Articles / Ubuntu: Security update for…

Ubuntu: Security update for NSS

Kaspar Brand discovered a vulnerability in how the Network Security Services (NSS) ASN.1 decoder handles zero length items. If the user were tricked into opening a specially crafted certificate, an attacker could possibly exploit this to cause a denial of service via application crash. Updated packages are available from security.ubuntu.com.

==========================================================================
Ubuntu Security Notice USN-1540-1
August 16, 2012

nss vulnerability
==========================================================================

A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 11.10
- Ubuntu 11.04
- Ubuntu 10.04 LTS

Summary:

NSS could be made to crash if it opened a specially crafted certificate.

Software Description:
- nss: Network Security Service library

Details:

Kaspar Brand discovered a vulnerability in how the Network Security
Services (NSS) ASN.1 decoder handles zero length items. If the user were
tricked into opening a specially crafted certificate, an attacker could
possibly exploit this to cause a denial of service via application crash.

Update instructions:

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 11.10:
 libnss3-1d                      3.12.9+ckbi-1.82-0ubuntu6.1

Ubuntu 11.04:
 libnss3-1d                      3.12.9+ckbi-1.82-0ubuntu2.2

Ubuntu 10.04 LTS:
 libnss3-1d                      3.12.9+ckbi-1.82-0ubuntu0.10.04.4

After a standard system update you need to restart any applications that
use NSS, such as Evolution, to make all the necessary changes.

References:
 http://www.ubuntu.com/usn/usn-1540-1
 CVE-2012-0441

Package Information:
 https://launchpad.net/ubuntu/+source/nss/3.12.9+ckbi-1.82-0ubuntu6.1
 https://launchpad.net/ubuntu/+source/nss/3.12.9+ckbi-1.82-0ubuntu2.2
 https://launchpad.net/ubuntu/+source/nss/3.12.9+ckbi-1.82-0ubuntu0.10.04.4
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