14 DAY TRIAL // A number of OpenJDK 6 vulnerabilities have been identified and repaired in the Ubuntu 12.04 LTS and Ubuntu 10.04 LTS operating systems by Canonical developers.
Only those two operating systems have been affected by these problems, because Ubuntu 14.04 LTS is using a newer iteration of OpenJDK.
“Several vulnerabilities were discovered in the OpenJDK JRE related to information disclosure, data integrity and availability. An attacker could exploit these to cause a denial of service or expose sensitive data over the network,” reads the security notification.
Also, “several vulnerabilities were discovered in the OpenJDK JRE related to information disclosure and data integrity. An attacker could exploit these to expose sensitive data over the network.”
For a more detailed description of the problems, you can see Canonical's security notification. Users are advised to upgrade their systems as soon as possible.
The flaws can be fixed if you upgrade your system(s) to the latest packages specific to each distribution. To apply the patch, run the Update Manager application.
It's also possible to update the operating system from a terminal and you will have to be root in order to do it. You only need to enter the following commands in a terminal:
sudo apt-get dist-upgrade