A PHP security update has been released for Ubuntu Linux 16.04 LTS and 18.04 LTS.

[USN-6199-2] PHP vulnerability

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Ubuntu Security Notice USN-6199-2
October 23, 2023

php7.0, php7.2 vulnerability
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A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 18.04 LTS (Available with Ubuntu Pro)
- Ubuntu 16.04 LTS (Available with Ubuntu Pro)

Summary:

PHP could be made to expose sensitive information.

Software Description:
- php7.2: HTML-embedded scripting language interpreter
- php7.0: HTML-embedded scripting language interpreter

Details:

USN-6199-1 fixed a vulnerability in PHP. This update provides the
corresponding update for Ubuntu 16.04 LTS and Ubuntu 18.04 LTS.

Original advisory details:

It was discovered that PHP incorrectly handled certain Digest
authentication for SOAP. An attacker could possibly use this issue
to expose sensitive information.

Update instructions:

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

Ubuntu 18.04 LTS (Available with Ubuntu Pro):
libapache2-mod-php7.2 7.2.24-0ubuntu0.18.04.17+esm1
php7.2 7.2.24-0ubuntu0.18.04.17+esm1
php7.2-cgi 7.2.24-0ubuntu0.18.04.17+esm1
php7.2-cli 7.2.24-0ubuntu0.18.04.17+esm1
php7.2-soap 7.2.24-0ubuntu0.18.04.17+esm1

Ubuntu 16.04 LTS (Available with Ubuntu Pro):
libapache2-mod-php7.0 7.0.33-0ubuntu0.16.04.16+esm7
php7.0 7.0.33-0ubuntu0.16.04.16+esm7
php7.0-cgi 7.0.33-0ubuntu0.16.04.16+esm7
php7.0-cli 7.0.33-0ubuntu0.16.04.16+esm7
php7.0-soap 7.0.33-0ubuntu0.16.04.16+esm7

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

References:
https://ubuntu.com/security/notices/USN-6199-2
https://ubuntu.com/security/notices/USN-6199-1
CVE-2023-3247