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Ubuntu Security Notice USN-1540-2

Ubuntu Security Notice USN-1540-2
Posted Aug 21, 2012
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 1540-2 - USN-1540-1 fixed vulnerabilities in NSS. This update provides the corresponding updates for Ubuntu 12.04 LTS. 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. Various other issues were also addressed.

tags | advisory, denial of service, vulnerability
systems | linux, ubuntu
advisories | CVE-2012-0441
SHA-256 | 8f57cd4a7c1aea015a6435f2f69027c64f4030e74c9def113569254e48b1fe29

Ubuntu Security Notice USN-1540-2

Change Mirror Download
============================================================================
Ubuntu Security Notice USN-1540-2
August 21, 2012

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

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

- Ubuntu 12.04 LTS

Summary:

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

Software Description:
- nss: Network Security Service library

Details:

USN-1540-1 fixed vulnerabilities in NSS. This update provides the
corresponding updates for Ubuntu 12.04 LTS.

Original advisory 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 12.04 LTS:
libnss3 3.13.1.with.ckbi.1.88-1ubuntu6.1

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-1540-2
http://www.ubuntu.com/usn/usn-1540-1
CVE-2012-0441

Package Information:
https://launchpad.net/ubuntu/+source/nss/3.13.1.with.ckbi.1.88-1ubuntu6.1
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