[USN-3566-1] PHP vulnerabilities

[Marc Deslauriers]

==========================================================================
Ubuntu Security Notice USN-3566-1
February 12, 2018

php5 vulnerabilities
==========================================================================

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

- Ubuntu 14.04 LTS

Summary:

Several security issues were fixed in PHP.

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

Details:

It was discovered that PHP incorrectly handled the PHAR 404 error page. A
remote attacker could possibly use this issue to conduct cross-site
scripting (XSS) attacks. (CVE-2018-5712)

It was discovered that PHP incorrectly handled memory when unserializing
certain data. A remote attacker could use this issue to cause PHP to crash,
resulting in a denial of service, or possibly execute arbitrary code.
(CVE-2017-12933)

It was discovered that PHP incorrectly handled 'front of' and 'back of'
date directives. A remote attacker could possibly use this issue to obtain
sensitive information. (CVE-2017-16642)

Update instructions:

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

Ubuntu 14.04 LTS:
  libapache2-mod-php5             5.5.9+dfsg-1ubuntu4.23
  php5-cgi                        5.5.9+dfsg-1ubuntu4.23
  php5-cli                        5.5.9+dfsg-1ubuntu4.23
  php5-fpm                        5.5.9+dfsg-1ubuntu4.23

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

References:
  https://www.ubuntu.com/usn/usn-3566-1
  CVE-2017-12933, CVE-2017-16642, CVE-2018-5712

Package Information:
  https://launchpad.net/ubuntu/+source/php5/5.5.9+dfsg-1ubuntu4.23


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