PHP-2320 - PHP disabled functions

This information is provided as part of the Lynis community project. It is related to Lynis control PHP-2320 and should be considered as-is and without guarantees. Any advice and commands should be tested before implementing them in production environments.

Control details
CategoryPHP
Application

Description

PHP enables system administrators to disable possible harmful functions. Depending on the software being used, many functions are not needed for proper functioning. An example of this would be the possibility to download a remote file via PHP, which is only needed in some applications.

How to solve

If you are hosting just one PHP based application, it may be useful to analyze the used functions and restrict all others posing risk. For example to open a remote file or socket.

Additional resources

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About

Lynis is a technical security auditing tool for Unix flavors like Linux, macOS, AIX, Solaris, and *BSD. It is open source software and free to use. Typical usage include system hardening, compliance testing, and vulnerability scanning. The project has an active community, including development via GitHub.

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