USN-3898-1: NSS vulnerability

27 February 2019

nss vulnerability

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

  • Ubuntu 18.10
  • Ubuntu 18.04 LTS
  • Ubuntu 16.04 LTS
  • Ubuntu 14.04 LTS


NSS could be made to crash if it received specially crafted network traffic.

Software Description

  • nss - Network Security Service library


Hanno Böck and Damian Poddebniak discovered that NSS incorrectly handled certain CMS functions. A remote attacker could possibly use this issue to cause NSS to crash, resulting in a denial of service.

Update instructions

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

Ubuntu 18.10
libnss3 - 2:3.36.1-1ubuntu1.2
Ubuntu 18.04 LTS
libnss3 - 2:3.35-2ubuntu2.2
Ubuntu 16.04 LTS
libnss3 - 2:3.28.4-0ubuntu0.16.04.5
Ubuntu 14.04 LTS
libnss3 - 2:3.28.4-0ubuntu0.14.04.5

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, to make all the necessary changes.