ZDI-09-077: Sun Java Web Start Arbitrary Command Execution Vulnerability
http://www.zerodayinitiative.com/advisories/ZDI-09-077 
November 4, 2009

-- Affected Vendors:
Sun Microsystems

-- Affected Products:
Sun Microsystems Java Runtime

-- TippingPoint(TM) IPS Customer Protection:
TippingPoint IPS customers have been protected against this
vulnerability by Digital Vaccine protection filter ID 9241. 
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http://www.tippingpoint.com 

-- Vulnerability Details:
This vulnerability allows remote attackers to execute arbitrary code on
vulnerable installations of Sun Java WebStart. User interaction is
required to exploit this vulnerability in that the target must visit a
malicious page or open a malicious file.

The specific flaw exists in the implementation of security model
permissions during the removal of installer extensions. By modifying an
existing installer extension JNLP file, a condition occurs that allows
for code supplied by a different URL than the original installer
extension URL to run as a secure applet. This condition can result in
arbitrary command injection under the privileges of the currently logged
in user.

-- Vendor Response:
Sun Microsystems has issued an update to correct this vulnerability. More
details can be found at:

http://sunsolve.sun.com/search/document.do?assetkey=1-66-269870-1 

-- Disclosure Timeline:
2009-08-17 - Vulnerability reported to vendor
2009-11-04 - Coordinated public release of advisory

-- Credit:
This vulnerability was discovered by:
    * Peter Csepely

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