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Secunia Research: Mozilla Firefox Java Applet Loading Vulnerability
From: Secunia Research <remove-vuln () secunia com>
Date: Fri, 12 Jun 2009 09:33:55 +0200

====================================================================== 

                     Secunia Research 12/06/2009

        - Mozilla Firefox Java Applet Loading Vulnerability -

====================================================================== 
Table of Contents

Affected Software....................................................1
Severity.............................................................2
Vendor's Description of Software.....................................3
Description of Vulnerability.........................................4
Solution.............................................................5
Time Table...........................................................6
Credits..............................................................7
References...........................................................8
About Secunia........................................................9
Verification........................................................10

====================================================================== 
1) Affected Software 

* Firefox 3.0.7, 3.0.8, and 3.0.9 for Windows with JRE 6 Update 13

NOTE: Other versions may also be affected.

====================================================================== 
2) Severity 

Rating: Highly critical
Impact: System compromise
Where:  Remote

====================================================================== 
3) Vendor's Description of Software 

"The award-winning Firefox Web browser has security, speed and new 
features that will change the way you use the Web. Don’t settle for 
anything less.".

Product Link:
http://www.mozilla.com/firefox/

====================================================================== 
4) Description of Vulnerability

Secunia Research has discovered a vulnerability in Firefox, which can
be exploited by malicious people to potentially compromise a user's 
system.

The vulnerability is caused due to a race condition when accessing the
private data of an NPObject JS wrapper class object if navigating away
from a web page while loading a Java applet. This can be exploited via
a specially crafted web page to use already freed memory.

Successful exploitation may allow execution of arbitrary code.

====================================================================== 
5) Solution 

Update to version 3.0.11.

====================================================================== 
6) Time Table 

26/03/2009 - Vendor notified.
01/04/2009 - Vendor notified (2nd attempt).
01/04/2009 - Vendor response.
12/06/2009 - Public disclosure.

====================================================================== 
7) Credits 

Discovered by Jakob Balle and Carsten Eiram, Secunia Research.

====================================================================== 
8) References

The Common Vulnerabilities and Exposures (CVE) project has assigned 
CVE-2009-1837 for the vulnerability.

====================================================================== 
9) About Secunia

Secunia offers vulnerability management solutions to corporate
customers with verified and reliable vulnerability intelligence
relevant to their specific system configuration:

http://secunia.com/advisories/business_solutions/

Secunia also provides a publicly accessible and comprehensive advisory
database as a service to the security community and private 
individuals, who are interested in or concerned about IT-security.

http://secunia.com/advisories/

Secunia believes that it is important to support the community and to
do active vulnerability research in order to aid improving the 
security and reliability of software in general:

http://secunia.com/secunia_research/

Secunia regularly hires new skilled team members. Check the URL below
to see currently vacant positions:

http://secunia.com/corporate/jobs/

Secunia offers a FREE mailing list called Secunia Security Advisories:

http://secunia.com/advisories/mailing_lists/

====================================================================== 
10) Verification 

Please verify this advisory by visiting the Secunia website:
http://secunia.com/secunia_research/2009-19/

Complete list of vulnerability reports published by Secunia Research:
http://secunia.com/secunia_research/

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