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Ubuntu 21.10, 20.04 LTS USN-5303-1 Critical: PHP Denial Of Service

ubuntu
Calendar Grey February 28, 2022
Dist Ubuntu Esm H88
PHP might lead to system failures or enable code execution via specially designed inputs, impacting various versions of Ubuntu.
PHP could be made to crash or run programs if it received specially crafted input.

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.

Topics%20covered

Topics Covered

security advisory denial of service critical code execution php package update ubuntu

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

Severity
critical
Lowest
Low
Medium
High
Critical

February 28, 2022

Topics%20covered

Topics Covered

security advisory denial of service critical code execution php package update ubuntu

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

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