The encoder in Sun Java SE 6 before Update 15, and OpenJDK, grants read access to private variables with unspecified names, which allows context-dependent attackers to obtain sensitive information via an untrusted (1) applet or (2) application.
java.sun.com/javase/6/webnotes/6u15.html
lists.apple.com/archives/security-announce/2009/Sep/msg00000.html
lists.opensuse.org/opensuse-security-announce/2009-10/msg00001.html
secunia.com/advisories/36162
secunia.com/advisories/36176
secunia.com/advisories/36180
secunia.com/advisories/37386
security.gentoo.org/glsa/glsa-200911-02.xml
sunsolve.sun.com/search/document.do?assetkey=1-21-125139-16-1
www.mandriva.com/security/advisories?name=MDVSA-2009:209
www.vupen.com/english/advisories/2009/2543
bugzilla.redhat.com/show_bug.cgi?id=513223
oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A9443
rhn.redhat.com/errata/RHSA-2009-1200.html
rhn.redhat.com/errata/RHSA-2009-1201.html
www.redhat.com/archives/fedora-package-announce/2009-August/msg00310.html
www.redhat.com/archives/fedora-package-announce/2009-August/msg00325.html