=========================================================================Ubuntu Security Notice USN-4203-1
November 27, 2019

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

Summary:

NSS could be made to crash or run programs if it received specially crafted
input.

Software Description:
- nss: Network Security Service library

Details:

It was discovered that NSS incorrectly handled certain memory operations. A
remote 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 19.10:
  libnss3                         2:3.45-1ubuntu2.1

Ubuntu 19.04:
  libnss3                         2:3.42-1ubuntu2.3

Ubuntu 18.04 LTS:
  libnss3                         2:3.35-2ubuntu2.5

Ubuntu 16.04 LTS:
  libnss3                         2:3.28.4-0ubuntu0.16.04.8

After a standard system update you need to restart any applications that
use NSS, such as Evolution, to make all the necessary changes.

References:
  https://ubuntu.com/security/notices/USN-4203-1
  CVE-2019-11745

Package Information:
  https://launchpad.net/ubuntu/+source/nss/2:3.45-1ubuntu2.1
  https://launchpad.net/ubuntu/+source/nss/2:3.42-1ubuntu2.3
  https://launchpad.net/ubuntu/+source/nss/2:3.35-2ubuntu2.5
  https://launchpad.net/ubuntu/+source/nss/2:3.28.4-0ubuntu0.16.04.8