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Ubuntu Security Notice USN-5839-2
February 02, 2023

apache2 vulnerability
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A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 16.04 ESM

Summary:

Several security issues were fixed in Apache HTTP Server.

Software Description:
- apache2: Apache HTTP server

Details:

USN-5839-1 fixed a vulnerability in Apache. This update provides
the corresponding update for Ubuntu 16.04 ESM.

Original advisory details:

 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 16.04 ESM:
  apache2                         2.4.18-2ubuntu3.17+esm9

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

References:
  https://ubuntu.com/security/notices/USN-5839-2
  https://ubuntu.com/security/notices/USN-5839-1
  CVE-2022-37436