Ubuntu Security Notice USN-4203-2

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


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

Software Description:
– nss: Network Security Service library


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.