[USN-6294-1] HAProxy vulnerability

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Ubuntu Security Notice USN-6294-1
August 16, 2023

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

- Ubuntu 23.04
- Ubuntu 22.04 LTS

Summary:

HAProxy could allow unintended access to network services.

Software Description:
- haproxy: fast and reliable load balancing reverse proxy

Details:

Ben Kallus discovered that HAProxy incorrectly handled empty Content-Length
headers. A remote attacker could possibly use this issue to manipulate the
payload and bypass certain restrictions.

Update instructions:

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

Ubuntu 23.04:
haproxy 2.6.9-1ubuntu1.1

Ubuntu 22.04 LTS:
haproxy 2.4.22-0ubuntu0.22.04.2

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

References:
https://ubuntu.com/security/notices/USN-6294-1
CVE-2023-40225

Package Information:
https://launchpad.net/ubuntu/+source/haproxy/2.6.9-1ubuntu1.1
https://launchpad.net/ubuntu/+source/haproxy/2.4.22-0ubuntu0.22.04.2