USN-2343-1: NSS vulnerability

9 September 2014

nss vulnerability

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

  • Ubuntu 14.04 LTS
  • Ubuntu 12.04 LTS
  • Ubuntu 10.04 LTS


NSS could be made to crash or run programs as your login if it processed a specially crafted certificate.

Software Description

  • nss - Network Security Service library


Tyson Smith and Jesse Schwartzentruber discovered that NSS contained a race condition when performing certificate validation. An attacker could use this issue to cause NSS to crash, resulting in a denial of service, or possibly execute arbitrary code.

Update instructions

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

Ubuntu 14.04 LTS
libnss3 - 2:3.15.4-1ubuntu7.1
Ubuntu 12.04 LTS
libnss3 - 3.15.4-0ubuntu0.12.04.3
Ubuntu 10.04 LTS
libnss3-1d - 3.15.4-0ubuntu0.10.04.3

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.