Ubuntu Security Notice USN-1763-1
14th March, 2013
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
NSS could be made to expose sensitive information over the network.
- nss - Network Security Service library
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.
The problem can be corrected by updating your system to the following package version:
- Ubuntu 12.10:
- libnss3 3.14.3-0ubuntu0.12.10.1
- Ubuntu 12.04 LTS:
- libnss3 3.14.3-0ubuntu0.12.04.1
- Ubuntu 11.10:
- libnss3 3.14.3-0ubuntu0.11.10.1
- Ubuntu 10.04 LTS:
- libnss3-1d 3.14.3-0ubuntu0.10.04.1
To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.
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.