14 DAY TRIAL // Ubuntu 14.10, Ubuntu 14.04 LTS, Ubuntu 12.04 LTS, and Ubuntu 10.04 LTS have been updated in order to repair a few Apache HTTP Server vulnerabilities that have been identified.
The Apache HTTP Server issues are not all that dangerous, but that doesn't mean that users should not upgrade their systems as soon as they are able to do so.
"Mark Montague discovered that the mod_cache module incorrectly handled empty HTTP Content-Type headers. A remote attacker could use this issue to cause the server to stop responding, leading to a denial of service. This issue only affected Ubuntu 14.04 LTS and Ubuntu 14.10," the official notification reads.
This is just one of problems identified and fixed in all the supported Ubuntu OSes. For a more detailed description of the issues, you can see Canonical's security notification. Users have been advised to upgrade their systems as soon as possible.
In general, a standard system update will make all the necessary changes and rebooting the system in order to complete the updating process is not necessary.
You can also use the terminal to update the system. Just enter these commands in a terminal near you:
sudo apt-get dist-upgrade