USN-1540-2: NSS vulnerability

21 August 2012

nss vulnerability

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

  • Ubuntu 12.04 LTS


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

Software Description

  • nss - Network Security Service library


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

To update your system, please follow these instructions:

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