ZDI-08-043: Sun Java Web Start vm args Stack Buffer Overflow
http://www.zerodayinitiative.com/advisories/ZDI-08-043
July 17, 2008

-- Affected Vendors:
Sun Microsystems

-- Affected Products:
Sun Microsystems Java Runtime

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TippingPoint IPS customers have been protected against this
vulnerability by Digital Vaccine protection filter ID 6013. 
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-- Vulnerability Details:
This vulnerability allows remote attackers to execute arbitrary code on
vulnerable installations of Sun Java Web Start. User interaction is
required to exploit this vulnerability in that the target must visit a
malicious page.

The specific flaw exists in the GetVMArgsOption() function used while
parsing the java-vm-args attribute of the j2se tag in xml based JNLP
files. When a user downloads a malicious JNLP file, the vulnerable
attribute is read into a static buffer. If an overly long value is
defined by the java-vm-args attribute, a stack based buffer overflow
occurs, resulting in an exploitable condition.


-- 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=1-26-238905-1

-- Disclosure Timeline:
2008-01-17 - Vulnerability reported to vendor
2008-07-17 - Coordinated public release of advisory

-- Credit:
This vulnerability was discovered by:
    * Anonymous

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