=========================================================================Ubuntu Security Notice USN-4166-1
October 28, 2019

php7.0, php7.2, php7.3 vulnerability
=========================================================================
A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 19.10
- Ubuntu 19.04
- Ubuntu 18.04 LTS
- Ubuntu 16.04 LTS

Summary:

PHP could be made to run programs if it received specially crafted network
traffic.

Software Description:
- php7.3: HTML-embedded scripting language interpreter
- php7.2: HTML-embedded scripting language interpreter
- php7.0: HTML-embedded scripting language interpreter

Details:

It was discovered that PHP incorrectly handled certain paths when being
used in FastCGI configurations. A remote attacker could possibly use this
issue to execute arbitrary code.

Update instructions:

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

Ubuntu 19.10:
  libapache2-mod-php7.3           7.3.11-0ubuntu0.19.10.1
  php7.3-cgi                      7.3.11-0ubuntu0.19.10.1
  php7.3-cli                      7.3.11-0ubuntu0.19.10.1
  php7.3-fpm                      7.3.11-0ubuntu0.19.10.1

Ubuntu 19.04:
  libapache2-mod-php7.2           7.2.24-0ubuntu0.19.04.1
  php7.2-cgi                      7.2.24-0ubuntu0.19.04.1
  php7.2-cli                      7.2.24-0ubuntu0.19.04.1
  php7.2-fpm                      7.2.24-0ubuntu0.19.04.1

Ubuntu 18.04 LTS:
  libapache2-mod-php7.2           7.2.24-0ubuntu0.18.04.1
  php7.2-cgi                      7.2.24-0ubuntu0.18.04.1
  php7.2-cli                      7.2.24-0ubuntu0.18.04.1
  php7.2-fpm                      7.2.24-0ubuntu0.18.04.1

Ubuntu 16.04 LTS:
  libapache2-mod-php7.0           7.0.33-0ubuntu0.16.04.7
  php7.0-cgi                      7.0.33-0ubuntu0.16.04.7
  php7.0-cli                      7.0.33-0ubuntu0.16.04.7
  php7.0-fpm                      7.0.33-0ubuntu0.16.04.7

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

References:
  https://ubuntu.com/security/notices/USN-4166-1
  CVE-2019-11043

Package Information:
  https://launchpad.net/ubuntu/+source/php7.3/7.3.11-0ubuntu0.19.10.1
  https://launchpad.net/ubuntu/+source/php7.2/7.2.24-0ubuntu0.19.04.1
  https://launchpad.net/ubuntu/+source/php7.2/7.2.24-0ubuntu0.18.04.1
  https://launchpad.net/ubuntu/+source/php7.0/7.0.33-0ubuntu0.16.04.7