14 DAY TRIAL // On June 13, Canonical published in a security notice details about a DBus vulnerability for its Ubuntu 13.04, Ubuntu 12.10, and Ubuntu 12.04 LTS operating systems.
According to Canonical, DBus could have been made to crash, if it received specially crafted input.
It was discovered that DBus incorrectly handled certain messages. A local attacker could use this issue to cause system services to crash, resulting in a denial of service.
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 libdbus-1-3 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.