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Ubuntu Security Notice USN-6729-1
April 11, 2024

apache2 vulnerabilities
==========================================================================

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

- Ubuntu 23.10
- Ubuntu 22.04 LTS
- Ubuntu 20.04 LTS

Summary:

Several security issues were fixed in Apache HTTP Server.

Software Description:
- apache2: Apache HTTP server

Details:

Orange Tsai discovered that the Apache HTTP Server incorrectly handled
validating certain input. A remote attacker could possibly use this
issue to perform HTTP request splitting attacks. (CVE-2023-38709)

Keran Mu and Jianjun Chen discovered that the Apache HTTP Server
incorrectly handled validating certain input. A remote attacker could
possibly use this issue to perform HTTP request splitting attacks.
(CVE-2024-24795)

Bartek Nowotarski discovered that the Apache HTTP Server HTTP/2 module
incorrectly handled endless continuation frames. A remote attacker could
possibly use this issue to cause the server to consume resources, leading
to a denial of service. (CVE-2024-27316)

Update instructions:

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

Ubuntu 23.10:
   apache2                         2.4.57-2ubuntu2.4

Ubuntu 22.04 LTS:
   apache2                         2.4.52-1ubuntu4.9

Ubuntu 20.04 LTS:
   apache2                         2.4.41-4ubuntu3.17

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

References:
   https://ubuntu.com/security/notices/USN-6729-1
   CVE-2023-38709, CVE-2024-24795, CVE-2024-27316

Package Information:
   https://launchpad.net/ubuntu/+source/apache2/2.4.57-2ubuntu2.4
   https://launchpad.net/ubuntu/+source/apache2/2.4.52-1ubuntu4.9
   https://launchpad.net/ubuntu/+source/apache2/2.4.41-4ubuntu3.17