USN-3011-1: HAProxy vulnerability

20 June 2016

haproxy vulnerability

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

  • Ubuntu 16.04 LTS


HAProxy could be made to crash if it received specially crafted network traffic.

Software Description

  • haproxy - fast and reliable load balancing reverse proxy


Falco Schmutz discovered that HAProxy incorrectly handled the reqdeny filter. A remote attacker could use this issue to cause HAProxy 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 16.04 LTS
haproxy - 1.6.3-1ubuntu0.1

To update your system, please follow these instructions:

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