USN-3038-1: Apache HTTP Server vulnerability

18 July 2016

apache2 vulnerability

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

  • Ubuntu 16.04 LTS
  • Ubuntu 15.10
  • Ubuntu 14.04 LTS
  • Ubuntu 12.04 LTS


A security issue was fixed in the Apache HTTP Server.

Software Description

  • apache2 - Apache HTTP server


It was discovered that the Apache HTTP Server would set the HTTP_PROXY environment variable based on the contents of the Proxy header from HTTP requests. A remote attacker could possibly use this issue in combination with CGI scripts that honour the HTTP_PROXY variable to redirect outgoing HTTP requests.

Update instructions

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

Ubuntu 16.04 LTS
apache2-bin - 2.4.18-2ubuntu3.1
Ubuntu 15.10
apache2-bin - 2.4.12-2ubuntu2.1
Ubuntu 14.04 LTS
apache2.2-bin - 2.4.7-1ubuntu4.13
Ubuntu 12.04 LTS
apache2.2-bin - 2.2.22-1ubuntu1.11

To update your system, please follow these instructions:

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