The PHP 7.2 packages for Ubuntu Linux 18.04 LTS has been updated with a security patch for the exif module

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Ubuntu Security Notice USN-3702-2
July 05, 2018

php7.2 vulnerability
==========================================================================

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

- Ubuntu 18.04 LTS

Summary:

PHP could be made to crash or run programs if it opened a specially crafted
file.

Software Description:
- php7.2: HTML-embedded scripting language interpreter

Details:

USN-3702-1 fixed a vulnerability in PHP. PHP 7.2.7 did not actually include
the fix for CVE-2018-12882. This update adds a backported patch to correct
the issue.

We apologize for the inconvenience.

Original advisory details:

It was discovered that PHP incorrectly handled exif tags in certain images.
A remote attacker could use this issue to cause PHP to crash, resulting in
a denial of service, or possibly execute arbitrary code.

Update instructions:

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

Ubuntu 18.04 LTS:
libapache2-mod-php7.2 7.2.7-0ubuntu0.18.04.2
php7.2-cgi 7.2.7-0ubuntu0.18.04.2
php7.2-cli 7.2.7-0ubuntu0.18.04.2
php7.2-fpm 7.2.7-0ubuntu0.18.04.2

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

References:
https://usn.ubuntu.com/usn/usn-3702-2
https://usn.ubuntu.com/usn/usn-3702-1
CVE-2018-12882

Package Information:
https://launchpad.net/ubuntu/+source/php7.2/7.2.7-0ubuntu0.18.04.2

  PHP 7.2 Security Update for Ubuntu 18.04 updated