Apple Java for Mac OS X 10.5 before Update 7 and Java for Mac OS X 10.6 before Update 2 do not properly handle mediaLibImage objects, which allows remote attackers to execute arbitrary code or cause a denial of service (out-of-bounds memory access and application crash) via a crafted applet, related to the com.sun.medialib.mlib package.
lists.apple.com/archives/security-announce/2010//May/msg00001.html
lists.apple.com/archives/security-announce/2010//May/msg00002.html
secunia.com/advisories/39819
securitytracker.com/id?1024011
support.apple.com/kb/HT4170
support.apple.com/kb/HT4171
www.securityfocus.com/bid/40238
www.vupen.com/english/advisories/2010/1191