USN-2159-1: NSS vulnerability

2 April 2014

nss vulnerability

A security issue affects these releases of Ubuntu and its derivatives:

  • Ubuntu 13.10
  • Ubuntu 12.10
  • Ubuntu 12.04 LTS
  • Ubuntu 10.04 LTS


NSS could be made to expose sensitive information over the network.

Software Description

  • nss - Network Security Service library


It was discovered that NSS incorrectly handled wildcard certificates when used with internationalized domain names. If a remote attacker were able to perform a man-in-the-middle attack, this flaw could be exploited to spoof SSL servers.

Update instructions

The problem can be corrected by updating your system to the following package versions:

Ubuntu 13.10
libnss3 - 2:3.15.4-0ubuntu0.13.10.2
Ubuntu 12.10
libnss3 - 3.15.4-0ubuntu0.12.10.2
Ubuntu 12.04 LTS
libnss3 - 3.15.4-0ubuntu0.12.04.2
Ubuntu 10.04 LTS
libnss3-1d - 3.15.4-0ubuntu0.10.04.2

To update your system, please follow these instructions:

After a standard system update you need to restart any applications that use NSS, such as Evolution and Chromium, to make all the necessary changes.