14 DAY TRIAL // On March 7, in a security notice Canonical published details about OpenJDK 7 vulnerabilities for its Ubuntu 12.10 (Quantal Quetzal) operating systems.
According to Canonical, OpenJDK could be made to crash or run programs as you login if it opened a specially crafted file.
USN-1755-1 fixed vulnerabilities in OpenJDK 6. This update provides the corresponding updates for OpenJDK 7.
It was discovered that OpenJDK did not properly validate certain types of images. A remote attacker could exploit this to cause OpenJDK to crash.
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 latest openjdk package, 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 need to restart any applications using OpenJDK, such as your browser.