In order to fix the problem, users will have to upgrade the operating system
On February 12, Canonical published in a security notice details about a PostgreSQL vulnerability for its Ubuntu 12.10, Ubuntu 12.04 LTS, Ubuntu 11.10, Ubuntu 10.04 LTS, and Ubuntu 8.04 LTS operating systems.According to Canonical, PostgreSQL could be made to crash if it received specially crafted input.
It was discovered that PostgreSQL incorrectly handled calling a certain internal function with invalid arguments. An authenticated attacker could use this issue to cause PostgreSQL to crash, resulting in a denial of service.
The security flaws can be fixed if you upgrade your system(s) to the latest PostgreSQL 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 not be necessary to implement the changes.