ZDI-08-043: Sun Java Web Start vm args Stack Buffer Overflow Jul 17 2008 07:17PM
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ZDI-08-043: Sun Java Web Start vm args Stack Buffer Overflow


July 17, 2008

-- 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 6013.

For further product information on the TippingPoint IPS, visit:


-- 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:


-- 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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