Mobile code: invoking untrusted mobile code

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This is an Attack. To view all attacks, please see the Attack Category page.

ASDR Table of Contents


This attack consists on manipulation of a mobile code in order to execute malicious operations at the client side. By intercepting client traffic using the man-in-the-middle technique, a malicious user could modify the original mobile code with arbitrary operations that will be executed on the client’s machine under his credentials. In another scenario, the malicious mobile code could be hosted in an untrustworthy web site or it could be permanently injected on a vulnerable web site through an injection attack. This attack can be performed over Java or C++ applications and affects any operating system.

Risk Factors



The following code demonstrates how this attack could be performed using a Java applet.

 // here declarer a object URL with the path of the malicious class
 URL[] urlPath= new URL[]{new URL("file:subdir/")};

 // here generate a object “loader” which is responsible to load a class in the URL path
 URLClassLoader  classLoader = new URLClassLoader(urlPath); 

 //here declare a object of a malicious class contained in “classLoader”
 Class loadedClass = Class.forName("loadMe", true, classLoader);<br><br>

Related Threat Agents

  • TBD

Related Attacks

Related Vulnerabilities

Related Controls

  • To solve this issue, it’s necessary to use some type of integrity mechanism to assure that the mobile code has not been modified.