USN-2903-1: NSS vulnerability

17 February 2016

nss vulnerability

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

  • Ubuntu 15.10
  • Ubuntu 14.04 LTS
  • Ubuntu 12.04 LTS


NSS could be made to expose sensitive information.

Software Description

  • nss - Network Security Service library


Hanno Böck discovered that NSS incorrectly handled certain division functions, possibly leading to cryptographic weaknesses. (CVE-2016-1938)

This update also refreshes the NSS package to version 3.21 which includes the latest CA certificate bundle, and removes the SPI CA.

Update instructions

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

Ubuntu 15.10
libnss3 - 2:3.21-0ubuntu0.15.10.1
Ubuntu 14.04 LTS
libnss3 - 2:3.21-0ubuntu0.14.04.1
Ubuntu 12.04 LTS
libnss3 - 2:3.21-0ubuntu0.12.04.1

To update your system, please follow these instructions:

This update uses a new upstream release, which includes additional bug fixes. 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.