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ZDI-08-042: Sun Java Web Start Sandbox Bypass Vulnerability
From: zdi-disclosures () 3com com
Date: Thu, 17 Jul 2008 14:17:22 -0500

ZDI-08-042: Sun Java Web Start Sandbox Bypass Vulnerability
http://www.zerodayinitiative.com/advisories/ZDI-08-042
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 6251, 6252, 5527. 
For further product information on the TippingPoint IPS, visit:

    http://www.tippingpoint.com

-- 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 writeManifest() method of the CacheEntry
class. A directory traversal flaw in this method allows the creation of
arbitrary files on the target system. After the file has been created, a
call to Runtime.getRuntime.exec() can be used to execute the file.

-- 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:
2008-05-05 - Vulnerability reported to vendor
2008-07-17 - Coordinated public release of advisory

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

-- About the Zero Day Initiative (ZDI):
Established by TippingPoint, The Zero Day Initiative (ZDI) represents 
a best-of-breed model for rewarding security researchers for responsibly
disclosing discovered vulnerabilities.

Researchers interested in getting paid for their security research
through the ZDI can find more information and sign-up at:

    http://www.zerodayinitiative.com

The ZDI is unique in how the acquired vulnerability information is
used. TippingPoint does not re-sell the vulnerability details or any
exploit code. Instead, upon notifying the affected product vendor,
TippingPoint provides its customers with zero day protection through
its intrusion prevention technology. Explicit details regarding the
specifics of the vulnerability are not exposed to any parties until
an official vendor patch is publicly available. Furthermore, with the
altruistic aim of helping to secure a broader user base, TippingPoint
provides this vulnerability information confidentially to security
vendors (including competitors) who have a vulnerability protection or
mitigation product.

Our vulnerability disclosure policy is available online at:

    http://www.zerodayinitiative.com/advisories/disclosure_policy/

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