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Sun Java Plug-in Sandbox Security Bypass Vulnerability Advisory Available in Danish 

Secunia Advisory: SA13271  
Release Date: 2004-11-23
Last Update: 2005-01-10

Critical:
Highly critical
Impact: System access
Where: From remote
Solution Status: Vendor Patch

Software:Sun Java JRE 1.3.x
Sun Java JRE 1.4.x
Sun Java SDK 1.3.x
Sun Java SDK 1.4.x

CVE reference:CVE-2004-1029 (Secunia mirror)

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Description:
Jouko Pynnonen has reported a vulnerability in Sun Java Plug-in, which can be exploited by malicious people to compromise a user's system.

The vulnerability is caused due to a design error, as JavaScript code can create and transfer objects to untrusted applets for some private and restricted classes used internally by the Java Virtual Machine (JVM).

This can e.g. be exploited by a malicious web site to turn off the Java security manager and disable the sandbox restrictions for untrusted applets.

The vulnerability has been reported in SDK / JRE version 1.4.2_05 and prior, all 1.4.1 and 1.4.0 versions, and version 1.3.1_12 and prior.

NOTE: Marc Schoenefeld has also reported a vulnerability in version 1.4.2_05 within the serialization APIs, which can be exploited to consume a large amount of CPU resources on a remote JVM.

Do you have this product installed on your home computer? Scan using the free Personal Software Inspector. Check if a vulnerable version is installed on computers in your corporate network, scan using the Network Software Inspector.

Solution:
The vulnerability has been fixed in the following versions:
* SDK / JRE 1.4.2_06 and later.
* SDK / JRE 1.3.1_13 and later.

Provided and/or discovered by:
Jouko Pynnonen

Changelog:
2004-11-24: Added link to US-CERT vulnerability note.
2004-11-30: Added note about another fixed vulnerability.
2005-01-10: Added link to Sun Microsystems advisory describing issue reported by Marc Schoenefeld.

Original Advisory:
Sun Microsystems:
http://sunsolve.sun.com/search/document.do?assetkey=1-26-57591-1
http://sunsolve.sun.com/search/document.do?assetkey=1-26-57707-1

iDEFENSE:
http://www.idefense.com/application/poi/display?id=158&type=vulnerabilities

Other References:
US-CERT VU#760344:
http://www.kb.cert.org/vuls/id/760344



Please note: The information that this Secunia Advisory is based on comes from a third party unless stated otherwise.

Secunia collects, validates, and verifies all vulnerability reports issued by security research groups, vendors, and others.

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