An Apache HTTP Server security update has been released for Ubuntu Linux 18.04 LTS, 20.04 LTS, 22.04 LTS, and 22.10.

USN-5839-1: Apache HTTP Server vulnerabilities

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Ubuntu Security Notice USN-5839-1
February 01, 2023

apache2 vulnerabilities
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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:

Several security issues were fixed in Apache HTTP Server.

Software Description:
- apache2: Apache HTTP server

Details:

It was discovered that the Apache HTTP Server mod_dav module incorrectly
handled certain If: request headers. A remote attacker could possibly use
this issue to cause the server to crash, resulting in a denial of service.
(CVE-2006-20001)

ZeddYu_Lu discovered that the Apache HTTP Server mod_proxy_ajp module
incorrectly interpreted certain HTTP Requests. A remote attacker could
possibly use this issue to perform an HTTP Request Smuggling attack.
(CVE-2022-36760)

Dimas Fariski Setyawan Putra discovered that the Apache HTTP Server
mod_proxy module incorrectly truncated certain response headers. This may
result in later headers not being interpreted by the client.
(CVE-2022-37436)

Update instructions:

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

Ubuntu 22.10:
apache2 2.4.54-2ubuntu1.1

Ubuntu 22.04 LTS:
apache2 2.4.52-1ubuntu4.3

Ubuntu 20.04 LTS:
apache2 2.4.41-4ubuntu3.13

Ubuntu 18.04 LTS:
apache2 2.4.29-1ubuntu4.26

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

References:
https://ubuntu.com/security/notices/USN-5839-1
CVE-2006-20001, CVE-2022-36760, CVE-2022-37436

Package Information:
https://launchpad.net/ubuntu/+source/apache2/2.4.54-2ubuntu1.1
https://launchpad.net/ubuntu/+source/apache2/2.4.52-1ubuntu4.3
https://launchpad.net/ubuntu/+source/apache2/2.4.41-4ubuntu3.13
https://launchpad.net/ubuntu/+source/apache2/2.4.29-1ubuntu4.26