USN-2864-1: NSS vulnerability

Ubuntu Security Notice USN-2864-1

7th January, 2016

nss vulnerability

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

• Ubuntu 15.10
• Ubuntu 15.04
• Ubuntu 14.04 LTS
• Ubuntu 12.04 LTS

Summary

NSS could be made to expose sensitive information over the network.

Software description

• nss - Network Security Service library

Details

Karthikeyan Bhargavan and Gaetan Leurent discovered that NSS incorrectly
allowed MD5 to be used for TLS 1.2 connections. If a remote attacker were
able to perform a man-in-the-middle attack, this flaw could be exploited to
view sensitive information.

Update instructions

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

Ubuntu 15.10:

libnss3 2:3.19.2.1-0ubuntu0.15.10.2

Ubuntu 15.04:

libnss3 2:3.19.2.1-0ubuntu0.15.04.2

Ubuntu 14.04 LTS:

libnss3 2:3.19.2.1-0ubuntu0.14.04.2

Ubuntu 12.04 LTS:

libnss3 3.19.2.1-0ubuntu0.12.04.2

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 and Chromium, to make all the necessary changes.

References

CVE-2015-7575