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

php5 vulnerabilities
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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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