14 DAY TRIAL // On April 23, in a security notice Canonical published details about OpenJDK vulnerabilities for its Ubuntu 12.10 (Quantal Quetzal) operating systems.
According to Canonical, several security issues have been fixed in OpenJDK 7.
For example, a vulnerability has discovered in the OpenJDK JRE related to information disclosure and data integrity. An attacker could exploit this to execute arbitrary code.
Other issues have been found in OpenJDK JRE, related to confidentiality. An attacker could exploit these to expose sensitive data over the network.
For a more detailed description of the security problems, you can visit Canonical's security notification.
Users can simply fix the security flaws by upgrading the operating systems to the openjdk-7-jre-lib, openjdk-7-jre-zero, icedtea-7-jre-jamvm, openjdk-7-jre-headless, and openjdk-7-jre specific to each distribution.
A normal system update, executed with the Update Manager, will implement all the necessary changes. A complete system restart is not necessary, but you will have to restart any Java applications or applets.