Check Point Advisories

Sun Java Web Start JNLP java-vm-args Heap Buffer Overflow (CVE-2008-3111)

Check Point Reference: CPAI-2008-320
Date Published: 3 Mar 2010
Severity: High
Last Updated: Wednesday 03 March, 2010
Source:
Industry Reference:CVE-2008-3111
Protection Provided by:

Security Gateway
R81, R80, R77, R75
Who is Vulnerable?
Vulnerability Description The Sun Java Web Start is a component of the Java 2 Runtime Environment (JRE). It allows for the network deployment of Java applications. This component enables stand-alone Java applications to be downloaded from a remote network location and invoked on a target machine. There exists a heap buffer overflow vulnerability in Sun Java Web Start. The vulnerability is due to an improper bound checking while handling XML based JNLP files. A remote unauthenticated attacker can exploit this vulnerability by enticing the target user to open a crafted JNLP file, causing arbitrary code to be injected and executed in the security context of the current user. In case of an attack where code execution is successful, the behavior of the target host is entirely dependent on the intended function of the injected code. In such a case, the injected code will be executed within the context of the currently logged in user. In case of an attack where code execution is unsuccessful, the Java Web Start application will terminate unexpectedly.

Protection Overview

This protection will detect and block attempts to exploit this vulnerability.

In order for the protection to be activated, update your Security Gateway product to the latest IPS update. For information on how to update IPS, go to SBP-2006-05, click on Protection tab and select the version of your choice.

Security Gateway R80 / R77 / R75

  1. In the IPS tab, click Protections and find the Sun Java Web Start JNLP java-vm-args Heap Buffer Overflow protection using the Search tool and Edit the protection's settings.
  2. Install policy on all Security Gateways.

This protection's log will contain the following information:

Attack Name:  Content Protection Violation.
Attack Information:  Sun Java Web Start JNLP java-vm-args heap buffer overflow

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