USN-3566-1: PHP vulnerabilities

Ubuntu Security Notice USN-3566-1

12th 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 version:

Ubuntu 14.04 LTS:
php5-cli

5.5.9+dfsg-1ubuntu4.23
php5-cgi

5.5.9+dfsg-1ubuntu4.23
libapache2-mod-php5

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

CVE-2017-12933,

CVE-2017-16642,

CVE-2018-5712

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