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Ubuntu Security Notice USN-1763-2

Ubuntu Security Notice USN-1763-2
Posted Mar 15, 2013
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 1763-2 - USN-1763-1 fixed a vulnerability in NSS. This update provides the NSPR needed to use the new NSS. 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. Various other issues were also addressed.

tags | advisory, remote, protocol
systems | linux, ubuntu
SHA-256 | 14c2109289cf639924ee155649aaf99f56995b1e908629a630645e7226d2101b

Ubuntu Security Notice USN-1763-2

Change Mirror Download
============================================================================
Ubuntu Security Notice USN-1763-2
March 14, 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

Summary:

NSPR update to work with the new NSS.

Software Description:
- nspr: NetScape Portable Runtime Library

Details:

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 versions:

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

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.

References:
http://www.ubuntu.com/usn/usn-1763-2
http://www.ubuntu.com/usn/usn-1763-1
https://launchpad.net/bugs/1155295

Package Information:
https://launchpad.net/ubuntu/+source/nspr/4.9.5-0ubuntu0.12.10.1
https://launchpad.net/ubuntu/+source/nspr/4.9.5-0ubuntu0.12.04.1
https://launchpad.net/ubuntu/+source/nspr/4.9.5-0ubuntu0.11.10.1
https://launchpad.net/ubuntu/+source/nspr/4.9.5-0ubuntu0.10.04.1
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