==========================================================================
Ubuntu Security Notice USN-3029-1
July 11, 2016
nss vulnerability
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
– Ubuntu 16.04 LTS
– Ubuntu 15.10
– Ubuntu 14.04 LTS
– Ubuntu 12.04 LTS
Summary:
NSS could be made to crash or run programs if it processed specially
crafted network traffic.
Software Description:
– nss: Network Security Service library
Details:
Tyson Smith and Jed Davis discovered that NSS incorrectly handled memory. A
remote attacker could use this issue to cause NSS to crash, resulting in a
denial of service, or possibly execute arbitrary code.
This update refreshes the NSS package to version 3.23 which includes
the latest CA certificate bundle. As a security improvement, this update
also modifies NSS behaviour to reject DH key sizes below 1024 bits,
preventing a possible downgrade attack.
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 16.04 LTS:
libnss3 2:3.23-0ubuntu0.16.04.1
Ubuntu 15.10:
libnss3 2:3.23-0ubuntu0.15.10.1
Ubuntu 14.04 LTS:
libnss3 2:3.23-0ubuntu0.14.04.1
Ubuntu 12.04 LTS:
libnss3 2:3.23-0ubuntu0.12.04.1
This update uses a new upstream release, which includes additional bug
fixes. 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:
http://www.ubuntu.com/usn/usn-3029-1
CVE-2016-2834
Package Information:
https://launchpad.net/ubuntu/+source/nss/2:3.23-0ubuntu0.16.04.1
https://launchpad.net/ubuntu/+source/nss/2:3.23-0ubuntu0.15.10.1
https://launchpad.net/ubuntu/+source/nss/2:3.23-0ubuntu0.14.04.1
https://launchpad.net/ubuntu/+source/nss/2:3.23-0ubuntu0.12.04.1
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