VUPEN Security Research - Sun Java JDK/JRE Unpack200 Buffer Overflow 
Vulnerability

http://www.vupen.com/english/research.php


I. BACKGROUND
---------------------

"Java is a programming language and computing platform released by
Sun Microsystems. It is the underlying technology that powers
state-of-the-art programs including utilities, games, and business
applications.

Java runs on more than 850 million personal computers worldwide,
and on billions of devices worldwide, including mobile and TV devices."


II. DESCRIPTION
--------------------- 

VUPEN Vulnerability Research Team discovered a vulnerability in
Sun Java JDK/JRE.

The flaw is caused by a buffer overflow error within the Unpack200
component when processing malformed data, which could be exploited by
attackers to execute arbitrary code via a malicious archive.


III. AFFECTED PRODUCTS
--------------------------------

Sun Java JDK version 6 Update 18 and prior
Sun Java JDK version 5.0 Update 23 and prior
Sun Java JRE version 6 Update 18 and prior
Sun Java JRE version 5.0 Update 23 and prior
Sun Java JRE version 1.4.2_25 and prior


IV. Exploits - PoCs & Binary Analysis
----------------------------------------

In-depth binary analysis of the vulnerability and a proof-of-concept
have been released by VUPEN through the VUPEN Binary Analysis
& Exploits Service :

http://www.vupen.com/exploits


V. SOLUTION
---------------- 

Upgrade to Sun Java JDK and JRE 6 Update 19, JDK and JRE 5.0 Update 24,
and JRE and SDK version 1.4.2_26 :
http://www.oracle.com/technology/deploy/security/critical-patch-updates/javacpumar2010.html


VI. CREDIT
-------------- 

The vulnerability was discovered by Sebastien Renaud of VUPEN Security


VII. ABOUT VUPEN Security
---------------------------------

VUPEN is a leading IT security research company providing vulnerability
management and security intelligence solutions which enable enterprises
and institutions to eliminate vulnerabilities before they can be exploited,
ensure security policy compliance and meaningfully measure and manage risks.

Governmental and federal agencies, and global enterprises in the financial
services, insurance, manufacturing and technology industries rely on VUPEN
to improve their security, prioritize resources, cut time and costs, and
stay ahead of the latest threats.

* VUPEN Vulnerability Notification Service:

http://www.vupen.com/english/services

* VUPEN Binary Analysis & Exploits Service :

http://www.vupen.com/exploits


VIII. REFERENCES
----------------------

http://www.vupen.com/english/advisories/2010/0747
http://www.oracle.com/technology/deploy/security/critical-patch-updates/javacpumar2010.html



IX. DISCLOSURE TIMELINE
----------------------------------- 

2009-10-22 - Vendor notified
2009-10-23 - Vendor response
2009-11-18 - Status update received
2010-01-06 - Status update received
2010-03-03 - Status update received
2010-03-31 - Coordinated public Disclosure