Ubuntu 22.10 USN-5869-1 Critical Security Flaw in HAProxy Access

ubuntu

February 14, 2023

HAProxy could allow unintended access to network services.

Summary

HAProxy could allow unintended access to network services.

Software Description:

- haproxy: fast and reliable load balancing reverse proxy

Details:

Bahruz Jabiyev, Anthony Gavazzi, Engin Kirda, Kaan Onarlioglu, Adi Peleg,

and Harvey Tuch discovered that HAProxy incorrectly handled empty header

names. A remote attacker could possibly use this issue to manipulate

headers and bypass certain authentication checks and restrictions.

Topics Covered

security advisory critical access issue authentication ubuntu network services haproxy

Update Instructions

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

Ubuntu 22.10:
   haproxy                         2.4.18-1ubuntu1.2

Ubuntu 22.04 LTS:
   haproxy                         2.4.18-0ubuntu1.2

Ubuntu 20.04 LTS:
   haproxy                         2.0.29-0ubuntu1.3

Ubuntu 18.04 LTS:
   haproxy                         1.8.8-1ubuntu0.13

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