J3.x:Timeout installing extensions

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Some websites updating to Joomla 3.9.23 installing or updating a extension could lead to a timeout.

Versions affected

General Information

This pertains only to Joomla! version(s): 3.9.23

What is the cause

The updated ZIP file decompression routine to support php 8 could lead to a much longer decompression time. Depending on the installed extension and webserver configuration this could result in an error because of a timeout.

How to fix

Update to Joomla 3.9.24. In the meantime replacing the content of libraries/vendor/joomla/archive/src/Zip.php with the updated version.