USN-1889-1: HAProxy vulnerability

Ubuntu Security Notice USN-1889-1

20th June, 2013

haproxy vulnerability

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

  • Ubuntu 13.04
  • Ubuntu 12.10
  • Ubuntu 12.04 LTS


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

Software description

  • haproxy - fast and reliable load balancing reverse proxy


David Torgerson discovered that HAProxy incorrectly parsed certain HTTP
headers. A remote attacker could use this issue to cause HAProxy to stop
responding, resulting in a denial of service.

Update instructions

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

Ubuntu 13.04:
haproxy 1.4.18-0ubuntu3.1
Ubuntu 12.10:
haproxy 1.4.18-0ubuntu2.2
Ubuntu 12.04 LTS:
haproxy 1.4.18-0ubuntu1.2

To update your system, please follow these instructions:

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