USN-4231-1: NSS vulnerability

8 January 2020

nss vulnerability

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

  • Ubuntu 19.10
  • Ubuntu 19.04
  • Ubuntu 18.04 LTS
  • Ubuntu 16.04 LTS
  • Ubuntu 14.04 ESM
  • Ubuntu 12.04 ESM


NSS could be made to execute arbitrary code if it received a specially crafted input.

Software Description

  • nss - Network Security Service library


It was discovered that NSS incorrectly handled certain inputs. An attacker could possibly use this issue to execute arbitrary code.

Update instructions

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

Ubuntu 19.10
libnss3 - 2:3.45-1ubuntu2.2
Ubuntu 19.04
libnss3 - 2:3.42-1ubuntu2.5
Ubuntu 18.04 LTS
libnss3 - 2:3.35-2ubuntu2.7
Ubuntu 16.04 LTS
libnss3 - 2:3.28.4-0ubuntu0.16.04.10
Ubuntu 14.04 ESM
libnss3 - 2:3.28.4-0ubuntu0.14.04.5+esm4
Ubuntu 12.04 ESM
libnss3 - 2:3.28.4-0ubuntu0.12.04.7

To update your system, please follow these instructions:

After a standard system update you need to reboot your computer to make all the necessary changes.