Updated Apache packages has been released for Ubuntu 14.04 LTS, 16.04 LTS, and 17.04

==========================================================================
Ubuntu Security Notice USN-3425-1
September 19, 2017

apache2 vulnerability
==========================================================================

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

- Ubuntu 17.04
- Ubuntu 16.04 LTS
- Ubuntu 14.04 LTS

Summary:

Apache HTTP Server could be made to expose sensitive information over the
network.

Software Description:
- apache2: Apache HTTP server

Details:

Hanno Böck discovered that the Apache HTTP Server incorrectly handled
Limit directives in .htaccess files. In certain configurations, a remote
attacker could possibly use this issue to read arbitrary server memory,
including sensitive information. This issue is known as Optionsbleed.

Update instructions:

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

Ubuntu 17.04:
apache2-bin 2.4.25-3ubuntu2.3

Ubuntu 16.04 LTS:
apache2-bin 2.4.18-2ubuntu3.5

Ubuntu 14.04 LTS:
apache2-bin 2.4.7-1ubuntu4.18

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

References:
https://www.ubuntu.com/usn/usn-3425-1
CVE-2017-9798

Package Information:
https://launchpad.net/ubuntu/+source/apache2/2.4.25-3ubuntu2.3
https://launchpad.net/ubuntu/+source/apache2/2.4.18-2ubuntu3.5
https://launchpad.net/ubuntu/+source/apache2/2.4.7-1ubuntu4.18

  Apache HTTP Server Update for Ubuntu