A PHP security update has been released for Ubuntu Linux 16.04 ESM.

USN-5479-2: PHP vulnerabilities

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Ubuntu Security Notice USN-5479-2
July 04, 2022

php7.0 vulnerabilities
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A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 16.04 ESM

Summary:

Several security issues were fixed in PHP.

Software Description:
- php7.0: HTML-embedded scripting language interpreter

Details:

USN-5479-1 fixed vulnerabilities in PHP. This update provides the
corresponding updates for Ubuntu 16.04 ESM.

Original advisory details:

Charles Fol discovered that PHP incorrectly handled initializing certain
arrays when handling the pg_query_params function. A remote attacker could
use this issue to cause PHP to crash, resulting in a denial of service, or
possibly execute arbitrary code. (CVE-2022-31625)
Charles Fol discovered that PHP incorrectly handled passwords in mysqlnd. A
remote attacker could use this issue to cause PHP to crash, resulting in a
denial of service, or possibly execute arbitrary code. (CVE-2022-31626)

Update instructions:

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

Ubuntu 16.04 ESM:
libapache2-mod-php7.0 7.0.33-0ubuntu0.16.04.16+esm4
php7.0-cgi 7.0.33-0ubuntu0.16.04.16+esm4
php7.0-cli 7.0.33-0ubuntu0.16.04.16+esm4
php7.0-fpm 7.0.33-0ubuntu0.16.04.16+esm4
php7.0-mysql 7.0.33-0ubuntu0.16.04.16+esm4
php7.0-pgsql 7.0.33-0ubuntu0.16.04.16+esm4

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

References:
https://ubuntu.com/security/notices/USN-5479-2
https://ubuntu.com/security/notices/USN-5479-1
CVE-2022-31625, CVE-2022-31626