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Assessing Java clients with the BeanShell
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SUMMARY
Assessing the security of Java applications, and particularly
client-server applications, can be a tedious process of modifying the
code, compiling, deploying, testing and repeat. This becomes even more
difficult when the source code to the application is not available. What
we require is an easy means of interacting with the internals of a Java
application during execution without recompiling the code. The
<http://www.beanshell.org> BeanShell provides an interpreted, scripting
environment that can plug in to any Java application or applet and allows
users to inspect and manipulate objects dynamically. This paper
demonstrates a technique for using the BeanShell to assess the security of
a typical Java client-server application.
DETAILS
Conclusion:
The BeanShell provides a convenient means of inspecting and manipulating a
Java application during execution. This allows the security tester to
bypass security controls on the client and verify the security controls on
the server. It also allows for the automation of tedious tests such as
brute force testing.
The BeanShell can be inserted into a new application in a few simple
steps. If the source code is not available, the BeanShell can be inserted
by extending the class that acts as the entry point into the application.
These techniques apply equally to full blown Java applications as well as
applets.
ADDITIONAL INFORMATION
The information has been provided by Stephen de Vries.
The original article can be found at:
<http://www.corsaire.com/white-papers/060816-assessing-java-clients-with-the-beanshell.pdf>
http://www.corsaire.com/white-papers/060816-assessing-java-clients-with-the-beanshell.pdf
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