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The following updates has been released for Ubuntu Linux:

USN-3715-1: dns-root-data update
USN-3716-1: Dnsmasq update



USN-3715-1: dns-root-data update


==========================================================================
Ubuntu Security Notice USN-3715-1
July 12, 2018

dns-root-data update
==========================================================================

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

- Ubuntu 17.10
- Ubuntu 16.04 LTS

Summary:

The list of trust anchors has been updated.

Software Description:
- dns-root-data: DNS root data including root zone and DNSSEC key

Details:

This update adds the latest DNSSEC validation trust anchor required for the
upcoming Root Zone KSK Rollover and refreshes the list of root hints.

Update instructions:

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

Ubuntu 17.10:
dns-root-data 2018013001~17.10.1

Ubuntu 16.04 LTS:
dns-root-data 2018013001~16.04.1

In general, a standard system update will make all the necessary changes.

References:
https://usn.ubuntu.com/usn/usn-3715-1
https://launchpad.net/bugs/1721129

Package Information:
https://launchpad.net/ubuntu/+source/dns-root-data/2018013001~17.10.1
https://launchpad.net/ubuntu/+source/dns-root-data/2018013001~16.04.1

USN-3716-1: Dnsmasq update


==========================================================================
Ubuntu Security Notice USN-3716-1
July 12, 2018

dnsmasq update
==========================================================================

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

- Ubuntu 16.04 LTS

Summary:

The list of trust anchors has been updated.

Software Description:
- dnsmasq: Small caching DNS proxy and DHCP/TFTP server

Details:

This update adds the latest DNSSEC validation trust anchor required for the
upcoming Root Zone KSK Rollover.

Update instructions:

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

Ubuntu 16.04 LTS:
dnsmasq 2.75-1ubuntu0.16.04.5
dnsmasq-base 2.75-1ubuntu0.16.04.5
dnsmasq-utils 2.75-1ubuntu0.16.04.5

In general, a standard system update will make all the necessary changes.

References:
https://usn.ubuntu.com/usn/usn-3716-1
https://launchpad.net/bugs/1721129

Package Information:
https://launchpad.net/ubuntu/+source/dnsmasq/2.75-1ubuntu0.16.04.5