USN-2088-1: NSS vulnerability

Ubuntu Security Notice USN-2088-1

23rd January, 2014

nss vulnerability

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

  • Ubuntu 13.10
  • Ubuntu 12.10
  • Ubuntu 12.04 LTS
  • Ubuntu 10.04 LTS


NSS could be made to expose sensitive information over the network.

Software description

  • nss - Network Security Service library


Brian Smith discovered that NSS incorrectly handled the TLS False Start
feature. If a remote attacker were able to perform a man-in-the-middle
attack, this flaw could be exploited to spoof SSL servers.

Update instructions

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

Ubuntu 13.10:
libnss3 2:3.15.4-0ubuntu0.13.10.1
Ubuntu 12.10:
libnss3 3.15.4-0ubuntu0.12.10.1
Ubuntu 12.04 LTS:
libnss3 3.15.4-0ubuntu0.12.04.1
Ubuntu 10.04 LTS:
libnss3-1d 3.15.4-0ubuntu0.10.04.1

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 and Chromium, to make all the necessary changes.