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USN-4174-1: HAproxy vulnerability

5 November 2019

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



  • 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
Ubuntu 19.04
Ubuntu 18.04
Ubuntu 16.04

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