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TITLE:
Sun Java JRE Web Start JNLP File Processing Buffer Overflow

SECUNIA ADVISORY ID:
SA25981

VERIFY ADVISORY:
http://secunia.com/advisories/25981/

CRITICAL:
Highly critical

IMPACT:
System access

WHERE:
>From remote

SOFTWARE:
Sun Java JRE 1.6.x / 6.x
http://secunia.com/product/12878/
Sun Java JRE 1.5.x / 5.x
http://secunia.com/product/4228/
Java Web Start 1.x
http://secunia.com/product/1005/

DESCRIPTION:
Daniel Soeder has reported a vulnerability in Sun Java JRE, which can
be exploited by malicious people to compromise a user's system.

The vulnerability is caused due to a boundary error within the Java
Web Start component (javaws.exe) when processing JNLP files. This can
be exploited to cause a stack-based buffer overflow via a specially
crafted JNLP file with an overly long codebase attribute.

Successful exploitation allows execution of arbitrary code e.g. when
a user visits a malicious website.

The vulnerability is reported in the following versions:
* Java Runtime Environment 6 Update 1 and earlier
* Java Runtime Environment 5 Update 11, and earlier

SOLUTION:
Apply updates.

JRE 5 Update 12:
http://java.sun.com/javase/downloads/index_jdk5.jsp

JRE 6 Update 2:
http://java.sun.com/javase/downloads/index.jsp

PROVIDED AND/OR DISCOVERED BY:
Daniel Soeder, eEye Digital Security

ORIGINAL ADVISORY:
http://research.eeye.com/html/advisories/published/AD20070705.html

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