=========================================================================Ubuntu Security Notice USN-3009-1
June 20, 2016

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

- Ubuntu 16.04 LTS
- Ubuntu 15.10

Summary:

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

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

Details:

Edwin Török discovered that Dnsmasq incorrectly handled certain CNAME
responses. A remote attacker could use this issue to cause Dnsmasq 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 16.04 LTS:
  dnsmasq                         2.75-1ubuntu0.16.04.1
  dnsmasq-base                    2.75-1ubuntu0.16.04.1
  dnsmasq-utils                   2.75-1ubuntu0.16.04.1

Ubuntu 15.10:
  dnsmasq                         2.75-1ubuntu0.15.10.1
  dnsmasq-base                    2.75-1ubuntu0.15.10.1
  dnsmasq-utils                   2.75-1ubuntu0.15.10.1

After a standard system update you need to reboot your computer to make
all the necessary changes.

References:
  https://ubuntu.com/security/notices/USN-3009-1
  CVE-2015-8899

Package Information:
  https://launchpad.net/ubuntu/+source/dnsmasq/2.75-1ubuntu0.16.04.1
  https://launchpad.net/ubuntu/+source/dnsmasq/2.75-1ubuntu0.15.10.1