Ubuntu Security Notices
USN-5125-1

USN-5125-1: PHP vulnerability

Publication date

27 October 2021

Overview

PHP-PFM in PHP could be made to run program as an administrator if it received specially crafted input.

Releases

21.10 21.04 20.04 LTS 18.04 LTS 16.04 LTS 14.04 LTS

Packages

php5 - HTML-embedded scripting language interpreter
php7.0 - HTML-embedded scripting language interpreter
php7.2 - HTML-embedded scripting language interpreter
php7.4 - HTML-embedded scripting language interpreter
php8.0 - HTML-embedded scripting language interpreter

Details

It was discovered that PHP-FPM in PHP incorrectly handled certain inputs.
An attacker could possibly use this issue to cause a crash or execute
arbitrary code.

Update instructions

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

Learn more about how to get the fixes.

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

Ubuntu Release	Package Version
21.10 impish	php8.0-fpm – 8.0.8-1ubuntu0.1
21.04 hirsute	php7.4-fpm – 7.4.16-1ubuntu2.2
20.04 focal	php7.4-fpm – 7.4.3-4ubuntu2.7
18.04 bionic	php7.2-fpm – 7.2.24-0ubuntu0.18.04.10
16.04 xenial	php7.0-fpm – 7.0.33-0ubuntu0.16.04.16+esm2
14.04 trusty	php5-fpm – 5.5.9+dfsg-1ubuntu4.29+esm15

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References

CVE-2021-21703

CVE-2021-21703