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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: <c613694c-2a6d-b2e5-e690-45d5652507dd@canonical.com>
Subject: [USN-3164-1] Exim vulnerability

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==========================================================================
Ubuntu Security Notice USN-3164-1
January 05, 2017

exim4 vulnerability
==========================================================================

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

- Ubuntu 16.10
- Ubuntu 16.04 LTS
- Ubuntu 14.04 LTS
- Ubuntu 12.04 LTS

Summary:

Exim could be made to expose private DKIM signing keys.

Software Description:
- exim4: Exim is a mail transport agent

Details:

Bjoern Jacke discovered that Exim incorrectly handled DKIM keys. In certain
configurations, private DKIM signing keys could be leaked to the log files.

Update instructions:

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

Ubuntu 16.10:
  exim4-daemon-heavy              4.87-3ubuntu1.1
  exim4-daemon-light              4.87-3ubuntu1.1

Ubuntu 16.04 LTS:
  exim4-daemon-heavy              4.86.2-2ubuntu2.1
  exim4-daemon-light              4.86.2-2ubuntu2.1

Ubuntu 14.04 LTS:
  exim4-daemon-heavy              4.82-3ubuntu2.2
  exim4-daemon-light              4.82-3ubuntu2.2

Ubuntu 12.04 LTS:
  exim4-daemon-heavy              4.76-3ubuntu3.4
  exim4-daemon-light              4.76-3ubuntu3.4

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

References:
  http://www.ubuntu.com/usn/usn-3164-1
  CVE-2016-9963

Package Information:
  https://launchpad.net/ubuntu/+source/exim4/4.87-3ubuntu1.1
  https://launchpad.net/ubuntu/+source/exim4/4.86.2-2ubuntu2.1
  https://launchpad.net/ubuntu/+source/exim4/4.82-3ubuntu2.2
  https://launchpad.net/ubuntu/+source/exim4/4.76-3ubuntu3.4



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