The Java Web Start Installer in Sun Java SE in JDK and JRE 6 before Update 17 does not properly use security model permissions when removing installer extensions, which allows remote attackers to execute arbitrary code by modifying a certain JNLP file to have a URL field that points to an unintended trusted application, aka Bug Id 6872824.
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A6635
http://zerodayinitiative.com/advisories/ZDI-09-077/
http://www.vupen.com/english/advisories/2009/3131
http://www.securityfocus.com/bid/36881
http://www.redhat.com/support/errata/RHSA-2009-1694.html
http://support.apple.com/kb/HT3970
http://support.apple.com/kb/HT3969
http://sunsolve.sun.com/search/document.do?assetkey=1-66-269870-1
http://security.gentoo.org/glsa/glsa-200911-02.xml
http://secunia.com/advisories/37841
http://secunia.com/advisories/37581
http://secunia.com/advisories/37386
http://secunia.com/advisories/37239
http://secunia.com/advisories/37231
http://marc.info/?l=bugtraq&m=134254866602253&w=2
http://lists.opensuse.org/opensuse-security-announce/2009-11/msg00010.html
http://lists.apple.com/archives/security-announce/2009/Dec/msg00001.html
http://lists.apple.com/archives/security-announce/2009/Dec/msg00000.html