=========================================================================Ubuntu Security Notice USN-4099-1
August 15, 2019

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

- Ubuntu 19.04
- Ubuntu 18.04 LTS
- Ubuntu 16.04 LTS

Summary:

nginx could be made to crash if it received specially crafted network
traffic.

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

Details:

Jonathan Looney discovered that nginx incorrectly handled the HTTP/2
implementation. A remote attacker could possibly use this issue to consume
resources, leading to a denial of service.

Update instructions:

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

Ubuntu 19.04:
  nginx-common                    1.15.9-0ubuntu1.1
  nginx-core                      1.15.9-0ubuntu1.1
  nginx-extras                    1.15.9-0ubuntu1.1
  nginx-full                      1.15.9-0ubuntu1.1
  nginx-light                     1.15.9-0ubuntu1.1

Ubuntu 18.04 LTS:
  nginx-common                    1.14.0-0ubuntu1.4
  nginx-core                      1.14.0-0ubuntu1.4
  nginx-extras                    1.14.0-0ubuntu1.4
  nginx-full                      1.14.0-0ubuntu1.4
  nginx-light                     1.14.0-0ubuntu1.4

Ubuntu 16.04 LTS:
  nginx-common                    1.10.3-0ubuntu0.16.04.4
  nginx-core                      1.10.3-0ubuntu0.16.04.4
  nginx-extras                    1.10.3-0ubuntu0.16.04.4
  nginx-full                      1.10.3-0ubuntu0.16.04.4
  nginx-light                     1.10.3-0ubuntu0.16.04.4

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

References:
  https://ubuntu.com/security/notices/USN-4099-1
  CVE-2019-9511, CVE-2019-9513, CVE-2019-9516

Package Information:
  https://launchpad.net/ubuntu/+source/nginx/1.15.9-0ubuntu1.1
  https://launchpad.net/ubuntu/+source/nginx/1.14.0-0ubuntu1.4
  https://launchpad.net/ubuntu/+source/nginx/1.10.3-0ubuntu0.16.04.4