14 DAY TRIAL // On July 16, Canonical published, in a security, notice details about IcedTea-Web vulnerabilities for its Ubuntu 12.10, Ubuntu 12.04 LTS, Ubuntu 11.10, and Ubuntu 10.04 LTS operating systems.
According to Canonical, several security issues were fixed in OpenJDK 7.
For example, several vulnerabilities have been discovered in the OpenJDK JRE related to information disclosure and data integrity. An attacker could have exploited these to expose sensitive data over the network.
For a more detailed description of the security problems, you can visit Canonical's security notification.
The security flaws can be fixed if you upgrade your system(s) to the latest openjdk package, specific to each distribution. To apply the update, run the Update Manager application.
In general, a standard system update will make all the necessary changes. A system restart will be necessary to implement the changes.