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Ubuntu Security Notice USN-1763-1

Ubuntu Security Notice USN-1763-1
Posted Mar 15, 2013
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 1763-1 - 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.

tags | advisory, remote, protocol
systems | linux, ubuntu
advisories | CVE-2013-1620
SHA-256 | 0169b782ecce9f3cb1ee538627164630ed963e7b52a23bd3d0008dc583acfa40

Ubuntu Security Notice USN-1763-1

Change Mirror Download
============================================================================
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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