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proc/self/environ

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What is this endpoint?

proc/self/environ

Linux process-environment pseudo-file, a classic local-file-inclusion and SSRF target

What an attacker could do

On a successful local file inclusion or path traversal, this leaks the process environment including DB passwords, API keys, and session secrets, and is a classic vector for environ-based code execution.

How to defend it

Validate and canonicalize all file paths, disable inclusion of user-controlled paths, run with allow_url_include off, and apply least-privilege file permissions to block traversal.

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Want to dive deeper into this topic? Check out the official documentation.

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