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.
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Ubuntu Security Notice USN-1763-1
March 14, 2013
nss vulnerability
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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