u3057\u305f\u4efb\u610f\u306e\u30c7\u30fc\u30bf\u3092Log4J\u3092\u4ecb\u3057\u3066\u8a18\u9332\u3059\u308b\u3053\u3068<\/p>\n

\u8bf7\u5bf9\u4e0b\u8ff0\u5185\u5bb9\u8fdb\u884c\u4e2d\u6587\u672c\u5730\u5316\u7684\u91ca\u4e49\uff0c\u53ea\u9700\u63d0\u4f9b\u4e00\u79cd\u7ffb\u8bd1\u9009\u9879\uff1a<\/h2>\n

Minecraft\u670d\u52a1\u5668<\/p>\n

Minecraft\u6e38\u620f\u5728\u5ba2\u6237\u7aef\u548c\u670d\u52a1\u5668\u53cc\u65b9\u90fd\u4f7f\u7528\u4e86Log4J\u3002
\n\u56e0\u6b64\uff0c\u5f53\u5411Minecraft\u804a\u5929\u4e2d\u53d1\u9001Lookup\u7684\u5b57\u7b26\u4e32\u65f6\uff0c\u53ef\u80fd\u4f1a\u5728\u670d\u52a1\u5668\u7aef\u548c\u5176\u4ed6\u5ba2\u6237\u7aef\u4e0a\u6267\u884c\u6076\u610f\u7a0b\u5e8f\u3002<\/p>\n

\u7f51\u7edc\u670d\u52a1\u5668<\/h2>\n

\u4f8b\u3068\u3057\u3066\u3001\u30d5\u30a9\u30fc\u30e0\u3067\u5165\u529b\u3055\u308c\u305f\u6587\u5b57\u5217\u3092Log4J\u3092\u7528\u3044\u3066\u51fa\u529b\u3059\u308b\u3088\u3046\u306b\u3055\u308c\u3066\u3044\u308b\u5834\u5408\u3001\u30d5\u30a9\u30fc\u30e0\u306bLookup\u306e\u6587\u5b57\u5217\u3092\u9001\u4fe1\u3059\u308b\u3068\u3001\u30b5\u30fc\u30d0\u30fc\u5074\u3067\u60aa\u610f\u306e\u3042\u308b\u30d7\u30ed\u30b0\u30e9\u30e0\u304c\u5b9f\u884c\u3055\u308c\u308b\u3068\u8003\u3048\u3089\u308c\u308b\u3002<\/p>\n

\u89e3\u51b3\u65b9\u6cd5 ‘\u00e0n)<\/h1>\n

\u4f7f\u7528\u66f4\u65b0\u540e\u7684Log4J<\/h2>\n

\u7531\u4e8eLog4j 2.15.0\u5df2\u7ecf\u5b9e\u65bd\u4e86\u9632\u62a4\u63aa\u65bd\uff0c\u901a\u8fc7\u8fdb\u884c\u66f4\u65b0\u53ef\u4ee5\u9632\u6b62\u5229\u7528\u6f0f\u6d1e\u7684\u884c\u4e3a\u3002<\/p>\n

\u7981\u7528Lookup\u529f\u80fd\u7684JVM\u53c2\u6570<\/h2>\n

\u5982\u679c\u5c06-Dlog4j2.formatMsgNoLookups=true\u4f5c\u4e3aJVM\u53c2\u6570\u8fdb\u884c\u8bbe\u7f6e\uff0c\u5c06\u4f1a\u7981\u7528Lookup\u64cd\u4f5c\u5e76\u4e14\u7a0b\u5e8f\u5c06\u4e0d\u4f1a\u6267\u884c\u3002
\n\u9700\u8981\u6ce8\u610f\u7684\u662f\uff0c\u5982\u679c\u7c7b\u4f3c\u4e8eMinecraft\u670d\u52a1\u5668\u8fd9\u6837\u7684\u5ba2\u6237\u7aef\u4e5f\u5728\u4f7f\u7528Log4J\uff0c\u90a3\u4e48\u4ec5\u4ec5\u5728\u670d\u52a1\u5668\u7aef\u91c7\u53d6\u63aa\u65bd\u662f\u65e0\u6cd5\u963b\u6b62\u5ba2\u6237\u7aef\u6267\u884c\u7684\u3002<\/p>\n

\u901a\u8fc7\u7981\u7528Log4J\u914d\u7f6e\u6587\u4ef6\u4e2d\u7684Lookup\u673a\u5236<\/h2>\n

\u82e5\u5c06\u8f93\u51fa\u6a21\u5f0f\u8bbe\u7f6e\u5982\u4e0b\uff0c\u5219\u7981\u7528\u4e86\u67e5\u627e\u529f\u80fd\u3002\u53ef\u4ee5\u901a\u8fc7\u66ff\u6362jar\u6587\u4ef6\u5185\u7684\u914d\u7f6e\u6587\u4ef6\u6216\u8005\u5728\u8fd0\u884c\u65f6\u901a\u8fc7\u7c7b\u4f3c\u4e8e-Dlog4j.configurationFile=log4j2.xml\u7684\u6807\u5fd7\u6307\u5b9a\u3002<\/p>\n

<PatternLayout pattern=\"[%d{HH:mm:ss}] [%t\/%level]: %msg{nolookups}%n\"\/>\r\n<\/code><\/pre>\n
Log4j \u914d\u7f6e\u6587\u4ef6\u7684\u6587\u6863<\/p>\n
\u51fa\u5904\u548c\u53c2\u8003\u6765\u6e90<\/h1>\n
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