=========================================================================Ubuntu Security Notice USN-5869-1
February 14, 2023

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

- Ubuntu 22.10
- Ubuntu 22.04 LTS
- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS

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.

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.

References:
   https://ubuntu.com/security/notices/USN-5869-1
   CVE-2023-25725

Package Information:
   https://launchpad.net/ubuntu/+source/haproxy/2.4.18-1ubuntu1.2
   https://launchpad.net/ubuntu/+source/haproxy/2.4.18-0ubuntu1.2
   https://launchpad.net/ubuntu/+source/haproxy/2.0.29-0ubuntu1.3
   https://launchpad.net/ubuntu/+source/haproxy/1.8.8-1ubuntu0.13