USN-4212-1: HAProxy vulnerability

4 December 2019

haproxy vulnerability

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

  • Ubuntu 19.10
  • Ubuntu 19.04
  • Ubuntu 18.04 LTS

Summary

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

Details

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
haproxy - 2.0.5-1ubuntu0.3
Ubuntu 19.04
haproxy - 1.8.19-1ubuntu1.3
Ubuntu 18.04 LTS
haproxy - 1.8.8-1ubuntu0.9

To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.

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

References