A total of 13 security vulnerabilities are fixed by the Java update. Attackers can use those vulnerabilities for various attacks on a computer system that can lead to privilege escalations.

Probably the easiest way to uninstall old versions of Java and to install the latest secure update is by using the third party software Java RA. Java RA can uninstall old versions of Java. Users should download the latest JRE directly from Sun and install it on their systems. Java Ra should be run after the installation as it will remove all old versions of Java while keeping the latest version installed.

List of vulnerabilities:

• The Java Runtime Environment Creates Temporary Files That Have “Guessable” File Names
• Java Runtime Environment (JRE) Buffer Overflow Vulnerabilities in Processing Image Files and Fonts

May

• Allow Applets or Java Web Start Applications to Elevate Their Privileges
• Multiple Security Vulnerabilities in Java Web Start and Java Plug-in May Allow Privilege Escalation
• The Java Runtime Environment (JRE) “Java Update” Mechanism Does Not Check the Digital Signature of the JRE that it Downloads
• A Buffer Overflow Vulnerability in the Java Runtime Environment (JRE) May Allow Privileges to be Escalated
• A Security Vulnerability in the Java Runtime Environment (JRE) Related to Deserializing Calendar Objects May Allow Privileges to be Escalated
• The Java Runtime Environment UTF-8 Decoder May Allow Multiple Representations of UTF-8 Input
• Security Vulnerability in Java Runtime Environment May Allow Applets to List the Contents of the Current User’s Home Directory
• Security Vulnerability in the Java Runtime Environment With Processing RSA Public Keys
• A Security Vulnerability in Java Runtime Environment (JRE) With Authenticating Users Through Kerberos May Lead to a Denial of Service (DoS)
• Security Vulnerabilities in the Java Runtime Environment (JRE) JAX-WS and JAXB Packages may Allow Privileges to be Escalated
• A Security Vulnerability in Java Runtime Environment (JRE) With Parsing of Zip Files May Allow Reading of Arbitrary Memory Locations
• A Security Vulnerability in the Java Runtime Environment may Allow Code Loaded From the Local Filesystem to Access LocalHost

Users who cannot install the Java update immediately should disable Java for the time being to protect their computer system from the exploits.

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Four different versions of the Java Runtime Environment were installed on my system and JavaRa removed the three versions of JRE that were the oldest from the system. I started by scanning my system for old versions of Java which were removed, then checked if there was a Java update available. I should have done it the other way round because an update was found and a new version of Java was installed on my system.

Which led to the fact that the previously newest version was not the newest anymore so I had to run the cleanup process again to remove that version. The best way to use the application is therefor to run the Update first and check for old versions once the software has checked for and installed possible updates.

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