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Updated java-1.6.0-sun packages that correct several security issues are now available for Red Hat Enterprise Linux 4 Extras and 5 Supplementary. This update has been rated as having critical security impact by the Red Hat Security Response Team. The Java Runtime Environment (JRE) contains the software and tools that users need to run applets and applications written using the Java programming language. A vulnerability was found in the Java Management Extensions (JMX) management agent, when local monitoring is enabled. This allowed remote attackers to perform illegal operations. (CVE-2008-3103) Multiple vulnerabilities with unsigned applets were reported. A remote attacker could misuse an unsigned applet to connect to localhost services running on the host running the applet. (CVE-2008-3104) Several vulnerabilities in the Java API for XML Web Services (JAX-WS) client and service implementation were found. A remote attacker who caused malicious XML to be processed by a trusted or untrusted application was able access URLs or cause a denial of service. (CVE-2008-3105, CVE-2008-3106) A JRE vulnerability could be triggered by an untrusted application or applet. A remote attacker could grant an untrusted applet or application extended privileges such as being able to read and write local files, or execute local programs. (CVE-2008-3107) Several vulnerabilities within the JRE scripting support were reported. A remote attacker could grant an untrusted applet extended privileges such as reading and writing local files, executing local programs, or querying the sensitive data of other applets. (CVE-2008-3109, CVE-2008-3110) A vulnerability in Java Web Start was found. A remote attacker was able to create arbitrary files with the permissions of the user running the untrusted Java Web Start application. (CVE-2008-3112) Another vulnerability in Java Web Start when processing untrusted applications was reported. An attacker was able to acquire sensitive information, such as the cache location. (CVE-2008-3114) Users of java-1.6.0-sun should upgrade to these updated packages, which correct these issues.