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Ubuntu Security Notice USN-3336-1
June 21, 2017

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

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

– Ubuntu 17.04
– Ubuntu 16.10
– Ubuntu 16.04 LTS
– Ubuntu 14.04 LTS

Summary:

NSS could be made to crash if it received specially crafted network
traffic.

Software Description:
– nss: Network Security Service library

Details:

It was discovered that NSS incorrectly handled certain empty SSLv2
messages. A remote attacker could possibly use this issue to cause NSS to
crash, resulting in a denial of service.

Update instructions:

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

Ubuntu 17.04:
libnss3 2:3.28.4-0ubuntu0.17.04.2

Ubuntu 16.10:
libnss3 2:3.28.4-0ubuntu0.16.10.2

Ubuntu 16.04 LTS:
libnss3 2:3.28.4-0ubuntu0.16.04.2

Ubuntu 14.04 LTS:
libnss3 2:3.28.4-0ubuntu0.14.04.2

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:
https://www.ubuntu.com/usn/usn-3336-1
CVE-2017-7502

Package Information:
https://launchpad.net/ubuntu/+source/nss/2:3.28.4-0ubuntu0.17.04.2
https://launchpad.net/ubuntu/+source/nss/2:3.28.4-0ubuntu0.16.10.2
https://launchpad.net/ubuntu/+source/nss/2:3.28.4-0ubuntu0.16.04.2
https://launchpad.net/ubuntu/+source/nss/2:3.28.4-0ubuntu0.14.04.2

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