14 DAY TRIAL // On March 14, Canonical published in a security notice details about an NSPR update for its Ubuntu 12.10, Ubuntu 12.04 LTS, Ubuntu 11.10, and Ubuntu 10.04 LTS operating systems.
According to Canonical, NSPR was updated in order to work with the new NSS. A previous fix, USN-1763-1, repaired a vulnerability in NSS. This update provides the NSPR version needed to use the new NSS.
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 libnss3 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. After a standard system update, you need to restart any applications that use NSPR, such as Evolution and Chromium, to make all the necessary changes.