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Mobile code: invoking untrusted mobile code

Revision as of 13:47, 3 October 2007 by Nsrav (talk | contribs)

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


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


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 threats

Category: Logical Attacks

Related Attacks

Related Vulnerabilities

Category: Unsafe Mobile Code

Related Countermeasures

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


Category: Resource Manipulation

Category: Abuse of Functionality

Category: Exploitation of Privilege/Trust