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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"
 <ubuntu-security-announce@lists.ubuntu.com>
Message-ID: <aecd2f2e-4346-79a1-7f9c-a3215e877762@canonical.com>
Subject: [USN-3395-1] c-ares vulnerability

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==========================================================================
Ubuntu Security Notice USN-3395-1
August 17, 2017

c-ares vulnerability
==========================================================================

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

- Ubuntu 17.04
- Ubuntu 16.04 LTS
- Ubuntu 14.04 LTS

Summary:

c-ares could be made to crash if it received specially crafted network
traffic.

Software Description:
- c-ares: library for asynchronous name resolution

Details:

It was discovered that c-ares incorrectly handled certain NAPTR responses.
A remote attacker could possibly use this issue to cause applications using
c-ares 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:
  libc-ares2                      1.12.0-1ubuntu0.1

Ubuntu 16.04 LTS:
  libc-ares2                      1.10.0-3ubuntu0.2

Ubuntu 14.04 LTS:
  libc-ares2                      1.10.0-2ubuntu0.2

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

References:
  https://www.ubuntu.com/usn/usn-3395-1
  CVE-2017-1000381

Package Information:
  https://launchpad.net/ubuntu/+source/c-ares/1.12.0-1ubuntu0.1
  https://launchpad.net/ubuntu/+source/c-ares/1.10.0-3ubuntu0.2
  https://launchpad.net/ubuntu/+source/c-ares/1.10.0-2ubuntu0.2



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