==========================================================================
Ubuntu Security Notice USN-6757-1
April 29, 2024

php7.0, php7.2, php7.4, php8.1 vulnerabilities
==========================================================================

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

- Ubuntu 22.04 LTS
- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS
- Ubuntu 16.04 LTS

Summary:

Several security issues were fixed in PHP.

Software Description:
- php8.1: HTML-embedded scripting language interpreter
- php7.4: HTML-embedded scripting language interpreter
- php7.2: HTML-embedded scripting language interpreter
- php7.0: HTML-embedded scripting language interpreter

Details:

It was discovered that PHP incorrectly handled PHP_CLI_SERVER_WORKERS variable.
An attacker could possibly use this issue to cause a crash or execute
arbitrary code. This issue only affected Ubuntu 20.04 LTS, and
Ubuntu 22.04 LTS. (CVE-2022-4900)

It was discovered that PHP incorrectly handled certain cookies.
An attacker could possibly use this issue to cookie by pass.
(CVE-2024-2756)

It was discovered that PHP incorrectly handled some passwords.
An attacker could possibly use this issue to cause an account takeover
attack. (CVE-2024-3096)

Update instructions:

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

Ubuntu 22.04 LTS
  libapache2-mod-php8.1           8.1.2-1ubuntu2.16
  php8.1                          8.1.2-1ubuntu2.16
  php8.1-cgi                      8.1.2-1ubuntu2.16
  php8.1-cli                      8.1.2-1ubuntu2.16
  php8.1-fpm                      8.1.2-1ubuntu2.16
  php8.1-xml                      8.1.2-1ubuntu2.16

Ubuntu 20.04 LTS
  libapache2-mod-php7.4           7.4.3-4ubuntu2.21
  php7.4                          7.4.3-4ubuntu2.21
  php7.4-cgi                      7.4.3-4ubuntu2.21
  php7.4-cli                      7.4.3-4ubuntu2.21
  php7.4-fpm                      7.4.3-4ubuntu2.21
  php7.4-xml                      7.4.3-4ubuntu2.21

Ubuntu 18.04 LTS
  libapache2-mod-php7.2           7.2.24-0ubuntu0.18.04.17+esm3
                                  Available with Ubuntu Pro
  php7.2                          7.2.24-0ubuntu0.18.04.17+esm3
                                  Available with Ubuntu Pro
  php7.2-cgi                      7.2.24-0ubuntu0.18.04.17+esm3
                                  Available with Ubuntu Pro
  php7.2-cli                      7.2.24-0ubuntu0.18.04.17+esm3
                                  Available with Ubuntu Pro
  php7.2-fpm                      7.2.24-0ubuntu0.18.04.17+esm3
                                  Available with Ubuntu Pro
  php7.2-xml                      7.2.24-0ubuntu0.18.04.17+esm3
                                  Available with Ubuntu Pro

Ubuntu 16.04 LTS
  libapache2-mod-php7.0           7.0.33-0ubuntu0.16.04.16+esm9
                                  Available with Ubuntu Pro
  php7.0                          7.0.33-0ubuntu0.16.04.16+esm9
                                  Available with Ubuntu Pro
  php7.0-cgi                      7.0.33-0ubuntu0.16.04.16+esm9
                                  Available with Ubuntu Pro
  php7.0-cli                      7.0.33-0ubuntu0.16.04.16+esm9
                                  Available with Ubuntu Pro
  php7.0-fpm                      7.0.33-0ubuntu0.16.04.16+esm9
                                  Available with Ubuntu Pro
  php7.0-xml                      7.0.33-0ubuntu0.16.04.16+esm9
                                  Available with Ubuntu Pro

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

References:
  https://ubuntu.com/security/notices/USN-6757-1
  CVE-2022-4900, CVE-2024-2756, CVE-2024-3096

Package Information:
  https://launchpad.net/ubuntu/+source/php8.1/8.1.2-1ubuntu2.16
  https://launchpad.net/ubuntu/+source/php7.4/7.4.3-4ubuntu2.21