USN-3425-1: Apache HTTP Server vulnerability

19 September 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


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

Software Description

  • apache2 - Apache HTTP server


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

To update your system, please follow these instructions:

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