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Ubuntu Security Notice USN-2903-2
February 23, 2016

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

- Ubuntu 12.04 LTS

Summary:

USN-2903-1 introduced a regression in NSS.

Software Description:
- nss: Network Security Service library

Details:

USN-2903-1 fixed a vulnerability in NSS. An incorrect package versioning
change in Ubuntu 12.04 LTS caused a regression when building software
against NSS. This update fixes the problem.

We apologize for the inconvenience.

Original advisory details:

 Hanno B=C3=B6ck discovered that NSS incorrectly handled certain division
 functions, possibly leading to cryptographic weaknesses. (CVE-2016-1938)
  This update also refreshes the NSS package to version 3.21 which includes
 the latest CA certificate bundle, and removes the SPI CA.

Update instructions:

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

Ubuntu 12.04 LTS:
  libnss3-dev                     2:3.21-0ubuntu0.12.04.2

In general, a standard system update will make all the necessary changes.

References:
  https://www.ubuntu.com/usn/usn-2903-2
  https://www.ubuntu.com/usn/usn-2903-1
  https://launchpad.net/bugs/1547147

Package Information:
  https://launchpad.net/ubuntu/+source/nss/2:3.21-0ubuntu0.12.04.2