A nginx security update has been released for Ubuntu Linux 14.04 ESM and 16.04 ESM.

USN-5109-1: nginx vulnerability

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Ubuntu Security Notice USN-5109-1
October 18, 2021

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

- Ubuntu 16.04 ESM
- Ubuntu 14.04 ESM

Summary:

A security issue was fixed in nginx.

Software Description:
- nginx: small, powerful, scalable web/proxy server

Details:

It was discovered that nginx incorrectly handled files with
certain modification dates. A remote attacker could possibly
use this issue to cause a denial of service or other unspecified
impact.

Update instructions:

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

Ubuntu 16.04 ESM:
nginx 1.10.3-0ubuntu0.16.04.5+esm2

Ubuntu 14.04 ESM:
nginx 1.4.6-1ubuntu3.9+esm3

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

References:
  https://ubuntu.com/security/notices/USN-5109-1
CVE-2017-20005