USN-3566-1: PHP vulnerabilities

12 February 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

To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.

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

References