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From: Marc Deslauriers <marc.deslauriers@canonical.com>
Reply-To: Ubuntu Security <security@ubuntu.com>
To: ubuntu-security-announce@lists.ubuntu.com
Message-ID: <576831E4.1060205@canonical.com>
Subject: [USN-3009-1] Dnsmasq vulnerability

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==========================================================================
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:
  http://www.ubuntu.com/usn/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



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