USN-4174-1: HAproxy vulnerability

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Ubuntu security notices

haproxy vulnerability

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

  • Ubuntu 19.10
  • Ubuntu 19.04
  • Ubuntu 18.04 LTS
  • Ubuntu 16.04 LTS

HAproxy would allow unintended access if ii received specially crafted HTTP request.

Software Description

  • haproxy - fast and reliable load balancing reverse proxy

It was discovered that HAproxy incorrectly handled certain HTTP requests. An attacker could possibly use this issue to a privilege escalation (Request Smuggling).

Update instructions

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

Ubuntu 19.10
haproxy - 2.0.5-1ubuntu0.2
Ubuntu 19.04
haproxy - 1.8.19-1ubuntu1.2
Ubuntu 18.04 LTS
haproxy - 1.8.8-1ubuntu0.7
Ubuntu 16.04 LTS
haproxy - 1.6.3-1ubuntu0.3

To update your system, please follow these instructions:

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


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