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Ubuntu Security Notice USN-4166-2
October 29, 2019

php5 vulnerability
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A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 14.04 ESM
- Ubuntu 12.04 ESM

Summary:

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

Software Description:
- php5: HTML-embedded scripting language interpreter

Details:

USN-4166-1 fixed a vulnerability in PHP. This update provides
the corresponding update for Ubuntu 12.04 ESM and Ubuntu 14.04 ESM.

Original advisory 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 14.04 ESM:
  libapache2-mod-php5             5.5.9+dfsg-1ubuntu4.29+esm6
  php5-cgi                        5.5.9+dfsg-1ubuntu4.29+esm6
  php5-cli                        5.5.9+dfsg-1ubuntu4.29+esm6
  php5-fpm                        5.5.9+dfsg-1ubuntu4.29+esm6

Ubuntu 12.04 ESM:
  libapache2-mod-php5             5.3.10-1ubuntu3.40
  php5-cgi                        5.3.10-1ubuntu3.40
  php5-cli                        5.3.10-1ubuntu3.40
  php5-fpm                        5.3.10-1ubuntu3.40

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

References:
  https://usn.ubuntu.com/4166-2
  https://usn.ubuntu.com/4166-1
  CVE-2019-11043