What is the vulnerability ID for this HAProxy vulnerability?

The vulnerability ID for this HAProxy vulnerability is USN-6294-1.

What is the description of the HAProxy vulnerability?

The HAProxy vulnerability involves incorrectly handling empty Content-Length headers, which allows a remote attacker to manipulate payload and bypass certain restrictions.

What software is affected by this vulnerability?

The affected software includes HAProxy version 2.6.9-1ubuntu1.1 in Ubuntu 23.04 and HAProxy version 2.4.22-0ubuntu0.22.04.2 in Ubuntu 22.04.

How can an attacker exploit this vulnerability?

An attacker can exploit this vulnerability by manipulating the payload through empty Content-Length headers to bypass certain restrictions.

Where can I find more information about this vulnerability?

More information about this vulnerability can be found at the following references: [CVE-2023-40225](https://ubuntu.com/security/CVE-2023-40225), [USN-6294-2](https://ubuntu.com/security/notices/USN-6294-2), and [Launchpad](https://launchpad.net/ubuntu/+source/haproxy/2.6.9-1ubuntu1.1).

Vulnerability/
USN-6294-1

16/8/2023

USN-6294-1: HAProxy vulnerability

First published: Wed Aug 16 2023(Updated: )

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.

Affected Software	Affected Version	How to fix
All of
ubuntu/haproxy	<2.6.9-1ubuntu1.1	2.6.9-1ubuntu1.1
Ubuntu Ubuntu	=23.04
All of
ubuntu/haproxy	<2.4.22-0ubuntu0.22.04.2	2.4.22-0ubuntu0.22.04.2
Ubuntu Ubuntu	=22.04

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Reference Links

Child vulnerabilities

(Contains the following vulnerabilities)

CVE-2023-40225

Frequently Asked Questions

What is the vulnerability ID for this HAProxy vulnerability?
The vulnerability ID for this HAProxy vulnerability is USN-6294-1.
What is the description of the HAProxy vulnerability?
The HAProxy vulnerability involves incorrectly handling empty Content-Length headers, which allows a remote attacker to manipulate payload and bypass certain restrictions.
What software is affected by this vulnerability?
The affected software includes HAProxy version 2.6.9-1ubuntu1.1 in Ubuntu 23.04 and HAProxy version 2.4.22-0ubuntu0.22.04.2 in Ubuntu 22.04.
How can an attacker exploit this vulnerability?
An attacker can exploit this vulnerability by manipulating the payload through empty Content-Length headers to bypass certain restrictions.
Where can I find more information about this vulnerability?
More information about this vulnerability can be found at the following references: [CVE-2023-40225](https://ubuntu.com/security/CVE-2023-40225), [USN-6294-2](https://ubuntu.com/security/notices/USN-6294-2), and [Launchpad](https://launchpad.net/ubuntu/+source/haproxy/2.6.9-1ubuntu1.1).

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