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I have access to MySQL database which the current user has FILE privilege. I want to upload a web shell but I do not know the root directory of the web server.

Is it possible to somehow locate the root directory using a SQL query?

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If you have permissions to write files, you probably have permission to read them, too.

I'd start from reading web server configuration files, e.g.

SELECT * LOAD_FILE('/etc/apache2/apache2.conf');
SELECT * LOAD_FILE('/etc/nginx/nginx.conf');

However, it's not guaranteed that the MySQL has permissions to write to the document root.

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  • Figured out that the system was running on Alpine Linux, the web server configuration is located at "/opt/apache2/apache2.conf". Thanks! Aug 29 '20 at 9:48

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