[USN-4203-2] NSS vulnerability

[Leonidas S. Barbosa]

==========================================================================
Ubuntu Security Notice USN-4203-2
November 27, 2019

nss vulnerability
==========================================================================

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

- Ubuntu 14.04 ESM
- Ubuntu 12.04 ESM

Summary:

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

Software Description:
- nss: Network Security Service library

Details:

USN-4203-1 fixed a vulnerability in NSS. This update provides
the corresponding update for Ubuntu 12.04 ESM and Ubuntu 14.04 ESM.

Original advisory 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 14.04 ESM:
  libnss3                         2:3.28.4-0ubuntu0.14.04.5+esm2

Ubuntu 12.04 ESM:
  libnss3                         2:3.28.4-0ubuntu0.12.04.5

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://usn.ubuntu.com/4203-2
  https://usn.ubuntu.com/4203-1
  CVE-2019-11745
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