目录

■Eclipse中设定方法

■效果

■扩展 

●2.14.1 存在漏洞

JndiLookup.java

AbstractLookup.java

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■Eclipse中设定方法

　Maven

　　　Download Artifact Sources

■效果

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■扩展 

可以查看查看Log4j2的漏洞，JNDI注入 相关的 源码了。　

●2.14.1 存在漏洞

JndiLookup.java

package org.apache.logging.log4j.core.lookup;

import java.util.Objects;

import javax.naming.NamingException;

import org.apache.logging.log4j.Logger;
import org.apache.logging.log4j.Marker;
import org.apache.logging.log4j.MarkerManager;
import org.apache.logging.log4j.core.LogEvent;
import org.apache.logging.log4j.core.config.plugins.Plugin;
import org.apache.logging.log4j.core.net.JndiManager;
import org.apache.logging.log4j.status.StatusLogger;


@Plugin(name = "jndi", category = StrLookup.CATEGORY)
public class JndiLookup extends AbstractLookup {

    private static final Logger LOGGER = StatusLogger.getLogger();
    private static final Marker LOOKUP = MarkerManager.getMarker("LOOKUP");

    
    static final String CONTAINER_JNDI_RESOURCE_PATH_PREFIX = "java:comp/env/";

    
    @Override
    public String lookup(final LogEvent event, final String key) {
        if (key == null) {
            return null;
        }
        final String jndiName = convertJndiName(key);
        try (final JndiManager jndiManager = JndiManager.getDefaultManager()) {
            return Objects.toString(jndiManager.lookup(jndiName), null);
        } catch (final NamingException e) {
            LOGGER.warn(LOOKUP, "Error looking up JNDI resource [{}].", jndiName, e);
            return null;
        }
    }

    
    private String convertJndiName(final String jndiName) {
        if (!jndiName.startsWith(CONTAINER_JNDI_RESOURCE_PATH_PREFIX) && jndiName.indexOf(':') == -1) {
            return CONTAINER_JNDI_RESOURCE_PATH_PREFIX + jndiName;
        }
        return jndiName;
    }
}

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AbstractLookup.java

package org.apache.logging.log4j.core.lookup;


public abstract class AbstractLookup implements StrLookup {

    
    @Override
    public String lookup(final String key) {
        return lookup(null, key);
    }

}

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●2.15.0 漏洞修复

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