Nicholas Whittaker • 7/15/2021

A close call with Nginx and the alias directive

The article details a personal experience where a developer removed a trailing slash from an Nginx `alias` directive to improve user convenience. This change inadvertently created a critical directory traversal vulnerability, allowing access to sensitive files like TLS private keys. It serves as a technical lesson on the security implications of Nginx configuration and the importance of understanding the `alias` directive's behavior.

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#security #web server #nginx