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Ubuntu Security Notice USN-1763-1
March 14, 2013

nss vulnerability

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

Summary:

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

Software Description:

• nss: Network Security Service library

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 versions:

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

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.

References:
http://www.ubuntu.com/usn/usn-1763-1
CVE-2013-1620

Package Information:
https://launchpad.net/ubuntu/+source/nss/3.14.3-0ubuntu0.12.10.1
https://launchpad.net/ubuntu/+source/nss/3.14.3-0ubuntu0.12.04.1
https://launchpad.net/ubuntu/+source/nss/3.14.3-0ubuntu0.11.10.1
https://launchpad.net/ubuntu/+source/nss/3.14.3-0ubuntu0.10.04.1

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