14 DAY TRIAL // On September 24, in a security notice, Canonical published details about a Samba vulnerability in its Ubuntu 13.04, Ubuntu 12.10, Ubuntu 12.04 LTS, and Ubuntu 10.04 LTS operating system.
According to Canonical, Samba could have been made to hang if it received specially crafted network traffic.
It has been discovered that Samba incorrectly handled certain extended attribute lists. A remote attacker could have used this issue to cause Samba to hang, 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 samba packages, 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.