Unspecified vulnerability in the Java Runtime Environment (JRE) component in Oracle Java SE 7 Update 21 and earlier and 6 Update 45 and earlier allows remote attackers to affect integrity via vectors related to JMX.  NOTE: the previous information is from the June 2013 CPU. Oracle has not commented on claims from another vendor that this issue is due to a missing check for "package access" by the MBeanServer Introspector.