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TITLE:
Sun Java Web Start Untrusted Application Arbitrary File Overwrite

SECUNIA ADVISORY ID:
SA25823

VERIFY ADVISORY:
http://secunia.com/advisories/25823/

CRITICAL:
Highly critical

IMPACT:
Security Bypass, Manipulation of data

WHERE:
>From remote

SOFTWARE:
Sun Java JDK 1.5.x
http://secunia.com/product/4621/
Sun Java JRE 1.5.x / 5.x
http://secunia.com/product/4228/
Sun Java SDK 1.4.x
http://secunia.com/product/1661/
Sun Java JRE 1.4.x
http://secunia.com/product/784/
Java Web Start 1.x
http://secunia.com/product/1005/

DESCRIPTION:
A vulnerability has been reported in Sun Java Web Start, which can be
exploited by malicious people to bypass certain security
restrictions.

The vulnerability is caused due to an unspecified error in Java Web
Start and can be exploited by an untrusted application to grant
itself permissions to overwrite any file that is writable by the user
running the application. This can further be exploited to overwrite
the user's ".java.policy" file allowing the application to invoke
applets or Java Web Start applications.

The vulnerability affects Java Web Start in JDK and JRE 5.0 Update 11
and earlier and Java Web Start in SDK and JRE 1.4.2_13 and earlier for
the Windows platform.

SOLUTION:
Apply updates.

Java Web Start in JDK and JRE 5.0 Update 12 or later
http://java.sun.com/j2se/1.5.0/download.jsp

Java Web Start in SDK and JRE 1.4.2_14 or later
http://java.sun.com/j2se/1.4.2/download.html

PROVIDED AND/OR DISCOVERED BY:
The vendor credits John Heasman, NGSSoftware

ORIGINAL ADVISORY:
http://sunsolve.sun.com/search/document.do?assetkey=1-26-102957-1

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About:
This Advisory was delivered by Secunia as a free service to help
everybody keeping their systems up to date against the latest
vulnerabilities.

Subscribe:
http://secunia.com/secunia_security_advisories/

Definitions: (Criticality, Where etc.)
http://secunia.com/about_secunia_advisories/


Please Note:
Secunia recommends that you verify all advisories you receive by
clicking the link.
Secunia NEVER sends attached files with advisories.
Secunia does not advise people to install third party patches, only
use those supplied by the vendor.

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