USN-1687-1: NSS vulnerability

14 January 2013

nss vulnerability

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

  • Ubuntu 12.10
  • Ubuntu 12.04 LTS
  • Ubuntu 11.10
  • Ubuntu 10.04 LTS


Fraudulent security certificates could allow sensitive information to be exposed when accessing the Internet.

Software Description

  • nss - Network Security Service library


Two intermediate CA certificates were mis-issued by the TURKTRUST certificate authority. If a remote attacker were able to perform a man-in-the-middle attack, this flaw could be exploited to view sensitive information.

Update instructions

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

Ubuntu 12.10
libnss3-1d - 3.14.1-0ckbi1.93ubuntu.
Ubuntu 12.04 LTS
libnss3-1d - 3.14.1-0ckbi1.93ubuntu.
Ubuntu 11.10
libnss3-1d - 3.14.1-0ckbi1.93ubuntu.
Ubuntu 10.04 LTS
libnss3-1d - 3.14.1-0ckbi1.93ubuntu.

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.