Ubuntu Security Notice USN-5303-1

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Ubuntu Security Notice USN-5303-1
February 28, 2022

php7.4, php8.0 vulnerability
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A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 21.10
- Ubuntu 20.04 LTS

Summary:

PHP could be made to crash or run programs if it received specially crafted
input.

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

Details:

It was discovered that PHP incorrectly handled certain scripts.
An attacker could possibly use this issue to cause 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 21.10:
   php8.0-cgi                      8.0.8-1ubuntu0.2
   php8.0-cli                      8.0.8-1ubuntu0.2
   php8.0-fpm                      8.0.8-1ubuntu0.2

Ubuntu 20.04 LTS:
   php7.4-cgi                      7.4.3-4ubuntu2.9
   php7.4-cli                      7.4.3-4ubuntu2.9
   php7.4-fpm                      7.4.3-4ubuntu2.9

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

References:
   https://ubuntu.com/security/notices/USN-5303-1
   CVE-2021-21708

Package Information:
   https://launchpad.net/ubuntu/+source/php8.0/8.0.8-1ubuntu0.2
   https://launchpad.net/ubuntu/+source/php7.4/7.4.3-4ubuntu2.9