USN-2903-2: NSS regression

23 February 2016

nss regression

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

  • Ubuntu 12.04 LTS


USN-2903-1 introduced a regression in NSS.

Software Description

  • nss - Network Security Service library


USN-2903-1 fixed a vulnerability in NSS. An incorrect package versioning change in Ubuntu 12.04 LTS caused a regression when building software against NSS. This update fixes the problem.

We apologize for the inconvenience.

Original advisory details:

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 12.04 LTS
libnss3-dev - 2:3.21-0ubuntu0.12.04.2

To update your system, please follow these instructions:

In general, a standard system update will make all the necessary changes.