Ubuntu Security Notice USN-1540-1
16th August, 2012
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 11.10
- Ubuntu 11.04
- Ubuntu 10.04 LTS
NSS could be made to crash if it opened a specially crafted certificate.
- nss - Network Security Service library
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.
The problem can be corrected by updating your system to the following package version:
- 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
To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.
After a standard system update you need to restart any applications that
use NSS, such as Evolution, to make all the necessary changes.