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

USN-5983-1: Nette vulnerability

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Ubuntu Security Notice USN-5983-1
March 29, 2023

php-nette vulnerability
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A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 18.04 LTS
- Ubuntu 16.04 ESM

Summary:

Nette could be made to run programs if it received specially crafted
network traffic.

Software Description:
- php-nette: Nette Framework

Details:

Cyku Hong discovered that Nette was not properly handling and validating
data used for code generation. A remote attacker could possibly use this
issue to execute arbitrary code.

Update instructions:

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

Ubuntu 18.04 LTS:
php-nette 2.4-20160731-1ubuntu0.1

Ubuntu 16.04 ESM:
php-nette 2.3.8-1ubuntu1+esm1

After a standard system update you need to restart any applications using
Nette to make all the necessary changes.

References:
https://ubuntu.com/security/notices/USN-5983-1
CVE-2020-15227

Package Information:
https://launchpad.net/ubuntu/+source/php-nette/2.4-20160731-1ubuntu0.1