USN-4212-1: HAProxy vulnerability

USN-4212-1: HAProxy vulnerability

haproxy vulnerability

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

  • Ubuntu 19.10
  • Ubuntu 19.04
  • Ubuntu 18.04 LTS


HAProxy could be made to execute arbitrary code if it received a specially crafted HTTP/2 header.

Software Description

  • haproxy – fast and reliable load balancing reverse proxy


Tim Düsterhus discovered that HAProxy incorrectly handled certain HTTP/2 headers.
An attacker could possibly use this issue to execute arbitrary code through CRLF injection.

Update instructions

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

Ubuntu 19.10
Ubuntu 19.04
Ubuntu 18.04 LTS

To update your system, please follow these instructions:

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


Source: USN-4212-1: HAProxy vulnerability

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