USN-1763-2: NSPR update

Ubuntu Security Notice USN-1763-2

14th March, 2013

nspr update

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

  • Ubuntu 12.10
  • Ubuntu 12.04 LTS
  • Ubuntu 11.10
  • Ubuntu 10.04 LTS


NSPR update to work with the new NSS.

Software description

  • nspr - NetScape Portable Runtime Library


USN-1763-1 fixed a vulnerability in NSS. This update provides the NSPR
needed to use the new NSS.

Original advisory details:

Nadhem Alfardan and Kenny Paterson discovered that the TLS protocol as used
in NSS was vulnerable to a timing side-channel attack known as the
"Lucky Thirteen" issue. A remote attacker could use this issue to perform
plaintext-recovery attacks via analysis of timing data.

Update instructions

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

Ubuntu 12.10:
libnspr4 4.9.5-0ubuntu0.12.10.1
Ubuntu 12.04 LTS:
libnspr4 4.9.5-0ubuntu0.12.04.1
Ubuntu 11.10:
libnspr4 4.9.5-0ubuntu0.11.10.1
Ubuntu 10.04 LTS:
libnspr4-0d 4.9.5-0ubuntu0.10.04.1

To update your system, please follow these instructions:

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


LP: 1155295